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Which one of the following statements about human sperm is correct?

1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
3. Acrosome serves as a sensory structure leading the sperm towards the ovum
4. Acrosome serves no particular function

Correct answer: The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation

Solution

The acrosome contains hydrolytic enzymes (sperm lysins) that digest the egg’s outer coverings, allowing the sperm to penetrate and fertilize the ovum. It is not mainly a sensory organ or a structure that physically pierces the egg.

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