Question

Intine of pollen grain is made up of:

• A. Sporopollenin
• B. Cellulose and Lignin
• C. Chitin and Lignin
• D. Cellulose and Pectin

Hint:

The intine layer of the pollen grain is made up of cellulose and pectin, while the outer layer, the exine, contains sporopollenin.

Answer 1

The Correct Option is D

The intine of a pollen grain is the inner layer of the pollen wall, located inside the outer layer called the exine. The intine is primarily made up of cellulose and pectin, which are complex carbohydrates. These substances provide structural support and protect the genetic material within the pollen grain. To clarify the other options:
- Sporopollenin is a major component of the exine, not the intine. It is a highly resistant substance that helps protect the pollen from environmental stresses.
- Chitin and lignin are not components of the intine. Chitin is found in the exoskeletons of arthropods and fungi, and lignin is found in the cell walls of plants but is not a part of the pollen grain intine.
- Cellulose and lignin are found in the cell walls of many plant structures, but cellulose and pectin are the primary components of the intine layer of pollen. Thus, the correct answer is (4) Cellulose and Pectin.