Question

Identify A, B and C in the given human sperm diagram.

• A. A-Acrosome, B-Plasma membrane, C-Mitochondria
• B. A-Plasma membrane, B-Acrosome, C-Mitochondria
• C. A- Plasma membrane, B-Mitochondria, C-Acrosome
• D. A-Mitochondria, B-Plasma membrane, C-Acrosome

Answer 1

The correct option is B A-Plasma membrane, B-Acrosome, C-Mitochondria


Structure of a sperm (spermatozoa): It consists of four parts i.e., Head, Neck, Middle piece and tail, enveloped by a plasma membrane.

• Head- It is the enlarged end of a sperm, containing the large haploid nucleus, i.e., condensed chromatin body and is capped by acrosome. The acrosome contains hydrolytic enzymes that help in dissolving membranes of the ovum for fertilization.
• Neck- It contains proximal centriole which is necessary for the first cleavage division of zygote and the distal centriole that is connected to the tail filament.
• Middle piece- It contains a number of mitochondria that provide energy for the movement of the tail that facilitate sperm motility essential or fertilization.
• Tail- It consists of axial filaments surrounded by the plasma membrane. It helps the sperms to swim in a fluid medium.

Hence, correct option is: A-Plasma membrane, B-Acrosome, C-Mitochondria.