Question

The head of mature mammalian sperm consists of:

• A. acrosome only.
• B. elongated nucleus covered by acrosome.
• C. two centrioles.
• D. nucleus, acrosome, centrioles and mitochondria.

Answer 1

The correct option is B elongated nucleus covered by acrosome.

The head of a mature mammalian sperm consists of an elongated nucleus. The nucleus has the genetic material. The acrosome is one of the main components of a sperm cell overlying the nucleus. It is located on the anterior part of the sperm head where it serves a number of important roles related to fertilisation.

Centrioles are present in the neck region of sperm. They help in the division of the fertilised egg.

Middle piece of sperm has a large number of mitochondria that provide energy to the sperm.