Question

What is true about C$_4$ plants _________

• A. C$_3$ pathway reactions take place in bundle sheath chloroplast and C$_4$ pathway reactions in mesophyll chloroplast
• B. Both reactions occur in mesophyll chloroplast
• C. Both reactions occur in bundle sheath chloroplast
• D. C$_3$ pathway reactions take place in mesophyll chloroplast and C$_4$ pathway reactions in bundle sheath chloroplast

Hint:

{C$_4$ plants = mesophyll (C$_4$) + bundle sheath (C$_3$)}.

Answer 1

The Correct Option is A

Step 1: Understanding C$_4$ pathway.
C$_4$ plants show spatial separation of initial CO$_2$ fixation and Calvin cycle to minimize photorespiration.

Step 2: Location of reactions.
C$_4$ pathway occurs in mesophyll chloroplasts.
C$_3$ pathway (Calvin cycle) occurs in bundle sheath chloroplasts.

Step 3: Conclusion.
Therefore, option (A) correctly describes the reactions in C$_4$ plants.