Explain about human sperm, Biology

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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.

The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation

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