Which one of the following is resistant to enzyme action?

Which one of the following is resistant to enzyme action?
  1. Leaf cuticle
  2. Cork
  3. Wood fibre
  4. Pollen exine

Solution

Pollen exine : It is formed of sporopollenin which is resistant to microbial, physical and chemical decomposition. Due to presence of sporopollenin, pollens can be preserved for longer period of time in fossil form. Sporopollenin is formed after the oxidative polymerisation of carotenoids.

Asked in: NEET 2008 (Mains)

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