Question

What is the site of $C_3$ cycle in $C_3$ and $C_4$ plants?

• A. In $C_3$ plants-Mesophyll cell and in $C_4$ plants-Bundle sheath cell
• B. In $C_3$ plants-Bundle sheath cell and in $C_4$ plants-Mesophyll cell
• C. In $C_4$ plants-Bundle sheath cell and in $C_3$ plants-Bundle sheath cell
• D. In $C_3$ plants-Mesophyll cell and in $C_4$ plants-Mesophyll cell

Answer 1

Answer: (A)

In $C_3$-plants, all the reactions of $C_3$ or Calvin cycle occur in mesophyll cells of leaves, while $C_4$-plants show a distinct type of anatomy called as Kranz anatomy, where two different regions mesophyll cells and bundle sheath, are involved in this process.