Refer to the given cross section of a $C_{4}$ leaf and select the incorrect option.\

Question

Professor PC Thomas Classes · Answer

(d) : The given cross section of the leaf represents Kranz anatomy in a $\mathrm{C}_{4}$ plant. P are the chloroplasts of mesophyll cells, which are granal (i.e., thylakoids are stacked to form grana) and are specialised to perform light reaction of photosynthesis, evolve $\mathrm{O}_{2}$ and produce assimilatory power (ATP + NADPH). Q are the chloroplasts of bundle sheath cells which are agranal, i.e., grana are absent and the thylakoids occur as stroma lamellae. In these chloroplasts, final fixation of $\mathrm{CO}_{2}$ takes place through Calvin cycle where $\mathrm{CO}_{2}$ is fixed by RuBP in the presence of enzyme RuBisCO.