Question

The head of a mature sperm is mainly composed of

• A. Elongated nucleus and acrosomal material
• B. Mitochondria, cytoplasm and nucleus
• C. Two centriole and the axial filament
• D. All of the above

Answer 1

The correct option is A Elongated nucleus and acrosomal material

The human sperm is 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 fertilization of the ovum. The middle piece possesses numerous mitochondria, which produce energy for the movement of the tail, that facilitate sperm motility, essential for fertilization.