NEETBotanyPhotosynthesis in Higher Plants
Match List-I with List-II regarding photorespiration. List-I List-II (A) First 2C product (I) Consumes ATP (B) Energy economics (II) Phosphoglycolate (C) Gas exchange (III) C₃ plants (D) Occurrence (IV) Releases CO₂ Choose the correct answer from the options given below:
Options
- A(A)-(II), (B)-(IV), (C)-(I), (D)-(III)
- B(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
- C(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
- D(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
Correct answer
B. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Step-by-step solution
In the photorespiratory pathway, the first step involves the binding of O₂ to RuBP, catalyzed by RuBisCO. This produces one molecule of phosphoglycerate (3C) and one molecule of phosphoglycolate (2C). Thus, the first 2C product is phosphoglycolate ((A) matches with II). Photorespiration is a wasteful process. It does not synthesize sugars, ATP, or NADPH. Instead, it consumes ATP ((B) matches with I). During this process, O₂ is consumed and CO₂ is released ((C) matches with IV). Photorespiration occurs in C₃ plants