First slide

Pre-fertilisation : Structures and Events

Question

Which of the following statements is correct?

Easy

A

Sporopollenin can be degraded by enzymes.
B

Sporopollenin is made up of inorganic materials.
C

Sporopollenin can withstand high temperatures as well as strong acids and alkalis.
D

Sporopollenin can withstand high temperatures but not strong acids.

Solution

Pollen grains have a prominent two-layered wall. The hard-outer layer called the exine is made up of sporopollenin which is one of the most resistant organic material known. It can withstand high temperatures and strong acids and alkali. No enzyme that degrades sporopollenin is so far known.
The inner wall of the pollen grain is called the intine. It is a thin and continuous layer made up of cellulose and pectin.

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