Question

In mammalian sperm, spirally arranged mitochondria are present in

• A. Head portion
• B. Middle piece
• C. End piece of the tail
• D. Principal piece of the tail

Answer 1

The correct option is B Middle piece

The sperm has the following components:

Head is spherical in shape consisting of a large nucleus and a dome shaped acrosome present on the nucleus. Nucleus contains genetic information and acrosome releases hyaluronidase enzyme which destroys hyaluronic acid of ovum.

Neck contains proximal and distal centrioles which give rise to axial filament of sperm.

Middle piece is tubular structure in which mitochondria are spirally arranged.

Tail is end part of sperm and helps the sperm to swim.

Thus, the correct answer is option (B).