Question

Which of the following is the function of plant chloroplast?

• A. detoxification of the food
• B. regulation of CO₂-O₂ ratio
• C. preparation of nitrogenous waste
• D. production of the enzyme pepsinogen

Answer 1

The correct option is B

regulation of CO₂-O₂ ratio

The correct option is (B):
Explanation for the correct option:

1. In photosynthesis, carbon dioxide and water are converted to food (glucose) and water in the presence of solar energy.
2. Chloroplast are the green plastids present in the plant cells only.
3. The green pigment called chlorophyll is present in the chloroplast that can trap the solar energy in the leaves to perform photosynthesis.
4. Oxygen is an end product of photosynthesis which is released through the minute pores called stomata present in the leaves.
5. Therefore the ratio of carbon dioxide and oxygen is maintained by chloroplast via., the process of photosynthesis.

Explanation for the incorrect option:

Option A :

1. Detoxification of the food is done by SER or the smooth endoplasmic reticulum present in liver.
2. It helps in the detoxification with the help of enzymes that expel poisons and drugs out from the body.

Option C:

Preparation of nitrogenous waste such as Urea is done by the liver.

Option D:

Production of the enzyme pepsinogen is done by the gastric chief cells.

Final answer: The function of plant chloroplast is regulation of CO₂-O₂ ratio.