Question

Determine the statement that is not related to sporopollenin.

• A. The hard outer layer of pollen grain is called exine which is made up of sporopollenin.
• B. It is one of the most resistant organic material which is produced by endothecium.
• C. No enzyme is known yet which degrades sporopollenin.
• D. It can withstand high temperature and strong acid and alkali.

Answer 1

Answer: (B)

Pollen grains are generally spherical measuring about 25-50 micrometers in diameter. It has 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. Sporopollenin is produced by tapetum.