Q. In the leaves of C₄ plants, malic acid formation during CO₂ fixation occurs in the cells of
A) bundle sheath
B) phloem
C) epidermis
D) mesophyll
Explanation
[Solution from source] In C₄ plants PEP carboxylase in mesophyll cells fixes CO₂ into oxaloacetate, which is turned into malic acid there before moving to the bundle sheath. In the bundle sheath, malate is broken down to release CO₂ for the Calvin cycle, so malate is not formed there. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.