Question

Bundle sheath chloroplast of $C_4$ plant are

• A. Large and agranal
• B. Large and granal
• C. Small and agranal
• D. Small and granal

Answer 1

Answer: (A)

Large and agranal

The C4 plants are characterised by Krantz anatomy. These plants are characterised by dimorphic chloroplasts. These plants have thick walled bundle sheath cells lining the vascular supply. The bundle sheath cells have large agranal chloroplasts which fix carbon dioxide into sugars with the help of RUBISCO enzyme. The thin walled mesophyll cells have grana in the chloroplast and carry on initial carbon dioxide fixation with the help of PEP carboxylase enzyme.

Therefore, the correct answer is option A.