Question

Select the wrongly matched pair with regard to C4 cycle.

• A. Primary CO₂ fixation – PGA product
• B. Site of initial carboxylation – mesophyll cells
• C. Primary CO₂ acceptor – PEP
• D. C4 plant – Maize

Answer 1

The correct option is A Primary CO₂ fixation – PGA product

The primary CO₂ fixation product in C4 cycle is oxaloacetic acid (OAA) in mesophyll cells. It then forms other 4 – carbon compounds like malic acid or aspartic acid in the mesophyll cells itself, which are transferred to the bundle sheath cells.