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EARLYEXPERIMENTS ON PHOTOSYNTHESIS, The oxygen evolved during photosynthesis came from, waterwas demonstrated by using an isotope of, (b) oxygen in water, (a) hydrogen in water, (c) oxygen in carbon dioxide, (d) carbon in carbon dioxide., , plant, Calvin experimented by radioactive isotopy, 2. In which, , to discoverthe stable product of C3 cycle?, (b) Cycas, (a) Chlorella, (d) Tobacco, Carrot, (c), , 3. Whoamong the following scientists was awarded the, NobelPrize in 1960 for tracing the path of carbon in, , (a), (b), (c), (d), , Photosynthetic unit is called as, (a) sphaerosome, (b) lysosome, (c) quantasome, (d) dictyosome., 12. The central atom in the porphyrin-like ring of chlorophyll, is, 11., , (a) iron, (c) magnesium, , (b) Hatch, (d) Huber, , light harvesting complex are, , (a) 100, , 6., , Who demonstrated for the first time that in photosynthesis,, , oxygen is evolved from water?, (a) Ruben and Kamen, (b) Calvin, (c) R. Hill, (d) Govind ji, 7. A photosynthesising plant is releasing 180 more than the, , normal.The plant must have been supplied with, (a) 03, (b), with 180, 18, (c) C02 with 0, (d) C6H1206with 180., , 8. Who, after conducting experiments on purple and, green sulphur bacteria, inferred that 02 evolved during, photosynthesiscomes from 1-120not from C02?, (a) Sachs, (b) Engelmann, (c) van Niel, (d) Blackmann, , SITE OF PHOTOSYNTHESIS AND PHOTOSYNTHETICPIGMENTS, 9. Which is a, component of chlorophyll?, (a) Mg, (b) Mn, , (b) 200, , (c) 300, , (d) 400., , 14., , Cryptochrome is, (a) yellow light absorbing pigment, (b) pigment of cryptogams, (c) red light absorbing pigment, (d) blue light absorbing pigment., , 15., , Photosynthesis is maximum in, (a) blue light, (b) green light, (c) red light, (d) ultraviolet light., , 4. Path of carbon in photosynthesis was found by using, (a) centrifugation, (b) radioisotopes, (c) fractionation, (d) chromatography., 5. Calvin, used algae in his experiment, for tracing out the, path of carbon, the algae used were, (a) Chlorella and Chlamydomonas, (b) Chlorella and Scenedesmus, (c) Chlorococcum and Chlorella, (d) Chlorococcum and Scenedemus., , (b) manganese, (d) molybdenum., , 13. Number of chlorophyll arranged per reaction centre in the, , photosynthesis?, , (a) Rubin, (c) Calvin, , Bundle sheath with chloroplasts, Bundle sheath extensions, Palisade parenchyma, Spongy parenchyma, , 16. Match the following columns and choose the correct, , combination from the given options., Column I, ColumnIl, A. Visible light, 1. 0.1 to Inm, B. Ultraviolet, 2. 400 to 700 nm, C. X-rays, 3. Longer than 740 nm, D. Infrared, 4. 100 to 400 nm, 5. < 0.1 nm, (a), (b), , (c) A-4,B-3, C-2,D-1, (d), , 17. Which of the following represents the correct molecular, , formula of chlorophyll b ?, , (a) C55H7206N4Mg, (c) C55H7204N4Mg, , (b) C55H7205N4Mg, , 18. Which chlorophyll molecule does not have a phytol tail?, , (a) chl a, , (b) chlb, , (c) chl c, , (d) chl d, , 19. Refer to the given figure and find out the correct matching., 11, 1, , (d) Zn, 10. Whichpart of, leaf is meant for photosynthesis and gaseous, exchange ?, , 111

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(a) I-grana, Il-stroma lamellae, Ill-starch granule, IV-lipid, droplet, V-ribosomes, , 30. Oxygen evolved during photosynthesis comesfrom, , (b) I-stroma lamellae, Il-grana, Ill-ribosomes, IV-starch, granule, V-lipid droplet, , (c) I-grana, Il-stroma lamellae, Ill-lipid droplet,, , 31. The first product of C02 fixation in C4 plants is, , (b) oxaloacetic acid, (d) PER, , (a) PGA, (c) malic acid, , IV-ribosomes, V-starch granule, , (d) I-stroma lamellae, Il-grana, Ill-starch granule,, IV-ribosomes, V-lipid droplet, , (b) water, (d) chlorophyll., , (a) carbohydrates, (c) carbon dioxide, , 32., , The electron lost by P680in the light reactionof, , photosynthesis is finally gained by, , 20. The tollowing graph shows the, , (b) NADPH, (d) none of these., , (a) NADP*, (c) ATP, , 33. First transitory chemical formed by reaction betweenC02, and RuBP is, , (a), (b), (c), (d), , (a) PGAL/GAP, , absorption spectrum of chlorophyll a, absorption spectrum of chlorophyll b, action spectrum of photosynthesis, both (a) and (b)., , 21. Photophosphorylation was discovered by, , (a) Arnon, (c) Hill, , MECHANISM OF PHOTOSYNTHESIS, 23. Which of the following pair is wrong?, (a) C3—Maize, (b) C4 —Kranz anatomy, (c) Calvin cycle —PGA, (d) Hatch and Slack pathway —OAA, , 24. Dark reaction of photosynthesis is characterisedby, (a) water splitting and production of NADP, (b) reduction of NADP to NADPH, (c) cyclic and non-cyclic phosphorylation, (d) enzyme mediated carbon fixation., 25. Which of the following inhibits 02 release in light phase?, (a) PMA, (b) Zeatin, (c) DCMU, (d) None of these, , 26. Light reactions take place in, , (b) grana, (d) ER., , 27. Substrate for photorespiration is, , (a) serine, (b) glycolic acid or glycolate, (d) malic acid., (c) IAA, 28. Which of the following is not a C4 plant?, (b) Crotolaria, (a) Maize, (d) None of these, (c) Sorghum, , 29. In photosynthesis, carbon dioxide is converted to, carbohydrates. It is a, (a) oxidative, (c) catabolic, , (c) PGA, (d) dihydroxy acetone phosphate., 34. Which ofthe following acts as an acceptor ofC02 in C3plans?, , (b) Calvin, (d) Ruben and Kamen., , 22. Hill reaction was demonstrated, (a) in the absence of water, (b) in the absence of carbon dioxide, (c) in the presence of carbon dioxide, (d) in the absence of a suitable electron acceptor., , (a) stroma, (c) cytoplasm, , (b) 2 carboxy, 3-keto, 1-5 biphosphoribotol, , process., (b) reductive, (d) both (a) and (b), , (a) Glycerate phosphate, (c) Sedoheptulose, 35., , (b) Glucose diphosphate, (d) Ribulose bisphosphate, , Which of the following characteristics out of A, B andC, are exhibited by C4 plants?, A. Kranz anatomy, B. The first product of photosynthesis is oxaloacetic acid., , C. Both PEP carboxylase and ribulose bisphosphate, carboxylase act as carboxylating enzymes., (a), (b), (c), (d), , Only A and B, but not C, Only B and C, but not A, Only A and C, but not B, All A, B and C, , 36. In C4 plants synthesis of sugars/final, C02 fixation occurs, In, , (a), (b), (c), (d), , epidermis cells, spongy cells, undifferentiated mesophyll cells, bundle sheath cells., 37. Which of the following, is a C4 plant?, (a) Potato, (b) Mustard, (c) Maize, (d) Wheat, 38. Respiration initiated, in chloroplasts and occur-ing in light, , is called, (a) aerobic respiration, , (b) anaerobic respiration, (c) photorespiration, (d) fermentation., 39. The carboxylating, enzyme present in the bundlesheath, cells of maize leaves, is, , (a) PEP-carboxylase, (c) carbonic anhydrase, , (b) RuBP carbo.xylase, , (d) hexokinase., , 40. Which one of the, following is not paired correctly?, (a) Hill, , - Light reaction, (b) Blackman Dark reaction, , (c) Mitchell —, Non-cyclic photophosphorylation, (d), , Dicker and Tio -, , Photorespiration, , 41. The seat of dark, reaction of photosynthesis is, (a), , grana, (c) stroma, , (b) thylakoids, , (d) intergranary fibres.

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42., , the light, , reaction ofphotosynthesis,, , 12and ATP, , during, are formed, photophosphorylation, , 55. The light dependent and 02 independent production of, , ATP is called, , non-cyclic, (a), photophosphorylation, (b) cyclic, cyclic and non cyclic photophosphorylation, (c) both, cycle., (d) Calvin, is accepted by, CAplants, C02, 43. In pyruvateto form oxaloacetate, (a), to form malate, (b) pyruvate, pyruvate to form oxaloacetate, (c) phosphoenol, to form malate., (d) oxaloacetate, , (a) photorespiration, (b) oxidative phosphorylation, , (c) photophosphorylation, (d) photo-oxidation., 56., , HSK pathway is also called as, (a) C2 cycle, (b) C3 cycle, (c) C4 cycle, (d) none of these., , 57., , In the photosynthetic process, PS Il absorbs energy at or, just below, (a) 680 nm, (b) 860 nm, (c) 880 nm, (d) 780 nm., , molecule of glucose formed in plants during, 44. For each, photosynthesis,the number of molecules of ATP and, NADPH2required respectively are, (b) 24 and 16, (a) 18 and 12, (d) 12 and 24., (c) 12 and 18, an enzyme for, 45. RuBisCOis, (a) C02 fixation in dark reaction, (b) photorespiration, , 58., , (a) Two, (c) Five, , (b) Three, (d) One, , 59. Photosynthesis is correctly explained by the equation, , (a), (b), (c), (d), , (c) regenerationof RuBP (d) photolysis of water., , 46. Whichof the following plants keeps its stomata open, duringnight and closed during the day ?, (a) Wheat (b) Orchid (c) Tea, , How many molecules of ATP are required during, regeneration of RuBP in C3 cycle?, , (d) Cactus, , 47. Non-cyclic photophosphorylation during photosynthesis, , 6()., , 6C02 + 12H20 + C6H1206+ 602 + 6H20, 6C02 + 61420+ C6H1206+ 602 + 6H20, C6H1206+ 602, 6C02 + 6H20, 2C02 + 12H20 C6H1206+ 2C02., , The number of NADPH molecules that are used during the, conversion of carbon dioxide into one molecule of glucose, , (d) 12., , produces, , (a) NADPH (b) NADP (c) NADH, 48., , is a CAM plant., (a) Maize, (c) Onion, , (d) NAD., , (b) Pineapple, (d) Pea, , 49. The radiation energy of light is converted to chemical, energy and stored as, , (a) AMP, , (b) ADP, , (c) ATP, , (d) GMP., , 50. Enzymes of photorespiration are present in, (b) chloroplast, (a) mitochondria, (c) peroxisomes, (d) mitochondria, chloroplast and peroxisomes., 51. First stable product of HSK path is, (b) oxaloacetic acid, (a) malate, (d) succinic acid., (c) oxalosuccinic acid, 52. Photorespiration occurs in, (a) chloroplast, peroxisome and mitochondria, (b) non-photosynthetic cell, (c) both (a) and (b), (d) none of these., 53. In photosynthesis, splitting of water takes place during, (a) cyclic photophosphorylation, (b) oxidative phosphorylation, (c) non-cyclic photophosphorylation, (d) Calvin cycle., 54. C4cycle takes, place in, (a) rice, (b) sugarcane, (c) wheat, (d) Allium cepa., , 61. Choose the correct statement., , (a) The C4plants do not have RuBisCO., (b) Carboxylation ofRuBP leads to the formation of PGA, and phosphoglycolate., (c) Carboxylation of phosphophenol pyruvate results in, the formation of C4 acids., (d) Decarboxylation ofC4 acids occurs in the mesophyll, cells., 62. Match the following and choose the option with correct, , combination of elements., , ColumnIl, , ColumnI, A., B., C., D., , Carboxylation, Phosphorylation, Photolysis of water, Phosphoglycolate, , l., 2., 3., 4., , Oxygen evolution, Photorespiration, RuBisCO, Synthesis of ATP, , (a), , (c), (d), 63. The Calvin cycle proceeds in three stages., , l., , 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-l , 5-biphosphate is formed., Carboxylation, during which carbon dioxide combines, with ribulose-l, 5-biphosphate., Identify the correct sequence., (b) 3-.92—+1, (a), 3., , (c), , (d) 2-+193

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64. Which of the following statements is ü-uewith regard to the, light reaction of photosynthetic mechanism in plants?, (a) Chlorophyll a occurs with peak absorption at 680 nm, in photosystem I and at 700 nm in photosystem Il., , (a) B and C only, (c) C only, , 70. Consider the following statements regarding, photosynthesis., , (b) Magnesium and sodium ions are associated with, , (A) ATP formation during photosynthesis is temedas, photophosphorylation., (B) Kranz anatomy pertains to leaf., , photolysis of water molecules., (c) 02 is evolved during cyclic photophosphorylation., (d) Photosystems I and Il are both involved in non-cyclic, photophosphorylation., , (C) Reduction of NADP* to NADPH occurs duringCaKin, cycle., , (D) In a chlorophyll molecule, magnesiumis presentin, phytol tail., , 65. The primary C02 acceptor in plants having C4 pathway is, , (a) phosphoglyceric acid, (b) glyceraldehydephosphate, (c) phosphoenol pyruvate (d) oxaloacetic acid., , Of the above statements, (a) A and B are correct, (c) A and C are correct, , 66. Refer the given diagram showing Calvin cycle, and select, , the correct option., , 71., Atmosphere, C02 +, , (i), , Carboxylation, , ADP, , Regeneration, , CALVIN CYCLE, , ATP, , (ii), ATP + NADPH, Reduction, , (iii), Sucrose, Starch, , (a), (b), (c), (d), , ADP + Pi + NADP, , (i) RuBP (ii) Triose phosphate (iii) PGA, (i) PGA (ii) RuBP (iii) Triose phosphate, (i) PGA (ii) Triose phosphate (iii) RuBP, (i) RuBP (ii) PGA (iii) Triose phosphate, , 67. Photolysis of each water molecule in light reaction will yield, (a) 2 electrons and 4 protons, (b) 4 electrons and 4 protons, (c) 4 electrons and 3 protons, (d) 2 electrons and 2 protons., , 68. Consider the following statements, (A) The portion of the spectrum between 500 nm and 800, , nm is also referred to as photosyntheticallyactive, radiation (PAR)., (B) Magnesium, calcium and chloride ions play prominent, roles in the photolysis of water., (C) In cyclic photophosphorylation, oxygen is not released, (as there is no photolysis of water) and NADPH is also, not produced., , Of these statements given above, (a) A is true; but B and C are false, (b) A and B are false; but C is true, (c) B is true; but A and C are false, (d) A and B are true; but C is false., , statements with regard to, 69. Which of the following ?, correct, is/are, photosynthesis, , primary C02 acceptor is PER, A. In CAplants, the, process, PS Il absorbs energy, B. In the photosyntheticnm., at or just below 680, that is present in the pignnent system I is, C. The pigment, , (b) A only, (d) A and B only, , (b) C and D are correct, (d) A and D are correct., , In CBplants, the first stable compound formed afterC02, fixation is, , (a) phosphoglyceraldehyde(b) malic acid, (d) 3-phosphoglycerate., (c) oxaloacetic acid, 72. Which one of the following is not true about the light, , reactions of photosynthesis?, (a) Light energy provides energy for the photolysisof, , water through excitation of the reaction centreof, PS 11., , (b) The flow of electrons from water to NADPin noncyclic electron transport produces one ATP., (c) Reactions of the two photosystems are needed forthe, reduction of NADP., (d) P6S0and, are the reaction centres of PS I andPS, , Il respectively., , 73. The minerals involved in the photolysis of water are, , (A) Manganese, (C) Magnesium, , (a) A and B only, (c) A, B and C only, , (B) Calcium, (D) Chloride, (b) A, B and D only, (d) C and D only., , 74. The enzyme responsible for, primary carboxylationinC;, plants is, , (a) hexokinase, (b) succinic dehydrogenase, (c) pyruvate carboxylase, (d) RuBP carboxylase oxygenase., 75. Select the option which, , equation., Serine + a-ketoglutarate, , (a) Hydroxypyruvate, (c) Glycolate, , correctly completesthegiven, A + Glutamate, , (b) Phosphoglycerate, (d) Xylulose-5-phosphate, , 76. Photorespiration is, favoured by, , (a) high temperatureand, low O', (b) high humidity and, temperature, (e) high 02 and low, C02 (d) high C02 and IoW, , 77. What will be the number, of Calvin cycles to generateß, molecule of hexose?, 78. NADPH? is generated, through, (a) photosystem Il, (b) anaerobic respiration, (c), , glycolysis, , (d) non-cyclic, photophosphorylation.

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79., , following correctly distinguish between, Whichof the, Cgand, , (b) promotes, , phosphorylation, (c) none of these, (d) both (a) and (b)., , CAcycle?, , cycle, and, It occurs in mesophyll, bundle sheath cell., , are, (b) Chloroplasts, dimorphic., , is PEE, (c) The C02 acceptor, consuming, (d) Less energy, rocess., , CAcycle, It occurs in, mesophyll cell, only., , Chloroplasts are, monomorphic., The C02 acceptor, is RuBP., High energy consuming process., , evolution and non-cyclic photo-, , FACTORS AFFECTING PHOTOSYNTHESIS, 86. Warburg effect refers to, , for initiation of photosynthesis will be, 80. The first step, (a) photolysis of water, (b) excitement of chlorophyll molecules due to absorption, of light, (d) glucose formation., (c) ATPformation, , (a) decreased photosynthetic rate at very high 02, concentration, , (b) increased photosynthetic rate at very high 02, concentration, , (c) decreased photosynthetic rate at very low 02, concentration, , (d) increased photosynthetic rate at very low 02, concentration., 87. 'The law of limiting factors' was proposed by, , 81. Which is the first C02 acceptor enzyme in CAplants?, , (b) Phosphoric acid, (a) RuDP carboxylase, (d) PEP-carboxylase, (c) RaBisCO, 82. Assimilatorypowers produced during photosynthesis are, (b) ATP and NADP112, (a) Rul)P and RuMP, and, PGAL, (d), and 02., C6V11206, (c), , 83. The first intermediate formed during dark reaction of, photosynthesis is, (a) ribulose 5-phosphate (b) fructose l, 6 diphosphate, (c) phosphoglyceraldehyde (d) ribulose biphosphate., 84. The given figure is indicating the, , Primary acceptor, , (a) Leibig, (c) Blackman, , (b) Hatch and Slack, (d) Arnon., , 88. Photosynthesis in C4 plants is relatively less limited by, , atmospheric C02 levels because, (a) effective pumping of C02 into bundle sheath cells, (b) RuBisCO in C4 plants has higher affinity for C02, (c) four carbon acids are the primary initial C02 fixation, products, , (d) the primary fixation of C02 is mediated via PEP, carboxylase., 89. The factor which is not limiting in normal conditions for, photosynthesis is, (a) water, (b) chlorophyll, (c) light, (d) carbon dioxide., , 90. Given table shows the C02 compensation point and, Photon, , Reaction centre, , 00 0, , Pigment molecules, , non-cyclic phosphorylation, cyclic phosphorylation, light harvesting complex, Z-scheme of light reaction., 85. Dichlorophenyl dimethyl urea (DCMU), (a), (b), (c), (d), , photo(a) inhibits 02 evolution and non-cyclic, phosphorylation, , optimum C02 concentration for photosynthesis for C3 and, CAplants., , Parameters, , (A Plants, , C4 Plants, , C02 compensation point, , 50-150 ppm, , A, , Optimum C02 concentration, B, Select the correct values for A and B., (a) 0-50 ppm, (b) 0-10 ppm, (c) I ()0-150ppm, , (d) 100-110ppm, , ppm, 45() ppm, 250 ppm, 290 ppm, , 360 ppm