Question

Give reason - ABA is also known as an antitranspirant.

Hint:

Chlorophyllase is crucial for the ripening process in fruits like bananas, leading to the breakdown of chlorophyll and the appearance of yellow color.

Answer 1

Step 1: Understanding ABA.
Abscisic acid (ABA) is a plant hormone that plays a significant role in stress responses. It is often called an antitranspirant because it helps to reduce water loss by closing stomata, preventing excessive transpiration under drought conditions.
Step 2: Conclusion.
ABA helps to minimize water loss in plants, making it an antitranspirant during times of water stress.
ii. Explain the role of chlorophyllase enzyme in banana.
Solution:
Step 1: Understanding the role of chlorophyllase.
Chlorophyllase is an enzyme that plays a crucial role in the degradation of chlorophyll. In bananas, this enzyme is involved in the breakdown of chlorophyll during the ripening process. As chlorophyll is broken down, the banana changes from green to yellow, indicating ripening.
Step 2: Conclusion.
Chlorophyllase facilitates the breakdown of chlorophyll, contributing to the color change in bananas as they ripen.