Question

Choose the correct statement from the following
(I) In Hatch-Slack pathway mesophyll cells lack RuBisCO enzyme
(II) PEP carboxylase is present in bundle sheath of chloroplast
(III) OAA is formed in mesophyll cells
(IV) PEP is primary CO2 acceptor present in chloroplast of bundle sheath cells

• A. I, II
• B. II, III
• C. III, IV
• D. I, IV

Hint:

Always verify enzyme location (mesophyll vs bundle sheath) when studying C\textsubscript{4} photosynthesis.

Answer 1

The Correct Option is C

In C\textsubscript{4} (Hatch-Slack) pathway: \begin{itemize} \item OAA (Oxaloacetic acid) is formed in mesophyll cells. Hence, statement III is correct. \item PEP is the primary CO\textsubscript{2} acceptor and is present in mesophyll cells, not bundle sheath. Hence, IV is also correct. \item Statement I is incorrect because mesophyll cells in C\textsubscript{4} plants do have RuBisCO but it functions predominantly in bundle sheath cells. \item Statement II is incorrect because PEP carboxylase is found in mesophyll cells, not in bundle sheath. \end{itemize}