NEETBotanyPhotosynthesis in Higher Plants
Match List-I with List-II regarding the energy requirements in the dark reactions of photosynthesis. List-I List-II A. ATP required for regeneration of RuBP per CO ₂ fixed I. 2 B. Total NADPH required for synthesis of 1 molecule of glucose in C ₃ plants II. 1 C. Total ATP required for synthesis of 1 molecule of glucose in C ₄ plants III. 30 D. ATP required for reduction step per CO ₂ fixed IV. 12 Choose the correct a
Options
- AA-I, B-IV, C-III, D-II
- BA-II, B-III, C-IV, D-I
- CA-II, B-IV, C-III, D-I
- DA-I, B-III, C-IV, D-II
Correct answer
C. A-II, B-IV, C-III, D-I
Step-by-step solution
Let us evaluate each item in List-I based on the stoichiometry of the dark reactions: A. The regeneration of RuBP requires 1 ATP for every CO ₂ molecule fixed. (A matches II) B. In C ₃ plants, the synthesis of 1 molecule of glucose requires the fixation of 6 CO ₂ molecules. Since 2 NADPH are used per CO ₂ , a total of 6 2 = 12 NADPH are required. (B matches IV) C. In C ₄ plants, the fixation of one CO ₂ molecule requires 5 ATP. For 1 molecule of glucose (6 CO ₂ ), a total of 6 5 = 30 ATP are required. (C matches II