Question

Which of the following combinations of statements are true about C4 cycle?
A. Malic acid formed in the chloroplast of mesophyll cells.
B. Malic acid is transported to the chloroplast of bundle sheath cells.
C. Pyruvic acid produced in mesophyll cells moves to the chloroplast of bundle sheath cells.
D. Malic acid is transported to the chloroplast of mesophyll cells.
Choose the correct answer from the options given below:

• A. A and B only
• B. A and C only
• C. C and D only
• D. B, C, and D only

Hint:

Understand the sequence of events and cell compartments involved in the C4 photosynthetic pathway.

Answer 1

The Correct Option is A

In the C4 pathway, malic acid is synthesized in mesophyll cells and transported to bundle sheath cells. There, it undergoes decarboxylation, releasing CO2 for the Calvin cycle. The produced pyruvic acid returns to the mesophyll cells to regenerate phosphoenolpyruvate (PEP), ensuring continuous carbon fixation.