NEETBotanyPhotosynthesis in Higher Plants
Match List I with List II regarding photosynthetic pathways. List I List II A. RuBisCO in C ₃ plants I. Mesophyll cells B. RuBisCO in C ₄ plants II. Bundle sheath cells C. PEPcase in C ₄ plants III. Phosphoenol pyruvate (PEP) D. Primary CO ₂ acceptor in C ₃ plants IV. Ribulose bisphosphate (RuBP) Choose the correct answer from the options given below:
Options
- AA-I, B-II, C-I, D-IV
- BA-II, B-I, C-I, D-IV
- CA-I, B-II, C-III, D-IV
- DA-II, B-I, C-III, D-IV
Correct answer
A. A-I, B-II, C-I, D-IV
Step-by-step solution
In C ₃ plants, the Calvin cycle occurs in the mesophyll cells, so the enzyme RuBisCO is localized there. In C ₄ plants, there is a spatial separation of pathways. The initial fixation of CO ₂ occurs in the mesophyll cells where the enzyme PEPcase is present. The Calvin cycle operates in the bundle sheath cells, which is where RuBisCO is localized. The primary CO ₂ acceptor in C ₃ plants is a 5-carbon ketose sugar, Ribulose bisphosphate (RuBP). Therefore, the correct matching is A-I, B-II, C-I, D-IV. Matching PEPcas