Results
#1. The enzyme responsible for the carboxylation reaction (CO₂ fixation) in C₃ plants is:
#2. Assertion ATP and NADPH are required for the light-independent reactions of photosynthesis Reason These molecules provide energy and reducing power for the fixation of CO₂ during the Calvin cycle
#3. The primary acceptor of CO₂ in C₄ plants is
#4. Linear relationship exists between incident light and rate of CO₂ fixation at in
#5. The enzyme required for CO₂ fixation in the C₄ cycle is
#6. CO₂ fixation during the Hatch and Slack pathway occurs in:
#7. Assertion The C₄ pathway minimizes photorespiration Reason In C₄ plants CO₂ is first fixed into a 4-carbon compound before entering the Calvin cycle which prevents oxygen from binding to RuBisCO
#8. Which of the following statements is not true regarding C₃ plants?
#9. Read the following statements: (a) The F part of ATPase is associated with the breakdown of the proton gradient. (b) A hydrogen carrier contributes to the creation of the proton gradient. (c) The movement of electrons in the electron transport system (ETS) is coupled with the pumping of protons into the lumen. (d) The formation of NADPH + H⁺ is related to the creation of the proton gradient. How many of the above statements are correct?
#10. Choose the incorrect statement about photosynthesis:
#11. In C₄ plants the first stable product of CO₂ fixation is:
#12. Which of the following statements about the Calvin cycle is correct
#13. Plants like sugarcane show high productivity and high efficiency of CO₂ fixation because of
#14. Which one of the following is a C₄ plant?
#15. PEPcase and RuBisCO in C₄ plants are present respectively in
#16. A milestone contribution to the understanding of photosynthesis was made by Cornelius van Niel based on his studies of:
#17. NADPH is generated through:
#18. Choose the correct sequence of steps involved in the C₄ cycle
#19. Regeneration of four molecules of RuBP in the Calvin cycle requires the expenditure of ATP. How many ATPs are required?
#20. Assertion The enzyme RuBisCO is responsible for the fixation of carbon during the Calvin cycle Reason RuBisCO has a higher affinity for oxygen than carbon dioxide which leads to photorespiration
#21. In C₄ plants sugar is produced in:
#22. In the chloroplast the stroma lamellae lack the:
#23. Which among the following is not a step in the Calvin cycle?
#24. The curve showing the effectiveness of different wavelengths of light in photosynthesis was first given by Engelmann using all except:
#25. The chemiosmotic hypothesis for the generation of ATP during the light reaction was first explained by:
#26. Which of the following would rarely be a limiting factor for photosynthesis
#27. Which of the following equations correctly represents the process of photosynthesis?
#28. Assertion C₄ plants show increased efficiency in carbon fixation compared to C₃ plants Reason C₄ plants use two distinct types of cells mesophyll and bundle sheath cells for carbon fixation and the Calvin cycle allowing for better CO₂ concentration
#29. The protons formed by the splitting of water are released in the:
#30. The CO₂ acceptor in C₄ plants is:
#31. RuBisCO in C₄ plants shows minimum oxygenase activity due to
#32. The essential role of air in the growth of green plants was revealed by:
#33. Identify the incorrect match
#34. The oxygen liberated during photosynthesis comes from:
#35. The C₃ and C₄ plants differ from each other in:
#36. Grana present in chloroplast refers to:
#37. Law of limiting factor was given in
#38. The CO₂ concentration at which C₄ plants show saturation is about
#39. Which of the following statements is correct regarding C₄ plants
#40. The photosystem associated with the splitting of water is:
#41. How many components listed below are part of cyclic ETS? P700 PSI Hydrogen carrier PS II Water Splitting Complex P700 ;Which of these are part of the cyclic electron transport system (ETS)?
#42. The enzyme RuBP carboxylase:
#43. The assimilatory power produced during the light reaction in green algae is:
#44. Kranz anatomy of leaves is found in
#45. The movement of electrons according to the Z-scheme in the light reaction is:
#46. In C₄ plants
3
#47. A wasteful process which involves oxidation of organic compounds in plants in the presence of light is called
#48. A photosystem is composed of:
#49. Moll’s half-leaf experiment was done to show the importance of which factor for photosynthesis?
#50. Assertion A In C₄ plants CO₂ fixation takes place initially in the mesophyll cells Reason R PEP carboxylase is the enzyme responsible for fixing CO₂ into a 4-carbon compound in C₄ plants
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