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54. A student listed following combinations of enzymes and their involvement in different phases of Calvin-Benson cycle: (A) Phosphoglycerate kinase — Reduction phase (B) Glyceraldehyde-3-phosphate dehydrogenase — Regeneration phase (C) […]

53. Which one of the following reactions takes place during the reduction phase of the Calvin- Benson cycle? (1) Ribulose 1,5-bisphosphate to 3-phosphoglycerate (2) 1,3-bisphosphoglycerate to glyceraldehyde-3 phosphate (3) Dihydroxyacetone […]

52. During photosynthetic carbon reduction cycle in green leaves, net production of one molecule of glyceraldehyde 3-phosphate requires one of the following combinations of energy equivalents: (1) 9 NADPH and […]

51. What would be effect on photosynthesis in C3 and C4 plants on elevating the concentration of CO2 under light saturated condition? (1) No effect on both type plants (2) […]

50. Oxygenase activity of RUBISCO generates (1) Two molecules of PGA (2) Two molecules of Phosphoglycolate (3) One molecule each of PGA and phosphoglycolate (4) Two molecules each of PGA […]

49. Primary acceptor of CO2 in photosynthesis is (1) Ribose                                          (2) Ribulose-5-P (3) Ribulose1,5-bis Phosphate           (4) 3-Phosphoglycerate The correct answer is (3): Ribulose-1,5-bisphosphate. In C3 photosynthesis (Calvin cycle), the […]

48. Which protein subunit of RUBICO is coded by chloroplast genome? (1) Small sub-unit of RUBISCO (2) Large sub-unit of RUBISCO (3) Entire RUBISCO (4) none The correct answer is […]

47. ‘A’ is an inhibitor of chloroplast function. The production of O2 and synthesis of ATP are measured in illuminated chloroplast before and after addition of ‘A’ as shown below. […]

46. In an experiment, spinach chloroplast are illuminated in the absence of ADP and Pi, then the light is turned off and ADP and Pi are added. Identify the correct […]