Which part of the sperm plays an important role in penetrating the egg membrane ?

Acrosome

The correct answer is Option (2) -Acrosome

Sperm is a microscopic structure composed of a head, neck, a middle piece and a tail. A plasma membrane envelops the whole body of sperm. The sperm head contains an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome. The acrosome is filled with enzymes that help fertilisation of the ovum. The middle piece possesses numerous mitochondria, which produce energy for the movement of tail that facilitate sperm motility essential for fertilisation.

The acrosome is a cap-like structure located at the tip of the sperm's head. It contains enzymes that play a critical role in helping the sperm penetrate the protective layers of the egg (ovum) during the fertilization process. The acrosome's enzymatic action is necessary for the successful fusion of the sperm with the egg.