Practice Test

1) Engelmann's experiment with Spirogyra demonstrated that:

2) Red and blue light support the highest rates of synthesis because:

3) The role of phycobilins in photosynthesis is to:

4) A cell that lacks chloroplast does not:

5) Energy is transferred from the light reaction step to the dark reaction step by:

6) In photosynthesis the oxygen evolved and oxygen in glucose come from:

7) Algae float in the water during day time and sink during night time because:

8) Quantosome contains:

9) In the photosynthesis chlorophyll serves as:

10) The first step in photosynthesis is:

11) "Assimilatroy Power" is:

12) The site of dark reaction in plastid is:

13) The products of light reaction in photosynthesis are:

14) Chloroplasts fix:

15) All photosynthetic green plants contain:

16) The principle of limiting factor was proposed by:

17) The sequence of dark reaction of photosynthesis was discovered by:

18) Photophosphorylation takes place:

19) The process of conversion of light energy into chemical energy is called:

20) Etiolated plants are formed due to lack of:

21) In photosystem I, the trap centre of energy is:

22) In photosystem II, the trap centre of energy is:

23) In photosynthesis, the sunlight:

24) 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:

25) The role of chlorophyll in photosynthesis is the absorption:

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

27) Photosynthesis is a:

28) During photosynthesis, the function of solar energy is:

29) What happens during photosynthetic phosphorylation?

30) In a chloroplast, the site for light reaction is:

31) Leaves appear green because they:

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

33) The leaves appear yellow when grown in:

34) In the process of photosynthesis, the first step is:

35) The substrate for photorespirationis:

36) Chlorophyll 'a' is characterized by the side group of:

37) During the Calvin cycle, sedoheptulose-1, 7-diphosphate is formed from:

38) In plants synthesis of chlorophyll occurs in presence of:

39) Persons who got Noble Prize for their work in photosynthesis are:

40) Chlorophyll is soluble:

41) The process of photophosphorylation was studied by:

42) The 'Dark Reaction' in photosynthesis is called so because it:

43) The corret formula of chlorophyll 'a' is:

44) Agranal chloroplasts are a characteristic feature of one of the following:

45) Which of the following is Hill Reaction:

46) Photochemical reaction takes place in:

47) The trapping centre of light energy in photosystem II is:

48) Which pigment is absent in chloroplast?

49) The plant which is used for study of photosynthesis research is:

50) Chlorophyll absorbs:

51) Discovery of Emerson effect has shown the existence of:

52) Starch is detected in leaf:

53) Cyclic phosphorylation produces:

54) Maximal rates of photosynthesis are obtained in:

55) The electron donor in the photosynthetic process taking place in the eukaryotic plants is:

56) Which of the following enzymes is used for carboxylation of RuDP?

57) Grana refers to:

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

59) Starch containing plastids are termed:

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

61) Chloroplast contains maximam quantity of:

62) The process of photosynthesis is:

63) The light energy used by the higher plants for photosynthesis is only about:

64) Calvin used which plant to trace out the carbon path?

65) Calvin cycle was investigated by the use of:

66) Photorespiration is favoured by:

67) Calvin cycle is:

68) Photosynthesis rate per unit of light energy would be more in:

69) What is the smallest photosynthetically functional unit?

70) Photorespiration occurs in:

71) Photosynthetic rate is independent of:

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

73) The specific function of light energy in photosynthesis process is to:

74) Which of the following wavelengths of light is absorbed maximum for photosynthesis?

75) Purple sulphur bacteria are:

76) The connecting link between respiration and photosynthesis is:

77) Which of the following is a Hill's reaction?

78) The pigment that absorbs red and far red light in plants is:

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

80) During ATP synthesis, electrons pass through:

81) 85-90% (or nine-tenth) of all the photosynthesis of the world is carried out by:

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

83) Food is transported to various parts of plants through:

84) Translocation of sugar in flowering plant occurs in the form of:

85) Which of the following trees would die quicker?

86) Mass flow hypothesis regarding translocation of foods was given by:

87) Presence of bicollateral vascular bundle provides evidence that conduction of food takes place through:

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

89) Which of the following colours of light work(s) least well for photosynthesis?

90) Compensation point is:

91) Melvin Calvin was awarded Noble Prize in:

92) The process of respiration and photosynthesis have one thing in common, viz:

93) First stable product of dark reaction in C_4 plants is:

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

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

96) 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:

97) The minimum rate of photosynthesis in the above experiment is seen in:

98) 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?

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

100) Pepco occurs in:

101) The cytochromes participating in bacterial photosynthesis arae:

102) The excited state of a pigment molecule lasts for:

103) Photorespiration includes:

104) Role of light in photosynthesis was discovered by:

105) Which element is essential for photolysis of water?

106) Photorespiration takes place only in:

107) Assimilatory powers produced during photosynthesis are:

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

109) Which of the following wavelengths is active in view of photosynthesis?

110) Photorespiration is favoured by:

111) The isotopes that have proved useful in researches on photosynthesis are:

112) Non-cyclic photophosphorylation involves:

113) Photophosphorylation means:

114) Which one of the following is needed in both photosynthesis and respiration?

115) Chlorophyll is soluble in:

116) Calvin cycle occurs in:

117) Photolysis of water during photosynthesis occurs with the help of:

118) The process of photosynthesis takes place in:

119) Photosynthesis is a process by which the plants prepare food materials in the way:

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

121) Thylakoid bodies in the grana possess the photosynthesis units that are named as:

122) The chlorophyll molecule has:

123) Hill reaction in photosynthesis refers to:

124) The alga which is used in researches of photosynthesis:

125) Step of photosynthesis that requires direct light:

126) Ferredoxin is:

127) The Pigment present universally in all green oxygenic plants is:

128) Carbon dioxide is fixed in:

129) Direction of conduction of food through phloem is:

130) Which of the following occurs in dark reaction of photosynthesis?

131) First reaction in photosynthesis is:

132) Chemical which absorbs light energy and changes it to chemical energy is:

133) Which pair is wrong?

134) Which pigment system is inactivated in red drop:

135) Which plant is LDP:

136) Proteinaceous pigment which controls the activites concerned with light is:

137) Which one of the following is the aim of Moll's halfleaf experiment?

138) Photosynthesis is maximum in:

139) Cyclic photophosphorylation form:

140) Which of the following possess both PS - I and PS - II?

141) Which of the following provides energy to ETS by absorption of sunlight?

142) Photosystem II occurs in:

143) ETS associated with photophosphorylation occurs in:

144) Hill reaction occurs in:

145) Which of the following is not an electron carrier?

146) Who demonstrated photolysis of water by isolated chloroplasts?

147) As compared to sun plants, plants adapted to low light intensity possess:

148) Photosynthesis active radiation (PAR) has the following range of wavelengths:

149) Pathway of Calvin cycle was discovered by using an isotope of:

150) Chloroplast lacks:

151) Bacterial photosynthesis does not show:

152) Phenomenon which converts light energy into chemical energy is:

153) In photosystem_I, the first electron acceptor is:

154) The translocation of organic solutes in sieve tube members is supported by:

155) During photorespiration, the oxygen consuming reaction (s) occur in:

156) The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is:

157) Which of the following three organelles are involved in photorespiration?

158) Which of the following is photophosphorylation?

159) Electrons from excited chlorophyll molecule of photosystem II are accepted first by:

160) CAM helps the plants in:

161) The molecular formula of bacterio-chlorophyll a is:

162) The main difference in two light reactions of photosynthesis is:

163) The light reactions of photosynthesis are initiated by:

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

165) The gap electron of PS II is filled due to supply of electron from:

166) The PS II is thought to be bound to:

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

168) Wilmott's bubbler is meant for proving:

169) The sap that flows out of the stem comes from:

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

171) A major drawback of Munch hypothesis is:

172) 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:

173) The cyclic electron pathway begins after:

174) 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.

175) 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

176) Which if the following is a simplified equation of photosynthesis?

177) Proton gradient is broken down due to

178) Which of the following is a simplified equation of photosynthesis?

179) The membrane of thylakoid is called

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

181) The synthesis of one molecule of glucose during Calvin cycle requires

182) In CAM-plants, carbon dioxide acceptor is

183) Which factor is not limiting in normal condition for photosynthesis?

184) PS is made up of which of the following?

185) In higher plants, the shape of the chloroplast is

186) Cyclic photophosphorylation produces

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

188) Plastocyanin contains

189) The two pigment system theory of photosynthesis was proposed by

190) Which one of the following is not true about the light reactions of photosynthesis?

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

192) 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

193) Kranz anatomy is a morphological diversity in the leaves of

194) Which of the following is concerned with carbon dioxide fixation?

195) Rubisco enzyme is absent in

196) 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

197) Cyclic photophosphorylation results only in the

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

199) Which one is essential for the respiration as well as photosynthesis?

200) Light Harvesting Complex (LHC) is

201) Which of the following represents the correct molecular formula of chlorophyll-b ?

202) 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

203) What is the wavelength of radiations in visible sectrum?

204) Which of the following is not related to photorespiration?

205) The internal factors that affects photosynthesis of plant depends on the

206) Maximum photosynthesis occurs in

207) Energy transfer in photosynthesis occurs as

208) What is true for photosynthesis?

209) Chlorophyll in chloroplasts is located in

210) Which photosystem is involved in cyclic photophosphorylation?

211) The mechanism of ATP formation both in chloroplast and mitochondria is explained by

212) Absorption spectrum of chlorophyll-a and the action spectrum of photosynthesis is identical because

213) Which would do maximum harm to a tree?

214) A wastage process is

215) Choose the correct statement.

216) Conditions helpful in photorespiration are

217) In which of the following form glucose is usually stored in plants?

218) Light energy in photosynthesis is utilized in

219) Stroma lamellae membrane lacks
II. NADP reductase
III. non-cyclic photophosphorylation
Select the correct option

220) RUBISCO stands for

221) In chloroplasts, chlorophyll is present in the

222) DCMC

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

224) Generally, plants adapted to dry tropical conditions have

225) Correct sequence of rate of photosynthesis in different light is

226) During the light reaction, the water splits into

227) Adenosine diphosphate contains

228) The thylakoids are aggregated to form stalks of discs called

229) Which hypothesis best explains the synthesis of ATP in chloroplast?

230) The chemiosmotic hypothesis explains the ATP
synthesis mechanism. Like in respiration, in
photosynthesis too, ATP synthesis is linked to the
development of proton gradient across the
membrane. This time these are the membranes of
the thylakoid. There is one difference that in
photosynthesis the proton accumulation is
towards the inside of membrane, i.e., in the lumen.
In respiration, proton accumulate in the
intermembrane of the mitochondria when
electrons move through the ETS (Electron
Transport System)

231) The main photosynthetic pigments in the plants are

232) Example of water soluble plant pigment is

233) PS-I and PS-II were discovered by

234) ‘Hatch and Slack’ cycle is found in

235) Which of the following statements is true with regard to light reaction of photosynthetic mechanism in

236) Photosynthesis convert radient or solar energy into the

237) Photolysis of each water molecule in light reaction will yield

238) Which of the following is the first compound that accepts carbon dioxide during dark phase of

239) In a CAM-plant, the concentration of organic acid

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

241) Solarisation is

242) In which one of the following nitrogen is not a constituent?

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

244) 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

245) Which activity is performed by PS-I in light reaction?

246) A scientist disrupted the chloroplast and separated the stroma from lamella. For fixing CO2 he supplied
stroma with
III. Glucose
Select the correct option

247) PEP is present in

248) The absorption spectrum of chlorophyll

249) PGA as the first carbon dioxide fixation product was discovered in photosynthesis of

250) Which chemical compound/molecule supplies electrons continuously to PS-II?

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

252) Quantasomes occur on the surface of

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

254) The type of carbon dioxide fixation seen in many succulent plant species is

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

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

257) Light reaction of photosynthesis occurs inside

258) Bundle sheath cells are rich in which enzyme

259) For yielding one molecule of glucose, the Calvin cycle turns

260) The light reaction of photosynthesis end up in the formation of

261) The light reaction of photosynthesis end up in the formation of

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

263) Biosynthetic phase of photosynthesis is the formation of

264) What happen to the chloroplast pigment when they absorb light?

265) Law of limiting factors was given by

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

267) The green-coloured pigment present in all autotrophs was named chlorophyll by

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

269) 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?

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

271) The first step in dark reaction of photosynthesis is

272) Calvin cycle is also called

273) Photosynthesis is an important process for life on earth because

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

275) Calvin cycle represents

276) 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

277) Etiolation in plants is caused when they

278) Dichlorophenyl dimethylurea inhibits

279) Photosynthetic pigments in chloroplast are embedded in the membrane of

280) Pigments can be separated from leaf by

281) In which of the following, oxygen does not evolve during photosynthesis?

282) Who proved that the organic matter is synthesised from carbon dioxide and water during the

283) Which of the following statements is true with regard to the light reaction of photosynthesis?

284) In Calvin cycle, the first product identified was

285) PS-I is located on the

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

287) In the process of photosynthesis, water molecule breaks during

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

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

290) pH of thylakoid lumen during photosynthesis is

291) 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

292) Members of family-Crassulaceae perform

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

294) Which is not correct for ancient plants?

295) Which of the following cell organelles is associated with photorespiration?

296) The protons are transported across the thylakoid membrane into the lumen because

297) The light phase of photosynthesis is called

298) 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

299) In photosynthesis, what does occur in PS-II?

300) Cyclic-photophosphorylation results in the formation of

301) 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

302) Which one is the correct reaction of photosynthesis?

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

304) In photosynthesis, action and absorption spectrum were related by

305) Which of the following is the formula of chlorophyll-a?

306) Oxygen which is liberated during photosynthesis, comes from

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

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

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

310) PEPcase has an advantage over RuBisCo. The advantage is

311) Activator of ribulose biphosphate carboxylase oxygenase is

312) Which one of the following is wrong in relation to photorespiration?

313) Flow of electrons in non-cyclic photo phosphorylation is

314) Priestley discovered oxygen in

315) Which of the following is wrongly matched?

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

317) Maximum amount of photosynthesis occurs in

318) Sunken stomata are usually found in

319) C3-plant show optimum photosynthesis at

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

321) Presence of bundle sheath is a characteristic of

322) Oxygenic photosynthesis occurs in

323) 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

324) In which region, most of the photosynthesis takes place?

325) 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?

326) The components of PS-I are located on the

327) Cyclic photophosphorylation occurs in

328) 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?

329) Identify from the following, a characteristic pigment, which contains copper containing protein

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

331) Who experimentally proved that source of oxygen during photosynthesis is water?

332) Warburg effect is the

333) Oxaloacetic acid changes to the malic acid by the action of

334) 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.

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

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

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

338) Biosynthetic phase of photosynthesis is dependent on

339) Kranz anatomy is the characteristics of

340) In which type of reactions related to plant photosynthesis peroxisomes are involved?

341) Photosynthesis is a

342) 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

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

344) Chlorophyll-a and b differ in having

345) Of the total incident solar radiation the proportion of PAR is

346) Who discovered that light is essential for releasing oxygen in plants?

347) How many Calvin cycles are required to produce 5 molecules of glucose?

348) During light reaction of photosynthesis

349) The ATP production in photosynthesis is called

350) Who described the first action spectrum of photosynthesis?

351) Who provided the evidence for the production of glucose when plant grows?

352) Which of the following is used during discovery of Calvin cycle?

353) The movement of electrons in ETC in light reaction is?

354) The wavelength of light absorbed by Pr from of phytochrome is

355) In C4- plants, the carbon dioxide fixation accurs in

356) What is the name given to the flattened membranous sacs which are embedded in the matrix of the

357) Which of the following is maximum in chloroplast?

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

359) The Z scheme of electron transport is

360) Photophosphorylation in chloroplast is most similar to the

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

362) RuBisCo performs oxygenase activity at

363) In bundle, sheath cells are the large cells around the

364) Which of the following is the first compound that accepts carbon dioxide during dark phase of

365) Number of carboxylation occurs in Calvin cycle is

366) Plants adapted to low light intensity have

367) The first action spectrum of photosynthesis was described by Engelman was related to

368) To form one molecule of glyceraldehydes phosphate in Calvin cycle

369) Light compensation point is the point where

370) During photorespiration, the oxygen consuming reaction(s) occur in

371) Which one of the following concerns Photophosphorylation?

372) 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?

373) If the light becomes unavailable during photosynthesis then

374) 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

375) Chloroplasts without grana are known to occur in

376) PGA, the first carbon dioxide fixation product was firstly discovered in

377) Liberation of oxygen when green cells in water are exposed to sunlight in presence of suitable acceptor is

378) 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

379) ………….. Is a CAM plant.

380) Proton gradient is very important across the membrane because

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

382) Substance which is essential for the respiration as well as photosynthesis is

383) Which of the following is a 4-carbon compound?

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

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

386) Which plant performs photosynthesis even after the closing of stomata?

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

388) The chemical formula of starch is

389) Emerson effect explain the phenomenon of

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

391) CAM-plant among the following is

392) Identify the 5-C compound from the given option

393) The functions of chloroplast of membrane system is

394) Photophosphorylation differs from oxidative phosphorylation in requiring input of energy in the from of

395) Cyclic phosphorylation occurs at which wavelength

396) If there is mutation in cytochrome system then this will

397) Photosynthesis is correctly explained by the equation

398) Which of the following elements are essential for the photolysis of water?

399) The electrons in the reaction centre of PS-I are

400) In plants, glycolate metabolism takes place in

401) Chloroplast align themselves in the mesophyll cell in such away that their flat surface are

402) How many molecules of RuBP are required to produce 20 molecules of serine in photorespiration?

403) 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?

404) CAM pathway is observed in

405) 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

406) 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

407) Biosynthetic phase is called as dark reaction because

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

409) Photophosphorylation is the

410) During photosynthesis

411) Cytochrome oxidase is a/an

412) Cytochrome oxidase contain

413) Basic features of Kranz anatomy of C4-plant is presence of

414) Photochemical reactions in the chloroplasts are directly involved in

415) Which crop utilizes solar energy most efficiently?

416) 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

417) Majority of energy carrier molecules are oxidised or reduced in the

418) The water splitting complex is associated with

419) Photosystem I (PS-I) and Photosystem-II (PS-II) are named

420) Asymmetric labeling of glucose phosphate formed in photosynthesis is called

421) Protons produced by the splitting of water in light reaction of photosynthesis accumulates within the
reaction of photosynthesis accumulates within the

422) The molecule present in the reaction centre of photosystem is

423) Photorespiration is the light dependent reaction in which utilisation of

424) Which photosynthetic pigment is called universal photosynthesis pigments?

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

426) Photosynthesis is a

427) We are created by chloroplast. This statement suggest the idea

428) 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

429) Hexose monophosphate pathway takes place in

430) The energy required to hydrolyse water during photosynthesis comes from

431) Chloroplast dimorphism is a characteristic feature of

432) The trapping centre of light energy in photosystem-I is

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

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

435) Select the correct pathway for electron transport during photosynthesis

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

437) Compensation point refers to

438) In Z-scheme of light reaction the, participating pigment system are
IV. Carotenoid and xanthophyll
Choose the correct option

439) 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

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

441) Water is

442) Within the chloroplast, the chlorophyll pigments are organized in the form of

443) Conversion of pyruvate into PEP takes place in

444) What is the function performed by plant pigments?

445) A reduction in the quantity of oxygen evolution during photosynthesis may be observed at

446) Organelles associated with photorespiration are

447) Stroma in the chloroplasts of higher plants contain

448) Red light favours the …A… accumulation. Blue light favours the …B… accumulation
Here A and B refer to

449) Maximum number of chloroplast are found in

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

451) The form of pigment which promotes germination is

452) Who proved that oxygen evolved in photosynthesis comes from water?

453) Compensation point refers to

454) Living organisms have the capability of extracting energy from

455) Porphyrin is made up of how many pyrrole ring?

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

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

458) Sugarcane show high efficiency of carbon dioxide fixation because of

459) Malic acid or aspartic acid and oxaloacetic acid both are found in

460) Photorespiration could easily be detected in

461) Grana is ill developed or absent in the chloroplast in the

462) Aldolase enzyme is present in

463) Photosynthetic enhancement with flashing light was first observed by

464) Synthesis of one molecule of glucose requires

465) Wavelength of visible light/PAR is

466) In Hatch and Slack pathway

467) Photorespiration takes place only in

468) Photochemical reactions in the chloroplast are directly involved in

469) During non-cycle photophosphorylation, in which of the following 4e− produced through photolysis will

470) Most abundant protein of biological world is

471) Core of chlorophyll is formed by

472) Ammonia release from

473) Accessory pigments absorb light and transfer it to

474) Formation of ATP in mitochondria is called

475) Raphides are crystals of

476) Nucleus/core of the chlorophyll contains

477) ATP synthesis is linked to

478) Which of the following is formed during photorespiration?

479) Photosynthesis is maximum in

480) Large number of chloroplast are present in which of the following cells?

481) What is common between chloroplasts, chromoplasts and leucoplasts?

482) Which of the following is true for photosynthesis?

483) RuBisCo is found in

484) ATPase has

485) In dark reaction, regeneration of RuBP needs

486) Rubisco has the active site that binds to

487) Which statement about photosynthesis is false?

488) Identify the incorrect statement with respect to Calvin cycle.

489) NADP reductase enzyme is present on the

490) Cyclic photophosphorylation links to

491) In photorespiration, what is the role of peroxisome?

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

493) In which of the following wavelengths, photosystem-I is inactive?

494) Bacterial photosynthesis involves

495) In photo system-I, the first electron acceptor is

496) 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

497) 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

498) Which one does not occur in cyclic photophosphorylation?

499) Quantum yield of photosynthesis is

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

501) 3-PGA is first stable product in

502) Biosynthetic phase in photosynthesis is also called dark phase
Biosynthetic phase in photosynthesis is also called Blackman’s reaction

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

504) Rhoeo leaves contain anthocyanin pigments in epidermal cells
Anthocyanins are accessory photosynthetic pigments.

505) 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.

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

507) 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

508) C3-plant respond to lower CO2 concentration by showing increased rate of
: C4-plant respond to higher CO2 concentration by showing decreased rate of

509) 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

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