Receptors for sperm binding in mammals are pr | vedclass

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(D) In mammals,the ovum is surrounded by several layers. The outermost layer is the corona radiata,followed by the zona pellucida,which is a thick,non

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Zona pellucida

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(D) In mammals,the ovum is surrounded by several layers. The outermost layer is the corona radiata,followed by the zona pellucida,which is a thick,non-cellular glycoprotein layer.The zona pellucida contains specific receptors (such as $ZP3$ proteins) that are essential for the recognition and binding of the sperm.This binding process triggers the acrosome reaction in the sperm,allowing it to penetrate the zona pellucida and reach the plasma membrane of the oocyte.Therefore,the correct answer is $D$.

Receptors for sperm binding in mammals are present on:

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