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Question

In human, during fertilisation, a sperm firstly comes in contact with which layer of the ovum.


A

Zona pellucida

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B

Vitelline membrane

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C

Jelly coat

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D

Corona radiata

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Solution

The correct option is D

Corona radiata


Corona radiata is cellular layer around a mature ovum. Sperm has to penetrate through this by using hyaluronidase enzyme to reach up to zone pellucida membrane, which is acellular.


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