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) Quantosome contains: Show Answer


Q9) In the photosynthesis chlorophyll serves as: Show Answer


Q10) The first step in photosynthesis is: Show Answer


Q11) "Assimilatroy Power" is: Show Answer


Q12) The site of dark reaction in plastid is: Show Answer


Q13) The products of light reaction in photosynthesis are: Show Answer


Q14) Chloroplasts fix: Show Answer


Q15) All photosynthetic green plants contain: Show Answer


Q16) The principle of limiting factor was proposed by: Show Answer


Q17) The sequence of dark reaction of photosynthesis was discovered by: Show Answer


Q18) Photophosphorylation takes place: Show Answer


Q19) The process of conversion of light energy into chemical energy is called: Show Answer


Q20) Etiolated plants are formed due to lack of: Show Answer


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


Q22) In photosystem II, the trap centre of energy is: Show Answer


Q23) In photosynthesis, the sunlight: Show Answer


Q24) 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


Q25) The role of chlorophyll in photosynthesis is the absorption: Show Answer


Q26) The Hill (Light) reaction or photochemical phase of photosynthesis results in the production of: Show Answer


Q27) Photosynthesis is a: Show Answer


Q28) During photosynthesis, the function of solar energy is: Show Answer


Q29) What happens during photosynthetic phosphorylation? Show Answer


Q30) In a chloroplast, the site for light reaction is: Show Answer


Q31) Leaves appear green because they: Show Answer


Q32) The 1992 Noble Prize for the medicine was awarded to Edmond Fischer and Edwin Krebs for their work on: Show Answer


Q33) The leaves appear yellow when grown in: Show Answer


Q34) In the process of photosynthesis, the first step is: Show Answer


Q35) The substrate for photorespirationis: Show Answer


Q36) Chlorophyll 'a' is characterized by the side group of: Show Answer


Q37) During the Calvin cycle, sedoheptulose-1, 7-diphosphate is formed from: Show Answer


Q38) In plants synthesis of chlorophyll occurs in presence of: Show Answer


Q39) Persons who got Noble Prize for their work in photosynthesis are: Show Answer


Q40) Chlorophyll is soluble: Show Answer


Q41) The process of photophosphorylation was studied by: Show Answer


Q42) The 'Dark Reaction' in photosynthesis is called so because it: Show Answer


Q43) The corret formula of chlorophyll 'a' is: Show Answer


Q44) Agranal chloroplasts are a characteristic feature of one of the following: Show Answer


Q45) Which of the following is Hill Reaction: Show Answer


Q46) Photochemical reaction takes place in: Show Answer


Q47) The trapping centre of light energy in photosystem II is: Show Answer


Q48) Which pigment is absent in chloroplast? Show Answer


Q49) The plant which is used for study of photosynthesis research is: Show Answer


Q50) Chlorophyll absorbs: Show Answer


Q51) Discovery of Emerson effect has shown the existence of: Show Answer


Q52) Starch is detected in leaf: Show Answer


Q53) Cyclic phosphorylation produces: Show Answer


Q54) Maximal rates of photosynthesis are obtained in: Show Answer


Q55) The electron donor in the photosynthetic process taking place in the eukaryotic plants is: Show Answer


Q56) Which of the following enzymes is used for carboxylation of RuDP? Show Answer


Q57) Grana refers to: Show Answer


Q58) When a green cell transfers light energy into chemical energy which of the following reactions would take place? Show Answer


Q59) Starch containing plastids are termed: Show Answer


Q60) The electron carrier which in close association with photosynthetic pigment systems form an electron transport chain are: Show Answer


Q61) Chloroplast contains maximam quantity of: Show Answer


Q62) The process of photosynthesis is: Show Answer


Q63) The light energy used by the higher plants for photosynthesis is only about: Show Answer


Q64) Calvin used which plant to trace out the carbon path? Show Answer


Q65) Calvin cycle was investigated by the use of: Show Answer


Q66) Photorespiration is favoured by: Show Answer


Q67) Calvin cycle is: Show Answer


Q68) Photosynthesis rate per unit of light energy would be more in: Show Answer


Q69) What is the smallest photosynthetically functional unit? Show Answer


Q70) Photorespiration occurs in: Show Answer


Q71) Photosynthetic rate is independent of: Show Answer


Q72) Which one of the following is most appropriate reason for storing green coloured apples at low temperature? Show Answer


Q73) The specific function of light energy in photosynthesis process is to: Show Answer


Q74) Which of the following wavelengths of light is absorbed maximum for photosynthesis? Show Answer


Q75) Purple sulphur bacteria are: Show Answer


Q76) The connecting link between respiration and photosynthesis is: Show Answer


Q77) Which of the following is a Hill's reaction? Show Answer


Q78) The pigment that absorbs red and far red light in plants is: Show Answer


Q79) When PGA is changed into phosphoglyceraldehyde during photosynthesis, which of the following reactions occurs? Show Answer


Q80) During ATP synthesis, electrons pass through: Show Answer


Q81) 85-90% (or nine-tenth) of all the photosynthesis of the world is carried out by: Show Answer


Q82) Much of the statch is deposited in the banana fruit as it matures. Which of the following explains how the starch gets there? Show Answer


Q83) Food is transported to various parts of plants through: Show Answer


Q84) Translocation of sugar in flowering plant occurs in the form of: Show Answer


Q85) Which of the following trees would die quicker? Show Answer


Q86) Mass flow hypothesis regarding translocation of foods was given by: Show Answer


Q87) Presence of bicollateral vascular bundle provides evidence that conduction of food takes place through: Show Answer


Q88) The chemical composition of pigments, chlorophylls and carotenoids for the first time was given by: Show Answer


Q89) Which of the following colours of light work(s) least well for photosynthesis? Show Answer


Q90) Compensation point is: Show Answer


Q91) Melvin Calvin was awarded Noble Prize in: Show Answer


Q92) The process of respiration and photosynthesis have one thing in common, viz: Show Answer


Q93) First stable product of dark reaction in C_4 plants is: Show Answer


Q94) If the carbon dioxide content of the atmosphere is as high as 300 parts per million, plants: Show Answer


Q95) By placing a variegated leaf in the Moll's half leaf experiment, we can demonstrate the significance of: Show Answer


Q96) 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


Q97) The minimum rate of photosynthesis in the above experiment is seen in: Show Answer


Q98) 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


Q99) Van Helmont (1648) in his experiment with willow twig, would have probably realized that his conclusion was wrong, if he had: Show Answer


Q100) Pepco occurs in: Show Answer


Q101) The cytochromes participating in bacterial photosynthesis arae: Show Answer


Q102) The excited state of a pigment molecule lasts for: Show Answer


Q103) Photorespiration includes: Show Answer


Q104) Role of light in photosynthesis was discovered by: Show Answer


Q105) Which element is essential for photolysis of water? Show Answer


Q106) Assimilatory powers produced during photosynthesis are: Show Answer


Q107) Which of the following is present ar 3 carbon atom of II pyrrole ring of chlorophyll a molecule? Show Answer


Q108) Which of the following wavelengths is active in view of photosynthesis? Show Answer


Q109) The isotopes that have proved useful in researches on photosynthesis are: Show Answer


Q110) Non-cyclic photophosphorylation involves: Show Answer


Q111) Photophosphorylation means: Show Answer


Q112) Which one of the following is needed in both photosynthesis and respiration? Show Answer


Q113) Calvin cycle occurs in: Show Answer


Q114) Photolysis of water during photosynthesis occurs with the help of: Show Answer


Q115) The process of photosynthesis takes place in: Show Answer


Q116) Photosynthesis is a process by which the plants prepare food materials in the way: Show Answer


Q117) In which of the following plants type, both PEP carboxylase and RuBP carboxylase are present in the chloroplasts? Show Answer


Q118) Thylakoid bodies in the grana possess the photosynthesis units that are named as: Show Answer


Q119) The chlorophyll molecule has: Show Answer


Q120) Hill reaction in photosynthesis refers to: Show Answer


Q121) The alga which is used in researches of photosynthesis: Show Answer


Q122) Step of photosynthesis that requires direct light: Show Answer


Q123) Ferredoxin is: Show Answer


Q124) The Pigment present universally in all green oxygenic plants is: Show Answer


Q125) Carbon dioxide is fixed in: Show Answer


Q126) Direction of conduction of food through phloem is: Show Answer


Q127) Which of the following occurs in dark reaction of photosynthesis? Show Answer


Q128) First reaction in photosynthesis is: Show Answer


Q129) Chemical which absorbs light energy and changes it to chemical energy is: Show Answer


Q130) Which pair is wrong? Show Answer


Q131) Which pigment system is inactivated in red drop: Show Answer


Q132) Which plant is LDP: Show Answer


Q133) Proteinaceous pigment which controls the activites concerned with light is: Show Answer


Q134) Which one of the following is the aim of Moll's halfleaf experiment? Show Answer


Q135) Cyclic photophosphorylation form: Show Answer


Q136) Which of the following possess both PS - I and PS - II? Show Answer


Q137) Which of the following provides energy to ETS by absorption of sunlight? Show Answer


Q138) Photosystem II occurs in: Show Answer


Q139) ETS associated with photophosphorylation occurs in: Show Answer


Q140) Hill reaction occurs in: Show Answer


Q141) Which of the following is not an electron carrier? Show Answer


Q142) Who demonstrated photolysis of water by isolated chloroplasts? Show Answer


Q143) As compared to sun plants, plants adapted to low light intensity possess: Show Answer


Q144) Photosynthesis active radiation (PAR) has the following range of wavelengths: Show Answer


Q145) Pathway of Calvin cycle was discovered by using an isotope of: Show Answer


Q146) Chloroplast lacks: Show Answer


Q147) Bacterial photosynthesis does not show: Show Answer


Q148) Phenomenon which converts light energy into chemical energy is: Show Answer


Q149) In photosystem_I, the first electron acceptor is: Show Answer


Q150) The translocation of organic solutes in sieve tube members is supported by: Show Answer


Q151) Which of the following three organelles are involved in photorespiration? Show Answer


Q152) Which of the following is photophosphorylation? Show Answer


Q153) Electrons from excited chlorophyll molecule of photosystem II are accepted first by: Show Answer


Q154) CAM helps the plants in: Show Answer


Q155) The molecular formula of bacterio-chlorophyll a is: Show Answer


Q156) The main difference in two light reactions of photosynthesis is: Show Answer


Q157) The light reactions of photosynthesis are initiated by: Show Answer


Q158) According to recent Z-scheme, the electron released on behalf of PS II is accepted by: Show Answer


Q159) The gap electron of PS II is filled due to supply of electron from: Show Answer


Q160) The PS II is thought to be bound to: Show Answer


Q161) If isolated chloroplasts suspended in aqueous medium are supplied with inorganic phosphate, ADP, NADP are illuminated they show: Show Answer


Q162) Wilmott's bubbler is meant for proving: Show Answer


Q163) The sap that flows out of the stem comes from: Show Answer


Q164) Though potato tubers do not manufacture organic food, it is stored in them in large amounts. This is due to: Show Answer


Q165) A major drawback of Munch hypothesis is: Show Answer


Q166) 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


Q167) The cyclic electron pathway begins after: Show Answer


Q168) 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


Q169) 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


Q170) Which if the following is a simplified equation of photosynthesis? Show Answer


Q171) Proton gradient is broken down due to Show Answer


Q172) Which of the following is a simplified equation of photosynthesis? Show Answer


Q173) The membrane of thylakoid is called Show Answer


Q174) The law of limiting factors was proposed with particular reference to photosynthesis. Identify the
scientise, who proposed this law? Show Answer


Q175) The synthesis of one molecule of glucose during Calvin cycle requires Show Answer


Q176) In CAM-plants, carbon dioxide acceptor is Show Answer


Q177) Which factor is not limiting in normal condition for photosynthesis? Show Answer


Q178) PS is made up of which of the following? Show Answer


Q179) In higher plants, the shape of the chloroplast is Show Answer


Q180) Cyclic photophosphorylation produces Show Answer


Q181) I. Tomato
II. Black pepper
III. Mango
From the above option choose the correct answer in respect of green house crops Show Answer


Q182) Plastocyanin contains Show Answer


Q183) The two pigment system theory of photosynthesis was proposed by Show Answer


Q184) Which one of the following is not true about the light reactions of photosynthesis? Show Answer


Q185) By which plant pigment maximum absorption of radiation takes place in the blue and red regions of
absorption spectrum? Show Answer


Q186) 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


Q187) Kranz anatomy is a morphological diversity in the leaves of Show Answer


Q188) Which of the following is concerned with carbon dioxide fixation? Show Answer


Q189) Rubisco enzyme is absent in Show Answer


Q190) 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


Q191) Cyclic photophosphorylation results only in the Show Answer


Q192) Under normal condition, which one of the following is a major limiting factor? Show Answer


Q193) Which one is essential for the respiration as well as photosynthesis? Show Answer


Q194) Light Harvesting Complex (LHC) is Show Answer


Q195) Which of the following represents the correct molecular formula of chlorophyll-b ? Show Answer


Q196) 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


Q197) What is the wavelength of radiations in visible sectrum? Show Answer


Q198) Which of the following is not related to photorespiration? Show Answer


Q199) The internal factors that affects photosynthesis of plant depends on the Show Answer


Q200) Maximum photosynthesis occurs in Show Answer


Q201) Energy transfer in photosynthesis occurs as Show Answer


Q202) What is true for photosynthesis? Show Answer


Q203) Chlorophyll in chloroplasts is located in Show Answer


Q204) Which photosystem is involved in cyclic photophosphorylation? Show Answer


Q205) The mechanism of ATP formation both in chloroplast and mitochondria is explained by Show Answer


Q206) Absorption spectrum of chlorophyll-a and the action spectrum of photosynthesis is identical because
chlorophyll-a Show Answer


Q207) Which would do maximum harm to a tree? Show Answer


Q208) A wastage process is Show Answer


Q209) Choose the correct statement. Show Answer


Q210) Conditions helpful in photorespiration are Show Answer


Q211) In which of the following form glucose is usually stored in plants? Show Answer


Q212) Light energy in photosynthesis is utilized in Show Answer


Q213) Stroma lamellae membrane lacks
I. PS-II
II. NADP reductase
III. non-cyclic photophosphorylation
Select the correct option Show Answer


Q214) RUBISCO stands for Show Answer


Q215) In chloroplasts, chlorophyll is present in the Show Answer


Q216) DCMC Show Answer


Q217) Malic acid (4-C) is produced in which plant without Kranz anatomy? Show Answer


Q218) Generally, plants adapted to dry tropical conditions have Show Answer


Q219) Correct sequence of rate of photosynthesis in different light is Show Answer


Q220) During the light reaction, the water splits into Show Answer


Q221) Adenosine diphosphate contains Show Answer


Q222) The thylakoids are aggregated to form stalks of discs called Show Answer


Q223) Which hypothesis best explains the synthesis of ATP in chloroplast? Show Answer


Q224) The main photosynthetic pigments in the plants are Show Answer


Q225) Example of water soluble plant pigment is Show Answer


Q226) PS-I and PS-II were discovered by Show Answer


Q227) ‘Hatch and Slack’ cycle is found in Show Answer


Q228) Which of the following statements is true with regard to light reaction of photosynthetic mechanism in
plants? Show Answer


Q229) Photosynthesis convert radient or solar energy into the Show Answer


Q230) Photolysis of each water molecule in light reaction will yield Show Answer


Q231) Which of the following is the first compound that accepts carbon dioxide during dark phase of
photosynthesis? Show Answer


Q232) In a CAM-plant, the concentration of organic acid Show Answer


Q233) Phytochrome occurs is two forms. In which from it promotes the germination of seeds of some species? Show Answer


Q234) Solarisation is Show Answer


Q235) In which one of the following nitrogen is not a constituent? Show Answer


Q236) If a chemical process is affected by more than one factors then its rate will be determined by Show Answer


Q237) 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


Q238) Which activity is performed by PS-I in light reaction? Show Answer


Q239) 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


Q240) PEP is present in Show Answer


Q241) The absorption spectrum of chlorophyll Show Answer


Q242) PGA as the first carbon dioxide fixation product was discovered in photosynthesis of Show Answer


Q243) Which chemical compound/molecule supplies electrons continuously to PS-II? Show Answer


Q244) Colour that we see in leaves is due to the presence of
I. Chlorophyll-a II. Chlorophyll-b
III. Xanthophyll IV. Carotenoid Show Answer


Q245) Quantasomes occur on the surface of Show Answer


Q246) In Calvin cycle, if one molecule of RuBP is carboxylated than how many PGA molecule will be formed? Show Answer


Q247) The type of carbon dioxide fixation seen in many succulent plant species is Show Answer


Q248) Water stress causes the stomata to …A… hence reducing the …B… availability.
Here A and B refer to Show Answer


Q249) Photosynthesis cannot continue for long if during light reaction, only cyclic photophosphorylation takes
place. This is because Show Answer


Q250) Light reaction of photosynthesis occurs inside Show Answer


Q251) Bundle sheath cells are rich in which enzyme Show Answer


Q252) For yielding one molecule of glucose, the Calvin cycle turns Show Answer


Q253) The light reaction of photosynthesis end up in the formation of Show Answer


Q254) In leaves of C4-plants, malic acid synthesis during carbon dioxide fixation occurs in Show Answer


Q255) Biosynthetic phase of photosynthesis is the formation of Show Answer


Q256) What happen to the chloroplast pigment when they absorb light? Show Answer


Q257) Law of limiting factors was given by Show Answer


Q258) 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


Q259) The green-coloured pigment present in all autotrophs was named chlorophyll by Show Answer


Q260) Within the chloroplast, there is the membranous system consisting of
I. grana
II. stroma lamellae
III. fluid stroma
Choose the correct option Show Answer


Q261) 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


Q262) Organelles involved in photorespiration is/are
I. chloroplast
II. peroxisomes
III. mitochondria
Choose the correct option Show Answer


Q263) The first step in dark reaction of photosynthesis is Show Answer


Q264) Calvin cycle is also called Show Answer


Q265) Photosynthesis is an important process for life on earth because Show Answer


Q266) The mineral involved in the photolysis of water are
I Manganese II Calcium
III magnesium IV Chloride Show Answer


Q267) Calvin cycle represents Show Answer


Q268) 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


Q269) Etiolation in plants is caused when they Show Answer


Q270) Dichlorophenyl dimethylurea inhibits Show Answer


Q271) Photosynthetic pigments in chloroplast are embedded in the membrane of Show Answer


Q272) Pigments can be separated from leaf by Show Answer


Q273) In which of the following, oxygen does not evolve during photosynthesis? Show Answer


Q274) Who proved that the organic matter is synthesised from carbon dioxide and water during the
photosynthesis? Show Answer


Q275) Which of the following statements is true with regard to the light reaction of photosynthesis? Show Answer


Q276) In Calvin cycle, the first product identified was Show Answer


Q277) PS-I is located on the Show Answer


Q278) I. Chlorophyll-a
II. Chlorophyll-b
III. Anthocyanin
Select the correct option regarding water soluble pigment Show Answer


Q279) In the process of photosynthesis, water molecule breaks during Show Answer


Q280) In grana of chloroplast, the reaction ADP + Pi = ATP during day shows Show Answer


Q281) Very strong light has a direct inhibiting effect on photosynthesis, which is known as Show Answer


Q282) pH of thylakoid lumen during photosynthesis is Show Answer


Q283) 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


Q284) Members of family-Crassulaceae perform Show Answer


Q285) …A… plants have the higher temperature optimum than …B… the plants adapted climate
Here A and B refer to Show Answer


Q286) Which is not correct for ancient plants? Show Answer


Q287) Which of the following cell organelles is associated with photorespiration? Show Answer


Q288) The protons are transported across the thylakoid membrane into the lumen because Show Answer


Q289) The light phase of photosynthesis is called Show Answer


Q290) 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


Q291) In photosynthesis, what does occur in PS-II? Show Answer


Q292) Cyclic-photophosphorylation results in the formation of Show Answer


Q293) 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


Q294) Which one is the correct reaction of photosynthesis? Show Answer


Q295) 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


Q296) In photosynthesis, action and absorption spectrum were related by Show Answer


Q297) Which of the following is the formula of chlorophyll-a? Show Answer


Q298) Oxygen which is liberated during photosynthesis, comes from Show Answer


Q299) Photosynthetic organisms remove ……… of carbon/year if assumed that the photosynthetic organisms use
0.1% of incident visible light Show Answer


Q300) 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


Q301) Rate of photosynthesis is low in herbs, shurbs as compared to sun plants because Show Answer


Q302) PEPcase has an advantage over RuBisCo. The advantage is Show Answer


Q303) Activator of ribulose biphosphate carboxylase oxygenase is Show Answer


Q304) Which one of the following is wrong in relation to photorespiration? Show Answer


Q305) Flow of electrons in non-cyclic photo phosphorylation is Show Answer


Q306) Priestley discovered oxygen in Show Answer


Q307) Which of the following is wrongly matched? Show Answer


Q308) Transport of C4 acid from mesophyll cells to the bundle sheath cell takes place through Show Answer


Q309) Maximum amount of photosynthesis occurs in Show Answer


Q310) Sunken stomata are usually found in Show Answer


Q311) C3-plant show optimum photosynthesis at Show Answer


Q312) During C4-cycle, the acid formed are
I. Picric acid II. OAA
III. Malic acid IV. Aspartic acid
Select the correct option Show Answer


Q313) Presence of bundle sheath is a characteristic of Show Answer


Q314) Oxygenic photosynthesis occurs in Show Answer


Q315) 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


Q316) In which region, most of the photosynthesis takes place? Show Answer


Q317) 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


Q318) The components of PS-I are located on the Show Answer


Q319) Cyclic photophosphorylation occurs in Show Answer


Q320) 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


Q321) Identify from the following, a characteristic pigment, which contains copper containing protein Show Answer


Q322) Which of the following elements is an activator for both Ribulosebisphosphate carboxylase oxygenase and
phosphoenol pyruvate carboxylase in photosynthetic carbon fixation? Show Answer


Q323) Who experimentally proved that source of oxygen during photosynthesis is water? Show Answer


Q324) Warburg effect is the Show Answer


Q325) Oxaloacetic acid changes to the malic acid by the action of Show Answer


Q326) 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


Q327) When two photosystem (I and II) work in a series, the phosphorylation is called Show Answer


Q328) The ATPase enzyme consists of
I. F0 II. F1 III. F2
Select the correct option Show Answer


Q329) Chemiosmosis requires
I. a membrane
II. a proton pump
III. a proton gradient
Select the correct option Show Answer


Q330) Biosynthetic phase of photosynthesis is dependent on
I. NADPH II. NADH
III. ATP IV. NAD+ + H+ Show Answer


Q331) Kranz anatomy is the characteristics of Show Answer


Q332) In which type of reactions related to plant photosynthesis peroxisomes are involved? Show Answer


Q333) Photosynthesis is a Show Answer


Q334) 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


Q335) A chemical substance when irradiated with UV rays, absiorb radiations and emits visible light is called Show Answer


Q336) Chlorophyll-a and b differ in having Show Answer


Q337) Of the total incident solar radiation the proportion of PAR is Show Answer


Q338) Who discovered that light is essential for releasing oxygen in plants? Show Answer


Q339) How many Calvin cycles are required to produce 5 molecules of glucose? Show Answer


Q340) During light reaction of photosynthesis Show Answer


Q341) The ATP production in photosynthesis is called Show Answer


Q342) Who described the first action spectrum of photosynthesis? Show Answer


Q343) Who provided the evidence for the production of glucose when plant grows? Show Answer


Q344) Which of the following is used during discovery of Calvin cycle? Show Answer


Q345) The movement of electrons in ETC in light reaction is? Show Answer


Q346) The wavelength of light absorbed by Pr from of phytochrome is Show Answer


Q347) In C4- plants, the carbon dioxide fixation accurs in Show Answer


Q348) What is the name given to the flattened membranous sacs which are embedded in the matrix of the
chloroplast? Show Answer


Q349) Which of the following is maximum in chloroplast? Show Answer


Q350) Photolysis of water releases
I. electron
II. proton
III. oxygen
Select the correct option Show Answer


Q351) The Z scheme of electron transport is Show Answer


Q352) Photophosphorylation in chloroplast is most similar to the Show Answer


Q353) In photosynthesis, energy from light reaction to dark reaction is transferred in the form of Show Answer


Q354) RuBisCo performs oxygenase activity at Show Answer


Q355) In bundle, sheath cells are the large cells around the Show Answer


Q356) Number of carboxylation occurs in Calvin cycle is Show Answer


Q357) Plants adapted to low light intensity have Show Answer


Q358) The first action spectrum of photosynthesis was described by Engelman was related to Show Answer


Q359) To form one molecule of glyceraldehydes phosphate in Calvin cycle Show Answer


Q360) Light compensation point is the point where Show Answer


Q361) During photorespiration, the oxygen consuming reaction(s) occur in Show Answer


Q362) Which one of the following concerns Photophosphorylation? Show Answer


Q363) 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


Q364) If the light becomes unavailable during photosynthesis then Show Answer


Q365) 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


Q366) Chloroplasts without grana are known to occur in Show Answer


Q367) PGA, the first carbon dioxide fixation product was firstly discovered in Show Answer


Q368) Liberation of oxygen when green cells in water are exposed to sunlight in presence of suitable acceptor is
called Show Answer


Q369) 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


Q370) ………….. Is a CAM plant. Show Answer


Q371) Proton gradient is very important across the membrane because Show Answer


Q372) The first acceptor of electrons from an excited chlorophyll molecule of
Photo system-II is Show Answer


Q373) Substance which is essential for the respiration as well as photosynthesis is Show Answer


Q374) Which of the following is a 4-carbon compound? Show Answer


Q375) 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


Q376) 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


Q377) Which plant performs photosynthesis even after the closing of stomata? Show Answer


Q378) During photorespiration, the conversion of phosphoglycolate to glycolate takes place in this cell organelle Show Answer


Q379) The chemical formula of starch is Show Answer


Q380) Emerson effect explain the phenomenon of Show Answer


Q381) Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the
higher plants? Show Answer


Q382) CAM-plant among the following is Show Answer


Q383) Identify the 5-C compound from the given option Show Answer


Q384) The functions of chloroplast of membrane system is Show Answer


Q385) Photophosphorylation differs from oxidative phosphorylation in requiring input of energy in the from of Show Answer


Q386) Cyclic phosphorylation occurs at which wavelength Show Answer


Q387) If there is mutation in cytochrome system then this will Show Answer


Q388) Photosynthesis is correctly explained by the equation Show Answer


Q389) Which of the following elements are essential for the photolysis of water? Show Answer


Q390) The electrons in the reaction centre of PS-I are Show Answer


Q391) In plants, glycolate metabolism takes place in Show Answer


Q392) Chloroplast align themselves in the mesophyll cell in such away that their flat surface are Show Answer


Q393) How many molecules of RuBP are required to produce 20 molecules of serine in photorespiration? Show Answer


Q394) 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


Q395) CAM pathway is observed in Show Answer


Q396) 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


Q397) 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


Q398) Biosynthetic phase is called as dark reaction because Show Answer


Q399) What percentage of solar radiation that hits the earth’s atmosphere ever reaches the surface? Show Answer


Q400) Photophosphorylation is the Show Answer


Q401) During photosynthesis Show Answer


Q402) Cytochrome oxidase is a/an Show Answer


Q403) Cytochrome oxidase contain Show Answer


Q404) Basic features of Kranz anatomy of C4-plant is presence of Show Answer


Q405) Photochemical reactions in the chloroplasts are directly involved in Show Answer


Q406) Which crop utilizes solar energy most efficiently? Show Answer


Q407) 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


Q408) Majority of energy carrier molecules are oxidised or reduced in the Show Answer


Q409) The water splitting complex is associated with Show Answer


Q410) Photosystem I (PS-I) and Photosystem-II (PS-II) are named Show Answer


Q411) Asymmetric labeling of glucose phosphate formed in photosynthesis is called Show Answer


Q412) Protons produced by the splitting of water in light reaction of photosynthesis accumulates within the
reaction of photosynthesis accumulates within the Show Answer


Q413) The molecule present in the reaction centre of photosystem is Show Answer


Q414) Photorespiration is the light dependent reaction in which utilisation of Show Answer


Q415) Which photosynthetic pigment is called universal photosynthesis pigments? Show Answer


Q416) 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


Q417) Photosynthesis is a Show Answer


Q418) We are created by chloroplast. This statement suggest the idea Show Answer


Q419) 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


Q420) Hexose monophosphate pathway takes place in Show Answer


Q421) The energy required to hydrolyse water during photosynthesis comes from Show Answer


Q422) Chloroplast dimorphism is a characteristic feature of Show Answer


Q423) The trapping centre of light energy in photosystem-I is Show Answer


Q424) ATP and NADPH produced in light reaction by the movement of electrons in ETC are used immediatly for Show Answer


Q425) Electrons which gets excited in PS-I must replaced. These replacement ultimately come from Show Answer


Q426) Select the correct pathway for electron transport during photosynthesis Show Answer


Q427) Photosynthesis is
I. Endergonic process
II. Exergonic process
III. Chemical process
IV. Physical process
Select the correct option Show Answer


Q428) 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


Q429) 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


Q430) In CAM-plants, carbon dioxide required for photosynthesis enters the plant body during Show Answer


Q431) Water is Show Answer


Q432) Within the chloroplast, the chlorophyll pigments are organized in the form of Show Answer


Q433) Conversion of pyruvate into PEP takes place in Show Answer


Q434) What is the function performed by plant pigments? Show Answer


Q435) A reduction in the quantity of oxygen evolution during photosynthesis may be observed at Show Answer


Q436) Organelles associated with photorespiration are Show Answer


Q437) Stroma in the chloroplasts of higher plants contain Show Answer


Q438) Red light favours the …A… accumulation. Blue light favours the …B… accumulation
Here A and B refer to Show Answer


Q439) Maximum number of chloroplast are found in Show Answer


Q440) The net requirement of assimilatory power for the formation of 6 hexose molecules in maize plant is Show Answer


Q441) The form of pigment which promotes germination is Show Answer


Q442) Who proved that oxygen evolved in photosynthesis comes from water? Show Answer


Q443) Compensation point refers to Show Answer


Q444) Living organisms have the capability of extracting energy from Show Answer


Q445) Porphyrin is made up of how many pyrrole ring? Show Answer


Q446) In photorespiration, which is light induced cyclic oxidation of photosynthetic intermediates with the help
of oxygen, the substrate is Show Answer


Q447) Non-cyclic phosphorylation occurs in
I. stroma lamellae
II. grana lamellae
III. chloroplast membrane
Select the correct option Show Answer


Q448) Sugarcane show high efficiency of carbon dioxide fixation because of Show Answer


Q449) Malic acid or aspartic acid and oxaloacetic acid both are found in Show Answer


Q450) Photorespiration could easily be detected in Show Answer


Q451) Grana is ill developed or absent in the chloroplast in the Show Answer


Q452) Aldolase enzyme is present in Show Answer


Q453) Photosynthetic enhancement with flashing light was first observed by Show Answer


Q454) Synthesis of one molecule of glucose requires Show Answer


Q455) Wavelength of visible light/PAR is Show Answer


Q456) In Hatch and Slack pathway Show Answer


Q457) Photorespiration takes place only in Show Answer


Q458) Photochemical reactions in the chloroplast are directly involved in Show Answer


Q459) During non-cycle photophosphorylation, in which of the following 4e− produced through photolysis will
enter? Show Answer


Q460) Most abundant protein of biological world is Show Answer


Q461) Core of chlorophyll is formed by Show Answer


Q462) Ammonia release from Show Answer


Q463) Accessory pigments absorb light and transfer it to Show Answer


Q464) Formation of ATP in mitochondria is called Show Answer


Q465) Raphides are crystals of Show Answer


Q466) Nucleus/core of the chlorophyll contains Show Answer


Q467) ATP synthesis is linked to Show Answer


Q468) Which of the following is formed during photorespiration? Show Answer


Q469) Photosynthesis is maximum in Show Answer


Q470) Large number of chloroplast are present in which of the following cells? Show Answer


Q471) What is common between chloroplasts, chromoplasts and leucoplasts? Show Answer


Q472) Which of the following is true for photosynthesis? Show Answer


Q473) RuBisCo is found in Show Answer


Q474) ATPase has Show Answer


Q475) In dark reaction, regeneration of RuBP needs Show Answer


Q476) Rubisco has the active site that binds to Show Answer


Q477) Which statement about photosynthesis is false? Show Answer


Q478) Identify the incorrect statement with respect to Calvin cycle. Show Answer


Q479) NADP reductase enzyme is present on the Show Answer


Q480) Cyclic photophosphorylation links to Show Answer


Q481) In photorespiration, what is the role of peroxisome? Show Answer


Q482) 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


Q483) In which of the following wavelengths, photosystem-I is inactive? Show Answer


Q484) Bacterial photosynthesis involves Show Answer


Q485) In photo system-I, the first electron acceptor is Show Answer


Q486) 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


Q487) 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


Q488) Which one does not occur in cyclic photophosphorylation? Show Answer


Q489) Quantum yield of photosynthesis is Show Answer


Q490) ATP synthesised by cells in
I. chloroplast II. Mitochondria
III. Golgi body
Select the correct option Show Answer


Q491) 3-PGA is first stable product in Show Answer


Q492) Biosynthetic phase in photosynthesis is also called dark phase
Biosynthetic phase in photosynthesis is also called Blackman’s reaction Show Answer


Q493) 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


Q494) Rhoeo leaves contain anthocyanin pigments in epidermal cells
Anthocyanins are accessory photosynthetic pigments. Show Answer


Q495) 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


Q496) Photorespiration decreases net photosynthesis.
Rate of respiration in dark and light is almost same in all plants. Show Answer


Q497) 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


Q498) 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


Q499) 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


Q500) 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