Question

Sperm acrosome is derived from
A. Golgi body
B. Endoplasmic reticulum
C. Lysosome
D. Mesosome

Answer 1

Hint: Acrosome is a cap-like organelle which covers the head (anterior portion) of spermatozoa, Acrosome contains various hydrolytic enzymes like hyaluronidase and acrosin which helps the sperm to fertilize the ovum by penetrating the zona pellucida of ovum.

Complete Answer:
Sperm is a microscopic structure which consists of a head, neck, middle piece and a tail.
Option A: The head of the sperm contains a haploid nucleus, the anterior portion of this nucleus is covered by acrosome which is made up of Golgi apparatus and it contains hydrolytic enzymes, Therefore this is the correct option.

Option B: Endoplasmic reticulum are primarily involved in protein synthesis and since sperm do not require protein as their metabolism is glucose based, they do not have endoplasmic reticulum, Therefore this is an incorrect option.

Option C: Lysosome is a type of enzyme that leads to breakdown of any substance.sperm also contain some lysosomal enzyme like hyaluronidase which is required for breaking down the zona pellucida of ovum so that sperm can easily penetrate the ovum leading to fertilization, Therefore this is an incorrect option.

Option D: Mesosomes are the extensions of plasma membrane in prokaryotic cells which helps them in respiration and other processes, As we see that this term is not at all related to sperm as sperm contains nucleus (Eukaryotic cell), Therefore this is an incorrect option.

Hence the correct answer is option A.

Additional Information:
- The head of the sperm contains both nucleus and acrosome.
- The middle piece of sperm contains mitochondria which provides energy for sperm motility.
- Tail of the sperm facilitates the swimming of sperm towards the ovum.

Note: Acrosome formation in a sperm is a very important process without which fertilization is not possible. Globozoospermia is an inherited infertility disease, in which the affected human shows absence of acrosome on the sperm and they are infertile.