Question

Chloroplast dimorphism is shown by which plant?

• A. Sugarcane
• B. Wheat
• C. Rice
• D. Beet root

Answer 1

The correct option is A

Sugarcane

The correct option is A.

Explanation of correct option:

1. Chloroplast dimorphism refers to the occurrence of two distinct forms of chloroplast within the same plant. This variation could be in the size and shape of mesophyll or bundle sheath chloroplasts. It is a characteristic feature of $\mathrm{C}4$ plants.
2. Sugarcane is a $\mathrm{C}4$ plant. It comprises bundle sheath chloroplast in leaves which is granulated and lacks starch showing chloroplast dimorphism.

Explanation of incorrect options:

Option B:

Wheat carries the $\mathrm{C}3$ pathway of photosynthesis for the conversion of light energy into food and does not have dimorphic chloroplast.

Option C:

Rice is known to carry $\mathrm{C}3$ pathway of photosynthesis to convert light energy into sugar and does not show chloroplast dimorphism.

Option D:

Beetroot is a plant of $\mathrm{C}3$Pathway and does not show chloroplast dimorphism.

Final answer: Sugarcane is a $\mathrm{C}4$ plant that shows chloroplast dimorphism.