Acrosomal reaction occurs

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immediately after the sperm enters the oviduct.

immediately after the sperm enters the vagina.

when sperm comes in contact with the ovum.

when sperm comes in contact with cervix.

answer is C.

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Detailed Solution

The acrosomal reaction takes place when the sperm comes in contact with the ovum (secondary oocyte). The secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane.

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Best Online Course for IIT JEE

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Best Online Course for CBSE