1
Question
Exine of pollen grain is made up of
Exine of pollen grain is made up of
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Solution
The correct option is C Sporopollenin
Pollen grain is a uninucleate cell with two layered cell wall. Exine is the outer covering of pollen grain which is highly sculptured with sporopollenin; a chemically inert polymer of carotenoid ester which is highly resistant to degradation by any enzyme, as known so far. Option C is correct. The inner thin cell layer of cellulose/pectin cellulose makes intine; this makes option A incorrect. Lignin may or may not be present in the outer wall which makes option B incorrect. Correct answer is B. The sticky oily covering found around surface of pollens is termed as pollen kit. It is not part of pollen wall. This make option D incorrect.Therefore, the correct answer is option C.
Pollen grain is a uninucleate cell with two layered cell wall. Exine is the outer covering of pollen grain which is highly sculptured with sporopollenin; a chemically inert polymer of carotenoid ester which is highly resistant to degradation by any enzyme, as known so far. Option C is correct.
The inner thin cell layer of cellulose/pectin cellulose makes intine; this makes option A incorrect.
Lignin may or may not be present in the outer wall which makes option B incorrect. Correct answer is B.
The sticky oily covering found around surface of pollens is termed as pollen kit. It is not part of pollen wall. This make option D incorrect.
Therefore, the correct answer is option C.
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