Question

In $C_4$ plants, Calvin cycle operates in

• A. Stroma of bundle sheath chloroplasts
• B. Grana of bundle sheath chloroplasts
• C. Grana of mesophyll chloroplasts
• D. Stroma of mesophyll chloroplasts.

Answer 1

The correct option is A Stroma of bundle sheath chloroplasts

In mesophyll cells, carbon dioxide is accepted by PEP and form oxaloacetic acid and further form malic acid which enters the chloroplasts of bundle sheath cells and undergoes decarboxylation yielding pyruvic acid and CO${}_2$. It released in the stroma of bundle sheath cell to bind with RuBisCO and undergoes Calvin cycle to form glucose.

So the correct option is 'stroma of bundle sheath chloroplasts'.