Practice Test

Q1) Engelmann's experiment with Spirogyra demonstrated that: Show Answer

Q2) Red and blue light support the highest rates of synthesis because: Show Answer

Q3) The role of phycobilins in photosynthesis is to: Show Answer

Q4) A cell that lacks chloroplast does not: Show Answer

Q5) Energy is transferred from the light reaction step to the dark reaction step by: Show Answer

Q6) In photosynthesis the oxygen evolved and oxygen in glucose come from: Show Answer

Q7) Algae float in the water during day time and sink during night time because: Show Answer

Q8) In the photosynthesis chlorophyll serves as: Show Answer

Q9) The first step in photosynthesis is: Show Answer

Q10) "Assimilatroy Power" is: Show Answer

Q11) The site of dark reaction in plastid is: Show Answer

Q12) The products of light reaction in photosynthesis are: Show Answer

Q13) Chloroplasts fix: Show Answer

Q14) All photosynthetic green plants contain: Show Answer

Q15) The principle of limiting factor was proposed by: Show Answer

Q16) The sequence of dark reaction of photosynthesis was discovered by: Show Answer

Q17) Photophosphorylation takes place: Show Answer

Q18) The process of conversion of light energy into chemical energy is called: Show Answer

Q19) Etiolated plants are formed due to lack of: Show Answer

Q20) In photosystem I, the trap centre of energy is: Show Answer

Q21) In photosystem II, the trap centre of energy is: Show Answer

Q22) In photosynthesis, the sunlight: Show Answer

Q23) Sunlight is converted into chemical energy, stored in the green parts of the plant, and utilised in the synthesis of organic compounds during the process of: Show Answer

Q24) The role of chlorophyll in photosynthesis is the absorption: Show Answer

Q25) The Hill (Light) reaction or photochemical phase of photosynthesis results in the production of: Show Answer

Q26) Photosynthesis is a: Show Answer

Q27) During photosynthesis, the function of solar energy is: Show Answer

Q28) What happens during photosynthetic phosphorylation? Show Answer

Q29) In a chloroplast, the site for light reaction is: Show Answer

Q30) Leaves appear green because they: Show Answer

Q31) The 1992 Noble Prize for the medicine was awarded to Edmond Fischer and Edwin Krebs for their work on: Show Answer

Q32) The leaves appear yellow when grown in: Show Answer

Q33) In the process of photosynthesis, the first step is: Show Answer

Q34) The substrate for photorespirationis: Show Answer

Q35) Chlorophyll 'a' is characterized by the side group of: Show Answer

Q36) During the Calvin cycle, sedoheptulose-1, 7-diphosphate is formed from: Show Answer

Q37) In plants synthesis of chlorophyll occurs in presence of: Show Answer

Q38) Persons who got Noble Prize for their work in photosynthesis are: Show Answer

Q39) Chlorophyll is soluble: Show Answer

Q40) The process of photophosphorylation was studied by: Show Answer

Q41) The 'Dark Reaction' in photosynthesis is called so because it: Show Answer

Q42) The corret formula of chlorophyll 'a' is: Show Answer

Q43) Agranal chloroplasts are a characteristic feature of one of the following: Show Answer

Q44) Which of the following is Hill Reaction: Show Answer

Q45) Photochemical reaction takes place in: Show Answer

Q46) The trapping centre of light energy in photosystem II is: Show Answer

Q47) Which pigment is absent in chloroplast? Show Answer

Q48) The plant which is used for study of photosynthesis research is: Show Answer

Q49) Chlorophyll absorbs: Show Answer

Q50) Starch is detected in leaf: Show Answer

Q51) Cyclic phosphorylation produces: Show Answer

Q52) Maximal rates of photosynthesis are obtained in: Show Answer

Q53) The electron donor in the photosynthetic process taking place in the eukaryotic plants is: Show Answer

Q54) Which of the following enzymes is used for carboxylation of RuDP? Show Answer

Q55) Grana refers to: Show Answer

Q56) When a green cell transfers light energy into chemical energy which of the following reactions would take place? Show Answer

Q57) Starch containing plastids are termed: Show Answer

Q58) The electron carrier which in close association with photosynthetic pigment systems form an electron transport chain are: Show Answer

Q59) Chloroplast contains maximam quantity of: Show Answer

Q60) The process of photosynthesis is: Show Answer

Q61) The light energy used by the higher plants for photosynthesis is only about: Show Answer

Q62) Calvin used which plant to trace out the carbon path? Show Answer

Q63) Calvin cycle was investigated by the use of: Show Answer

Q64) Photorespiration is favoured by: Show Answer

Q65) Calvin cycle is: Show Answer

Q66) Photosynthesis rate per unit of light energy would be more in: Show Answer

Q67) What is the smallest photosynthetically functional unit? Show Answer

Q68) Photorespiration occurs in: Show Answer

Q69) Photosynthetic rate is independent of: Show Answer

Q70) The specific function of light energy in photosynthesis process is to: Show Answer

Q71) Which of the following wavelengths of light is absorbed maximum for photosynthesis? Show Answer

Q72) Purple sulphur bacteria are: Show Answer

Q73) The connecting link between respiration and photosynthesis is: Show Answer

Q74) Which of the following is a Hill's reaction? Show Answer

Q75) The pigment that absorbs red and far red light in plants is: Show Answer

Q76) When PGA is changed into phosphoglyceraldehyde during photosynthesis, which of the following reactions occurs? Show Answer

Q77) During ATP synthesis, electrons pass through: Show Answer

Q78) 85-90% (or nine-tenth) of all the photosynthesis of the world is carried out by: Show Answer

Q79) Food is transported to various parts of plants through: Show Answer

Q80) Translocation of sugar in flowering plant occurs in the form of: Show Answer

Q81) Which of the following trees would die quicker? Show Answer

Q82) Mass flow hypothesis regarding translocation of foods was given by: Show Answer

Q83) Presence of bicollateral vascular bundle provides evidence that conduction of food takes place through: Show Answer

Q84) The chemical composition of pigments, chlorophylls and carotenoids for the first time was given by: Show Answer

Q85) Which of the following colours of light work(s) least well for photosynthesis? Show Answer

Q86) Melvin Calvin was awarded Noble Prize in: Show Answer

Q87) The process of respiration and photosynthesis have one thing in common, viz: Show Answer

Q88) First stable product of dark reaction in C_4 plants is: Show Answer

Q89) If the carbon dioxide content of the atmosphere is as high as 300 parts per million, plants: Show Answer

Q90) By placing a variegated leaf in the Moll's half leaf experiment, we can demonstrate the significance of: Show Answer

Q91) Four inverted funnel experiments are set, namely A, B, C and D. While A remains uncovered, B is covered by red butter paper, C by green and D by blue. They are placed in sunlight. Maximum rate of photosynthesis is seen in: Show Answer

Q92) The minimum rate of photosynthesis in the above experiment is seen in: Show Answer

Q93) Three inverted funnel experiments namely A, B, and C with identical Hydrilla twigs having equal number of nodes. In experiment A all the leaves are kept intact. In B, 50% upper nodes and in C, 50% lower nodes are defoliated. How much shall be total photosynthesis and the photosynthetic rates? Show Answer

Q94) Van Helmont (1648) in his experiment with willow twig, would have probably realized that his conclusion was wrong, if he had: Show Answer

Q95) Pepco occurs in: Show Answer

Q96) The cytochromes participating in bacterial photosynthesis arae: Show Answer

Q97) The excited state of a pigment molecule lasts for: Show Answer

Q98) Photorespiration includes: Show Answer

Q99) Role of light in photosynthesis was discovered by: Show Answer

Q100) Which element is essential for photolysis of water? Show Answer

Q101) Assimilatory powers produced during photosynthesis are: Show Answer

Q102) Which of the following is present ar 3 carbon atom of II pyrrole ring of chlorophyll a molecule? Show Answer

Q103) Which of the following wavelengths is active in view of photosynthesis? Show Answer

Q104) The isotopes that have proved useful in researches on photosynthesis are: Show Answer

Q105) Non-cyclic photophosphorylation involves: Show Answer

Q106) Photophosphorylation means: Show Answer

Q107) Which one of the following is needed in both photosynthesis and respiration? Show Answer

Q108) Calvin cycle occurs in: Show Answer

Q109) Photolysis of water during photosynthesis occurs with the help of: Show Answer

Q110) The process of photosynthesis takes place in: Show Answer

Q111) Photosynthesis is a process by which the plants prepare food materials in the way: Show Answer

Q112) In which of the following plants type, both PEP carboxylase and RuBP carboxylase are present in the chloroplasts? Show Answer

Q113) Thylakoid bodies in the grana possess the photosynthesis units that are named as: Show Answer

Q114) The chlorophyll molecule has: Show Answer

Q115) Hill reaction in photosynthesis refers to: Show Answer

Q116) The alga which is used in researches of photosynthesis: Show Answer

Q117) Step of photosynthesis that requires direct light: Show Answer

Q118) Ferredoxin is: Show Answer

Q119) The Pigment present universally in all green oxygenic plants is: Show Answer

Q120) Carbon dioxide is fixed in: Show Answer

Q121) Direction of conduction of food through phloem is: Show Answer

Q122) Which of the following occurs in dark reaction of photosynthesis? Show Answer

Q123) First reaction in photosynthesis is: Show Answer

Q124) Chemical which absorbs light energy and changes it to chemical energy is: Show Answer

Q125) Which pair is wrong? Show Answer

Q126) Which pigment system is inactivated in red drop: Show Answer

Q127) Which plant is LDP: Show Answer

Q128) Proteinaceous pigment which controls the activites concerned with light is: Show Answer

Q129) Which one of the following is the aim of Moll's halfleaf experiment? Show Answer

Q130) Cyclic photophosphorylation form: Show Answer

Q131) Which of the following possess both PS - I and PS - II? Show Answer

Q132) Which of the following provides energy to ETS by absorption of sunlight? Show Answer

Q133) Photosystem II occurs in: Show Answer

Q134) ETS associated with photophosphorylation occurs in: Show Answer

Q135) Hill reaction occurs in: Show Answer

Q136) Which of the following is not an electron carrier? Show Answer

Q137) Who demonstrated photolysis of water by isolated chloroplasts? Show Answer

Q138) As compared to sun plants, plants adapted to low light intensity possess: Show Answer

Q139) Photosynthesis active radiation (PAR) has the following range of wavelengths: Show Answer

Q140) Pathway of Calvin cycle was discovered by using an isotope of: Show Answer

Q141) Chloroplast lacks: Show Answer

Q142) Bacterial photosynthesis does not show: Show Answer

Q143) Phenomenon which converts light energy into chemical energy is: Show Answer

Q144) In photosystem_I, the first electron acceptor is: Show Answer

Q145) The translocation of organic solutes in sieve tube members is supported by: Show Answer

Q146) Which of the following three organelles are involved in photorespiration? Show Answer

Q147) Which of the following is photophosphorylation? Show Answer

Q148) Electrons from excited chlorophyll molecule of photosystem II are accepted first by: Show Answer

Q149) CAM helps the plants in: Show Answer

Q150) The molecular formula of bacterio-chlorophyll a is: Show Answer

Q151) The main difference in two light reactions of photosynthesis is: Show Answer

Q152) The light reactions of photosynthesis are initiated by: Show Answer

Q153) According to recent Z-scheme, the electron released on behalf of PS II is accepted by: Show Answer

Q154) The gap electron of PS II is filled due to supply of electron from: Show Answer

Q155) The PS II is thought to be bound to: Show Answer

Q156) If isolated chloroplasts suspended in aqueous medium are supplied with inorganic phosphate, ADP, NADP are illuminated they show: Show Answer

Q157) Wilmott's bubbler is meant for proving: Show Answer

Q158) The sap that flows out of the stem comes from: Show Answer

Q159) Though potato tubers do not manufacture organic food, it is stored in them in large amounts. This is due to: Show Answer

Q160) A major drawback of Munch hypothesis is: Show Answer

Q161) High energy' electrons from PS-I pass ot NADP where they combine with hydrogen ions, which come from the initial photolysis of water, to form: Show Answer

Q162) The cyclic electron pathway begins after: Show Answer

Q163) The Calvin cycle proceeds in three stages.
1. reduction, during which carbohydrate is formed at the expense of the photochemically made ATP and NADPH
2. regeneration, during which the carbon dioxide acceptor ribulose-1, 5-biphosphate is formed
3. carboxylation,during which carbon dioxide combines with ribulose-1, 5-biphosphate. Show Answer

Q164) Consider the following statements:
(a) The portion of the spectrum between 500 nm and 800 nm is also referred to as photosynthetically active radiation (PAR)
(b) Magnesium, calcium and chloride ions play prominent roles in the photolysis of water
(c) In cyclic photohposrylation, oxygen is not released (as there is no photolysis of water) and NADPH is also not produced.
Of these statements given above Show Answer

Q165) Which if the following is a simplified equation of photosynthesis? Show Answer

Q166) Proton gradient is broken down due to Show Answer

Q167) Which of the following is a simplified equation of photosynthesis? Show Answer

Q168) The membrane of thylakoid is called Show Answer

Q169) The law of limiting factors was proposed with particular reference to photosynthesis. Identify the
scientise, who proposed this law? Show Answer

Q170) The synthesis of one molecule of glucose during Calvin cycle requires Show Answer

Q171) In CAM-plants, carbon dioxide acceptor is Show Answer

Q172) Which factor is not limiting in normal condition for photosynthesis? Show Answer

Q173) PS is made up of which of the following? Show Answer

Q174) In higher plants, the shape of the chloroplast is Show Answer

Q175) Cyclic photophosphorylation produces Show Answer

Q176) I. Tomato
II. Black pepper
III. Mango
From the above option choose the correct answer in respect of green house crops Show Answer

Q177) The two pigment system theory of photosynthesis was proposed by Show Answer

Q178) Which one of the following is not true about the light reactions of photosynthesis? Show Answer

Q179) By which plant pigment maximum absorption of radiation takes place in the blue and red regions of
absorption spectrum? Show Answer

Q180) In an experiment, a leaf was partially covered with black paper, and other one was exposed to light. On
testing these leaves for starch, in the presence of sunlight, on may conclude that photosynthesis had
occurred in Show Answer

Q181) Kranz anatomy is a morphological diversity in the leaves of Show Answer

Q182) Which of the following is concerned with carbon dioxide fixation? Show Answer

Q183) Rubisco enzyme is absent in Show Answer

Q184) During the experiment in laboratory, the thylakoid is some how punctured so that the interior of the
thylakoid is no longer separated from stroma. This damage will have the direction effect on Show Answer

Q185) Cyclic photophosphorylation results only in the Show Answer

Q186) Under normal condition, which one of the following is a major limiting factor? Show Answer

Q187) Which one is essential for the respiration as well as photosynthesis? Show Answer

Q188) Light Harvesting Complex (LHC) is Show Answer

Q189) Which of the following represents the correct molecular formula of chlorophyll-b ? Show Answer

Q190) The following (I-IV) are the main steps of chemosynthetic ATP synthesis in the light reaction. Arrange
them in correct order
I. H+ concentration gradient established
II. H+ diffuses through ATP synthetase
III. Carriers use energy from electrons to move H+ across the membrane
IV. Electrons from PS-II pass along electron transport chain
V. Light excites electrons in PS-II
VI. Energy of H+ flow is used by ATP synthetase to make ATP Show Answer

Q191) What is the wavelength of radiations in visible sectrum? Show Answer

Q192) Which of the following is not related to photorespiration? Show Answer

Q193) The internal factors that affects photosynthesis of plant depends on the Show Answer

Q194) Maximum photosynthesis occurs in Show Answer

Q195) Energy transfer in photosynthesis occurs as Show Answer

Q196) What is true for photosynthesis? Show Answer

Q197) Chlorophyll in chloroplasts is located in Show Answer

Q198) Which photosystem is involved in cyclic photophosphorylation? Show Answer

Q199) The mechanism of ATP formation both in chloroplast and mitochondria is explained by Show Answer

Q200) Absorption spectrum of chlorophyll-a and the action spectrum of photosynthesis is identical because
chlorophyll-a Show Answer

Q201) Which would do maximum harm to a tree? Show Answer

Q202) A wastage process is Show Answer

Q203) Choose the correct statement. Show Answer

Q204) Conditions helpful in photorespiration are Show Answer

Q205) In which of the following form glucose is usually stored in plants? Show Answer

Q206) Light energy in photosynthesis is utilized in Show Answer

Q207) Stroma lamellae membrane lacks
I. PS-II
II. NADP reductase
III. non-cyclic photophosphorylation
Select the correct option Show Answer

Q208) RUBISCO stands for Show Answer

Q209) In chloroplasts, chlorophyll is present in the Show Answer

Q210) DCMC Show Answer

Q211) Malic acid (4-C) is produced in which plant without Kranz anatomy? Show Answer

Q212) Generally, plants adapted to dry tropical conditions have Show Answer

Q213) Correct sequence of rate of photosynthesis in different light is Show Answer

Q214) During the light reaction, the water splits into Show Answer

Q215) Adenosine diphosphate contains Show Answer

Q216) The thylakoids are aggregated to form stalks of discs called Show Answer

Q217) Which hypothesis best explains the synthesis of ATP in chloroplast? Show Answer

Q218) The main photosynthetic pigments in the plants are Show Answer

Q219) Example of water soluble plant pigment is Show Answer

Q220) PS-I and PS-II were discovered by Show Answer

Q221) ‘Hatch and Slack’ cycle is found in Show Answer

Q222) Which of the following statements is true with regard to light reaction of photosynthetic mechanism in
plants? Show Answer

Q223) Photosynthesis convert radient or solar energy into the Show Answer

Q224) Photolysis of each water molecule in light reaction will yield Show Answer

Q225) Which of the following is the first compound that accepts carbon dioxide during dark phase of
photosynthesis? Show Answer

Q226) In a CAM-plant, the concentration of organic acid Show Answer

Q227) Phytochrome occurs is two forms. In which from it promotes the germination of seeds of some species? Show Answer

Q228) Solarisation is Show Answer

Q229) In which one of the following nitrogen is not a constituent? Show Answer

Q230) If a chemical process is affected by more than one factors then its rate will be determined by Show Answer

Q231) I. Temperature
II. CO2 concentration
III. Chlorophyll arrangement
IV. Water
Among the given factors, identify the external factors that affects the rate of photosynthesis and correct
option accordingly Show Answer

Q232) Which activity is performed by PS-I in light reaction? Show Answer

Q233) A scientist disrupted the chloroplast and separated the stroma from lamella. For fixing CO2 he supplied
stroma with
I. ATP
II. NADPH
III. Glucose
Select the correct option Show Answer

Q234) PEP is present in Show Answer

Q235) The absorption spectrum of chlorophyll Show Answer

Q236) PGA as the first carbon dioxide fixation product was discovered in photosynthesis of Show Answer

Q237) Which chemical compound/molecule supplies electrons continuously to PS-II? Show Answer

Q238) Colour that we see in leaves is due to the presence of
I. Chlorophyll-a II. Chlorophyll-b
III. Xanthophyll IV. Carotenoid Show Answer

Q239) In Calvin cycle, if one molecule of RuBP is carboxylated than how many PGA molecule will be formed? Show Answer

Q240) The type of carbon dioxide fixation seen in many succulent plant species is Show Answer

Q241) Water stress causes the stomata to …A… hence reducing the …B… availability.
Here A and B refer to Show Answer

Q242) Photosynthesis cannot continue for long if during light reaction, only cyclic photophosphorylation takes
place. This is because Show Answer

Q243) Light reaction of photosynthesis occurs inside Show Answer

Q244) Bundle sheath cells are rich in which enzyme Show Answer

Q245) For yielding one molecule of glucose, the Calvin cycle turns Show Answer

Q246) The light reaction of photosynthesis end up in the formation of Show Answer

Q247) In leaves of C4-plants, malic acid synthesis during carbon dioxide fixation occurs in Show Answer

Q248) Biosynthetic phase of photosynthesis is the formation of Show Answer

Q249) What happen to the chloroplast pigment when they absorb light? Show Answer

Q250) Law of limiting factors was given by Show Answer

Q251) PS-I in cyclic photophosphorylation is involved in the formation of …A… by …B… movement of electrons
What does A and B refer here? Show Answer

Q252) The green-coloured pigment present in all autotrophs was named chlorophyll by Show Answer

Q253) Within the chloroplast, there is the membranous system consisting of
I. grana
II. stroma lamellae
III. fluid stroma
Choose the correct option Show Answer

Q254) Joseph Priestley observed that when mouse alone was placed in a closed bell jar with burning candle, it
was suffocated and candle burning extinguished but when mouse was placed with a mint plant in the same
bell jar, that mouse stayed alive and candle continued to burn. What he concluded from this experiment? Show Answer

Q255) Organelles involved in photorespiration is/are
I. chloroplast
II. peroxisomes
III. mitochondria
Choose the correct option Show Answer

Q256) The first step in dark reaction of photosynthesis is Show Answer

Q257) Calvin cycle is also called Show Answer

Q258) Photosynthesis is an important process for life on earth because Show Answer

Q259) The mineral involved in the photolysis of water are
I Manganese II Calcium
III magnesium IV Chloride Show Answer

Q260) Calvin cycle represents Show Answer

Q261) Identify the correct sequence of enzymes given below which participate in the regeneration phase of
Calvin cycle.
I. Ribulose-5-phosphate isomerase
II. Ribulose-5-phosphate epimerase
III. Transketolase
IV. Triose phosphate isomerase Show Answer

Q262) Photosynthetic pigments in chloroplast are embedded in the membrane of Show Answer

Q263) Pigments can be separated from leaf by Show Answer

Q264) In which of the following, oxygen does not evolve during photosynthesis? Show Answer

Q265) Who proved that the organic matter is synthesised from carbon dioxide and water during the
photosynthesis? Show Answer

Q266) Which of the following statements is true with regard to the light reaction of photosynthesis? Show Answer

Q267) In Calvin cycle, the first product identified was Show Answer

Q268) PS-I is located on the Show Answer

Q269) I. Chlorophyll-a
II. Chlorophyll-b
III. Anthocyanin
Select the correct option regarding water soluble pigment Show Answer

Q270) In the process of photosynthesis, water molecule breaks during Show Answer

Q271) In grana of chloroplast, the reaction ADP + Pi = ATP during day shows Show Answer

Q272) Very strong light has a direct inhibiting effect on photosynthesis, which is known as Show Answer

Q273) pH of thylakoid lumen during photosynthesis is Show Answer

Q274) Head portion of the chlorophyll is called …A… . Tail portion of the chlorophyll is called …B… . Fill in the with respect to A, B and tick the appropriate option Show Answer

Q275) Members of family-Crassulaceae perform Show Answer

Q276) …A… plants have the higher temperature optimum than …B… the plants adapted climate
Here A and B refer to Show Answer

Q277) Which is not correct for ancient plants? Show Answer

Q278) Which of the following cell organelles is associated with photorespiration? Show Answer

Q279) The protons are transported across the thylakoid membrane into the lumen because Show Answer

Q280) The light phase of photosynthesis is called Show Answer

Q281) Which of the following statements are correct?
I. Light reaction occurs in stroma
II. Light reaction occurs in grana
III. Dark reaction occurs in stroma
IV. Dark reaction occurs in grana
Choose the correct option Show Answer

Q282) In photosynthesis, what does occur in PS-II? Show Answer

Q283) Cyclic-photophosphorylation results in the formation of Show Answer

Q284) Which of the following statements with regard to photosynthesis is/are correct?
I. In C4-plants, the primary CO2 acceptor is PEP.
II. In the photosynthetic process, PS-II absorbs energy at or just below 680 nm.
III. The pigment that is present in the Pigment System-I isP683 Show Answer

Q285) Which one is the correct reaction of photosynthesis? Show Answer

Q286) I. Lysosome II. Chloroplast
III. Peroxisome IV. Mitochondria
Which of the following organelles is/are not related to photorespiration?
Choose the correct option Show Answer

Q287) In photosynthesis, action and absorption spectrum were related by Show Answer

Q288) Which of the following is the formula of chlorophyll-a? Show Answer

Q289) Oxygen which is liberated during photosynthesis, comes from Show Answer

Q290) Photosynthetic organisms remove ……… of carbon/year if assumed that the photosynthetic organisms use
0.1% of incident visible light Show Answer

Q291) Light reaction or photochemical phase includes
I. light absorption
II. water splitting
III. oxygen release
IV. ATP and NADP formation
Select the correct option Show Answer

Q292) Rate of photosynthesis is low in herbs, shurbs as compared to sun plants because Show Answer

Q293) PEPcase has an advantage over RuBisCo. The advantage is Show Answer

Q294) Activator of ribulose biphosphate carboxylase oxygenase is Show Answer

Q295) Which one of the following is wrong in relation to photorespiration? Show Answer

Q296) Flow of electrons in non-cyclic photo phosphorylation is Show Answer

Q297) Priestley discovered oxygen in Show Answer

Q298) Which of the following is wrongly matched? Show Answer

Q299) Transport of C4 acid from mesophyll cells to the bundle sheath cell takes place through Show Answer

Q300) Maximum amount of photosynthesis occurs in Show Answer

Q301) Sunken stomata are usually found in Show Answer

Q302) C3-plant show optimum photosynthesis at Show Answer

Q303) During C4-cycle, the acid formed are
I. Picric acid II. OAA
III. Malic acid IV. Aspartic acid
Select the correct option Show Answer

Q304) Presence of bundle sheath is a characteristic of Show Answer

Q305) I. They have special leaf anatomy
II. They tolerate high temperature
III. Lack photorespiration
IV. Greater productivity of biomass
These are the probable characters of Show Answer

Q306) In which region, most of the photosynthesis takes place? Show Answer

Q307) In an experiment demonstrating the evolution of oxygen in Hydrilla, sodium bicarbonate is added to water
in the experimental set-up. What would happen if all other conditions are favorable? Show Answer

Q308) The components of PS-I are located on the Show Answer

Q309) Cyclic photophosphorylation occurs in Show Answer

Q310) I. The electrons that carriers photophosphorylation are located in the thylakoid membrane
II. During photophosphorylation, the chloroplast stroma becomes more acidic than the interior of
thylakoid membrane
III. Protons diffuses through the protein channels which are ATP synthetase molecules
IV. ATP is formed from ADP + Pi on the stroma side of the thylakoid in the chloroplast
V. During photophosphorylation, water ionises to form H+, yielding electrons to PS-II
Which of the following statement are false? Show Answer

Q311) Identify from the following, a characteristic pigment, which contains copper containing protein Show Answer

Q312) Which of the following elements is an activator for both Ribulosebisphosphate carboxylase oxygenase and
phosphoenol pyruvate carboxylase in photosynthetic carbon fixation? Show Answer

Q313) Who experimentally proved that source of oxygen during photosynthesis is water? Show Answer

Q314) Warburg effect is the Show Answer

Q315) Oxaloacetic acid changes to the malic acid by the action of Show Answer

Q316) Consider the following statements.
I. The portion of the spectrum between 300-500 nm is also referred to as Photosynthetically Active
Radiation (PAR).
II. Magnesium, calcium and chloride ions play prominent roles in the photolysis of water.
III. In cyclic photophosphorylation, oxygen is not released (as there is no photolysis of water) and NADPH
is also not produced. Show Answer

Q317) When two photosystem (I and II) work in a series, the phosphorylation is called Show Answer

Q318) The ATPase enzyme consists of
I. F0 II. F1 III. F2
Select the correct option Show Answer

Q319) Chemiosmosis requires
I. a membrane
II. a proton pump
III. a proton gradient
Select the correct option Show Answer

Q320) Biosynthetic phase of photosynthesis is dependent on
I. NADPH II. NADH
III. ATP IV. NAD+ + H+ Show Answer

Q321) Kranz anatomy is the characteristics of Show Answer

Q322) In which type of reactions related to plant photosynthesis peroxisomes are involved? Show Answer

Q323) Photosynthesis is a Show Answer

Q324) Beyond of saturation point, the photosynthesis begins to decline because of
I. Photo inbibition
II. Photo-oxidation
III. Photo-reduction
Select the/correct option which matches with statement Show Answer

Q325) A chemical substance when irradiated with UV rays, absiorb radiations and emits visible light is called Show Answer

Q326) Chlorophyll-a and b differ in having Show Answer

Q327) Of the total incident solar radiation the proportion of PAR is Show Answer

Q328) Who discovered that light is essential for releasing oxygen in plants? Show Answer

Q329) How many Calvin cycles are required to produce 5 molecules of glucose? Show Answer

Q330) During light reaction of photosynthesis Show Answer

Q331) The ATP production in photosynthesis is called Show Answer

Q332) Who described the first action spectrum of photosynthesis? Show Answer

Q333) Who provided the evidence for the production of glucose when plant grows? Show Answer

Q334) Which of the following is used during discovery of Calvin cycle? Show Answer

Q335) The movement of electrons in ETC in light reaction is? Show Answer

Q336) The wavelength of light absorbed by Pr from of phytochrome is Show Answer

Q337) In C4- plants, the carbon dioxide fixation accurs in Show Answer

Q338) What is the name given to the flattened membranous sacs which are embedded in the matrix of the
chloroplast? Show Answer

Q339) Which of the following is maximum in chloroplast? Show Answer

Q340) Photolysis of water releases
I. electron
II. proton
III. oxygen
Select the correct option Show Answer

Q341) The Z scheme of electron transport is Show Answer

Q342) Photophosphorylation in chloroplast is most similar to the Show Answer

Q343) In photosynthesis, energy from light reaction to dark reaction is transferred in the form of Show Answer

Q344) RuBisCo performs oxygenase activity at Show Answer

Q345) In bundle, sheath cells are the large cells around the Show Answer

Q346) Number of carboxylation occurs in Calvin cycle is Show Answer

Q347) Plants adapted to low light intensity have Show Answer

Q348) The first action spectrum of photosynthesis was described by Engelman was related to Show Answer

Q349) To form one molecule of glyceraldehydes phosphate in Calvin cycle Show Answer

Q350) Light compensation point is the point where Show Answer

Q351) During photorespiration, the oxygen consuming reaction(s) occur in Show Answer

Q352) Which one of the following concerns Photophosphorylation? Show Answer

Q353) In an experiment, chloroplasts were made acidic by soaking them in acidic solution. What will happen if
this chloroplast is transferred to a solution having basic pH? Show Answer

Q354) If the light becomes unavailable during photosynthesis then Show Answer

Q355) I. In photosynthesis, the proton accumulation is towards the inside of membrane of thylakoid
II. In respiration, proton accumulation occurs in the inter membrane space of the mitochondria
Select the correct option Show Answer

Q356) Chloroplasts without grana are known to occur in Show Answer

Q357) PGA, the first carbon dioxide fixation product was firstly discovered in Show Answer

Q358) Liberation of oxygen when green cells in water are exposed to sunlight in presence of suitable acceptor is
called Show Answer

Q359) In half leaf experiment, a part of a leaf is enclosed in a test tube containing KOH soaked cotton, while the
other half is exposed to air and then setup is placed in light for sometime. It was latter found that part of
leaf which was exposed to air tested positive for starch. This indicates that Show Answer

Q360) ………….. Is a CAM plant. Show Answer

Q361) Proton gradient is very important across the membrane because Show Answer

Q362) The first acceptor of electrons from an excited chlorophyll molecule of
Photo system-II is Show Answer

Q363) Substance which is essential for the respiration as well as photosynthesis is Show Answer

Q364) Which of the following is a 4-carbon compound? Show Answer

Q365) A graph that plots the rate at which CO2 is converted to glucose versus the wavelength of light
illuminating a leaf is called Show Answer

Q366) Water stress makes plant leaves …A… thus, …B… the surface area of leaves and their metabolic activity as
well
Here A and B refer to Show Answer

Q367) Which plant performs photosynthesis even after the closing of stomata? Show Answer

Q368) During photorespiration, the conversion of phosphoglycolate to glycolate takes place in this cell organelle Show Answer

Q369) The chemical formula of starch is Show Answer

Q370) Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the
higher plants? Show Answer

Q371) CAM-plant among the following is Show Answer

Q372) Identify the 5-C compound from the given option Show Answer

Q373) The functions of chloroplast of membrane system is Show Answer

Q374) Photophosphorylation differs from oxidative phosphorylation in requiring input of energy in the from of Show Answer

Q375) Cyclic phosphorylation occurs at which wavelength Show Answer

Q376) If there is mutation in cytochrome system then this will Show Answer

Q377) Photosynthesis is correctly explained by the equation Show Answer

Q378) Which of the following elements are essential for the photolysis of water? Show Answer

Q379) The electrons in the reaction centre of PS-I are Show Answer

Q380) In plants, glycolate metabolism takes place in Show Answer

Q381) Chloroplast align themselves in the mesophyll cell in such away that their flat surface are Show Answer

Q382) How many molecules of RuBP are required to produce 20 molecules of serine in photorespiration? Show Answer

Q383) With reference to three Calvin cycles, which of the given options is correct for the following question?
I. How many gross PGAL molecules are produces?
II. Total, how many ATP molecules are required for synthesis of PGAL molecules?
II. Total, how many NADPH2 molecules are required for the synthesis of obtained PGAL molecules? Show Answer

Q384) CAM pathway is observed in Show Answer

Q385) Scientist believed that since the first product was …A… acid, the primary acceptor would be …B… carbon
compound; they spent many years trying to identify a 2-carbon compound before they discovered …C…
carbon compound (RuBP).
Complete the given statement with the correct combination of options Show Answer

Q386) I. Photosystem-I is a photosynthetic pigment system located on the appressed part of grana and thylakoids
II. Photosystem-II is a photosynthesis pigment located on the non-appressed part of stroma only
Identify wheather the given statements are correct or incorrect and choose the correct accordingly Show Answer

Q387) Biosynthetic phase is called as dark reaction because Show Answer

Q388) What percentage of solar radiation that hits the earth’s atmosphere ever reaches the surface? Show Answer

Q389) Photophosphorylation is the Show Answer

Q390) During photosynthesis Show Answer

Q391) Cytochrome oxidase is a/an Show Answer

Q392) Cytochrome oxidase contain Show Answer

Q393) Basic features of Kranz anatomy of C4-plant is presence of Show Answer

Q394) Photochemical reactions in the chloroplasts are directly involved in Show Answer

Q395) Which crop utilizes solar energy most efficiently? Show Answer

Q396) I. CO2 is assimilated into sugars
II. RUBP is regenerated
III. ATP and NADPH are formed
Select the correct option in context to Calvin cycle Show Answer

Q397) Majority of energy carrier molecules are oxidised or reduced in the Show Answer

Q398) The water splitting complex is associated with Show Answer

Q399) Photosystem I (PS-I) and Photosystem-II (PS-II) are named Show Answer

Q400) Asymmetric labeling of glucose phosphate formed in photosynthesis is called Show Answer

Q401) Protons produced by the splitting of water in light reaction of photosynthesis accumulates within the
reaction of photosynthesis accumulates within the Show Answer

Q402) The molecule present in the reaction centre of photosystem is Show Answer

Q403) Photorespiration is the light dependent reaction in which utilisation of Show Answer

Q404) Which photosynthetic pigment is called universal photosynthesis pigments? Show Answer

Q405) I. PS-I has more chlorophyll-a than chlorophyll-b
II. PS-II has more chlorophyll-b than chlorophyll-a
Choose the correct option Show Answer

Q406) Photosynthesis is a Show Answer

Q407) We are created by chloroplast. This statement suggest the idea Show Answer

Q408) Which of the following characteristics out of A, B and C are exhibited by C4-plants?
V. Kranz anatomy
VI. The product of photosynthesis is oxaloacetic acid
VII. Both PEP carboxylase and ribulose-bisphosphate carboxylase act as carboxylating enzymes Show Answer

Q409) Hexose monophosphate pathway takes place in Show Answer

Q410) The energy required to hydrolyse water during photosynthesis comes from Show Answer

Q411) Chloroplast dimorphism is a characteristic feature of Show Answer

Q412) The trapping centre of light energy in photosystem-I is Show Answer

Q413) ATP and NADPH produced in light reaction by the movement of electrons in ETC are used immediatly for Show Answer

Q414) Electrons which gets excited in PS-I must replaced. These replacement ultimately come from Show Answer

Q415) Select the correct pathway for electron transport during photosynthesis Show Answer

Q416) Photosynthesis is
I. Endergonic process
II. Exergonic process
III. Chemical process
IV. Physical process
Select the correct option Show Answer

Q417) In Z-scheme of light reaction the, participating pigment system are
I. PS-I II. PS-II III. PS-III
IV. Carotenoid and xanthophyll
Choose the correct option Show Answer

Q418) Function/s of accessory pigments is/are
I. They enable wider range of wavelength of incoming light for photosynthesis
II. They absorb light and transfer the energy to chlorophyll-a
III. They protect reaction centre from photo-oxidation
Select the correct option Show Answer

Q419) In CAM-plants, carbon dioxide required for photosynthesis enters the plant body during Show Answer

Q420) Water is Show Answer

Q421) Within the chloroplast, the chlorophyll pigments are organized in the form of Show Answer

Q422) Conversion of pyruvate into PEP takes place in Show Answer

Q423) What is the function performed by plant pigments? Show Answer

Q424) A reduction in the quantity of oxygen evolution during photosynthesis may be observed at Show Answer

Q425) Organelles associated with photorespiration are Show Answer

Q426) Stroma in the chloroplasts of higher plants contain Show Answer

Q427) Red light favours the …A… accumulation. Blue light favours the …B… accumulation
Here A and B refer to Show Answer

Q428) Maximum number of chloroplast are found in Show Answer

Q429) The net requirement of assimilatory power for the formation of 6 hexose molecules in maize plant is Show Answer

Q430) The form of pigment which promotes germination is Show Answer

Q431) Who proved that oxygen evolved in photosynthesis comes from water? Show Answer

Q432) Compensation point refers to Show Answer

Q433) Living organisms have the capability of extracting energy from Show Answer

Q434) Porphyrin is made up of how many pyrrole ring? Show Answer

Q435) In photorespiration, which is light induced cyclic oxidation of photosynthetic intermediates with the help
of oxygen, the substrate is Show Answer

Q436) Non-cyclic phosphorylation occurs in
I. stroma lamellae
II. grana lamellae
III. chloroplast membrane
Select the correct option Show Answer

Q437) Sugarcane show high efficiency of carbon dioxide fixation because of Show Answer

Q438) Photorespiration could easily be detected in Show Answer

Q439) Grana is ill developed or absent in the chloroplast in the Show Answer

Q440) Aldolase enzyme is present in Show Answer

Q441) Photosynthetic enhancement with flashing light was first observed by Show Answer

Q442) Synthesis of one molecule of glucose requires Show Answer

Q443) Wavelength of visible light/PAR is Show Answer

Q444) In Hatch and Slack pathway Show Answer

Q445) Photorespiration takes place only in Show Answer

Q446) Photochemical reactions in the chloroplast are directly involved in Show Answer

Q447) During non-cycle photophosphorylation, in which of the following 4e− produced through photolysis will
enter? Show Answer

Q448) Most abundant protein of biological world is Show Answer

Q449) Core of chlorophyll is formed by Show Answer

Q450) Ammonia release from Show Answer

Q451) Accessory pigments absorb light and transfer it to Show Answer

Q452) Formation of ATP in mitochondria is called Show Answer

Q453) Raphides are crystals of Show Answer

Q454) Nucleus/core of the chlorophyll contains Show Answer

Q455) ATP synthesis is linked to Show Answer

Q456) Which of the following is formed during photorespiration? Show Answer

Q457) Photosynthesis is maximum in Show Answer

Q458) Large number of chloroplast are present in which of the following cells? Show Answer

Q459) What is common between chloroplasts, chromoplasts and leucoplasts? Show Answer

Q460) Which of the following is true for photosynthesis? Show Answer

Q461) RuBisCo is found in Show Answer

Q462) ATPase has Show Answer

Q463) In dark reaction, regeneration of RuBP needs Show Answer

Q464) Rubisco has the active site that binds to Show Answer

Q465) Which statement about photosynthesis is false? Show Answer

Q466) Identify the incorrect statement with respect to Calvin cycle. Show Answer

Q467) NADP reductase enzyme is present on the Show Answer

Q468) Cyclic photophosphorylation links to Show Answer

Q469) Calvin cycle can be described under three stages. These stages are
I. carboxylation
II. ligation
III. reduction
IV. regeneration
Select the correct option Show Answer

Q470) In which of the following wavelengths, photosystem-I is inactive? Show Answer

Q471) Bacterial photosynthesis involves Show Answer

Q472) In photo system-I, the first electron acceptor is Show Answer

Q473) Energy is …A… to pump protons across a membrane, to create a gradient or high concentration of protons
within the thylakoid …B… ATPase has a channel that allows diffusion of protons back across the
membrane. This releases enough energy to activate …C… enzyme that catalyses the formation of ATP.
Complete the given NCERT statement by filling appropriate option in the given blanks Show Answer

Q474) Photosynthesis and respiration are similar because
I. in eukaryotes, both processes occur in specialised organelles
II. ATP synthesis in both is explained by chemiosmotic theory
III. both use ETC
Select the correct option Show Answer

Q475) Which one does not occur in cyclic photophosphorylation? Show Answer

Q476) ATP synthesised by cells in
I. chloroplast II. Mitochondria
III. Golgi body
Select the correct option Show Answer

Q477) 3-PGA is first stable product in Show Answer

Q478) Biosynthetic phase in photosynthesis is also called dark phase
Biosynthetic phase in photosynthesis is also called Blackman’s reaction Show Answer

Q479) Rate of photosynthesis is independent of duration of exposure of lig
At higher light intensities gradually rate of photosynthesis do not show further increase Show Answer

Q480) Under conditions of high light intensity and limited carbon dioxide supply,
photorespiration has a useful role in protecting the plants from photooxidative damage.
If enough carbon dioxide is not available to utilize light energy for carboxylation to
processed, the excess energy may not cause damage to plants. Show Answer

Q481) Photorespiration decreases net photosynthesis.
Rate of respiration in dark and light is almost same in all plants. Show Answer

Q482) Water splitting complex is associated with PS-II
Water splitting complex and PS-II both are physically located on the outer side of the
membrane of thylakoid Show Answer

Q483) C3-plant respond to lower CO2 concentration by showing increased rate of
photosynthesis
: C4-plant respond to higher CO2 concentration by showing decreased rate of
photosynthesis Show Answer

Q484) The atmospheric concentration of carbon dioxide at which photosynthesis just
components for respiration is referred to as carbon dioxide compensation point.
The carbon dioxide compensation point is reached when the amount of carbon dioxide
uptake is less than that generated through respiration because the level of carbon dioxide
in the atmosphere is more than that required for achieving carbon dioxide compensation
point. Show Answer

Q485) Cyclic pathway of photosynthesis first appeared in some eubacterial species.
: Oxygen started accumulating in the atmosphere after the non-cyclic pathway of
photosynthesis evolced. Show Answer

Q486) Which of the following statements about RuBisCO is true?
Show Answer

Q487) Which of the following are required for the light reaction of
Photosynthesis?
A. CO2
B. O2
C. H2O
D. Chlorophyll
E. Light
Choose the correct answer from the options given below: Show Answer

Q488) Which one of the following products diffuses out of the chloroplast
during photosynthesis? Show Answer

Q489) How many molecules of ATP and NADPH are required for every
molecule of CO2 fixed in the Calvin cycle? Show Answer

Q490) Which of the following are required for the dark reaction of
photosynthesis?
A. Light
B. Chlorophyll
C. CO2
D. ATP
E. NADPH
Choose the correct answer from the options given below: Show Answer

Q491) Given below are two statements:
Statement I: In C3 plants, some O2 binds to RuBisCO,
hence CO2 fixation is decreased.
Statement II: In C4 plants, mesophyll cells show very little
photorespiration while bundle sheath cells do not show
photorespiration.
In the light of the above statements, choose the correct answer from the
options given below: Show Answer

Q492) How many ATP and NADPH2 are required for the synthesis of one
molecule of Glucose during Calvin cycle? Show Answer

Q493) The reaction centre in PS II has an absorption maxima at Show Answer

Q494) Which of the following combinations is required for chemiosmosis? Show Answer

Q495) Given below are two statements :
Statement I :
RuBisCO is the most abundant enzyme in the world.
Statement II :
Photorespiration does not occur in C4 plants.
In the light of the above statements, choose the most appropriate
answer from the options given below : Show Answer

Q496) Which out of the following statements is incorrect? Show Answer

Q497) When one CO2 molecule is fixed as one molecule of triose phosphate,
which of the following photochemically made, high energy chemical
intermediates are used in the reduction phase? Show Answer

Q498) Identify the correct statements regarding chemiosmotic hypothesis:
(a) Splitting of the water molecule takes place on the inner side of the
membrane.
(b) Protons accumulate within the lumen of the thylakoids.
(c) Primary acceptor of electron transfers the electrons to an electron
carrier.
(d) NADP reductase enzyme is located on the stroma side of the
membrane.
(e) Protons increase in number in stroma.
Choose the correct answer from the options given below : Show Answer

Q499) Given below are two statements :
Statement I :
The primary CO2 acceptor in C4 plants is phosphoenolpyruvate and is
found in the mesophyll cells.
Statement II :
Mesophyll cells of C4 plants lack RuBisCo enzyme. In the light of the
above statements, choose the correct answer from the options given
below: Show Answer

Q500) Which one of the following is not true regarding the release of energy
during ATP synthesis through chemiosmosis? It involves: Show Answer

Q501) What is the role of large bundle sheath cells found around the vascular
bundles in C4 plants? Show Answer

Q502) The first stable product of CO2 fixation in Sorghum is Show Answer

Q503) Which of the following statements is incorrect? Show Answer

Q504) n light reaction, plastoquinone facilitates the transfer of electrons from Show Answer

Q505) The oxygenation activity of RuBisCo enzyme in photorespiration leads to
the formation of Show Answer

Q506) In Hatch and Slack pathway, the primary CO2 acceptor is Show Answer

Q507) Oxygen is not produced during photosynthesis by Show Answer

Q508) Which of the following is not a product of light reaction of
photosynthesis? Show Answer

Q509) With reference to factors affecting the rate of photosynthesis, which of
the following statements is not correct? Show Answer

Q510) Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in Show Answer

Q511) The process which makes major difference between C3 and C4 plants is Show Answer

Q512) Water vapour comes out from the plant leaf through the stomatal
opening. Through the same stomatal opening carbon dioxide diffuses
into the plant during photosynthesis. Reason out the above statements
using one of following options. Show Answer

Q513) In a chloroplast the highest number of protons are found in Show Answer

Q514) Emerson's enhancement effect and Red drop have been instrumental in
the discovery of Show Answer

Q515) A plant in your garden avoids photorespiratory losses, has improved
water use efficiency, shows high rates of photosynthesis at high
temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant? Show Answer

Q516) Water soluble pigments found in plant cell vacuoles are Show Answer

Q517) In photosynthesis, the light-independent reactions take place at Show Answer

Q518) Chromatophores take part in Show Answer