Question

In how many of the given plants $C_3$ cycle is present in mesophyll cell?
Wheat, Pea, Maize, Pineapple, Agave, Sorghum, Tomato.

• A. Seven
• B. Five
• C. Six
• D. Two

Answer 1

Answer: (B)

Five

$C_3$ plants are plants in which the initial product of the assimilation of carbon dioxide through photosynthesis is 3-phosphoglycerate, which contains 3 carbon atoms.

$C_3$ plants are wheat, pea, tomato.

Pineapple and agave are CAM plant.

In both CAM and $C_3$ plants, the Calvin cycle ($C_3$ cycle) occurs in the mesophyll cells.

Maize and sorghum are $C_4$ plants. Here the Calvin cycle ($C_3$ cycle) occurs in the bundle-sheath cells.

So the correct answer is option B.