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Male Gametophyte

Which of the ...

Question

Which of the following statements about sporopollenin is wrong?

A

Intine is formed of sporopollenin

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B

Sporopollenin is not degraded by any known enzyme

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C

Sporopollenin is most resistant organic material

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D

Sporopollenin can withstand high temperature and strong acids

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Solution

The correct option is A Intine is formed of sporopollenin
The exine of the pollen grains consists most resistant biological material known as Sporopollenin. It is resistant to both microbial and chemical decomposition by which it preserves pollen grains during fossilization. Exine consists of sporopollenin.
So the correct option is 'Intine is formed of sporopollenin'.

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Q. Most resistant biological material is
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An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

Q. Identify the pair of wrong statements in the following.
I) Intine of pollen grain is made up of sporopollenin.
II) Pollen grains are well preserved as fossils because of the presence of sporopollenin.
III) Enzymes can degrade the organic material of the exine of pollen grain.
IV) Sporopollenin can withstand high temperatures, strong acids and alkali.

Q. Identify the pair of wrong statements.
I. Intine of pollen grains is made up of sporopollenin.
II. Pollen grains are well preserved as fossils because of the presence of sporopollenin.
III. Enzymes can degrade the organic material of the pollen grain exine.
IV. Sporopollenin can withstand high temperature, strong acids and alkali.

Q. Assertion :Exine of a pollen grain is made up of sporopollenin which is resistant to high temperature, strong acid or alkali as well as enzymatic degradation. Reason: Sporopollenin is absent in the region of germ pores.

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