Question

Fertilizin is a chemical substance produced from
A. Mature eggs (ovum).
B. Acrosome.
C. Polar bodies.
D. Middle piece of sperm.

Answer 1

Fertilizin is a chemical substance produced by female gametes. The fertilizin is a glycoprotein or mucopolysaccharide secreted by gamete upon its surface. By the release of fertilizin, it is possible for the sperm to fertilize the female gamete through fertilizin-antifertilizin reaction.

Complete answer:
Fertilizin is a chemical substance produced by Mature eggs (ovum). The fertilizin is a glycoprotein or mucopolysaccharide secreted by the ovum upon its surface.
The process by which sperm is made competent to swim and to fertilize the ovum of its species is called capacitation, which occurs in the female reproductive part. This is made possible by the species-specific fertilizin antifertilizin reaction.
The fertilizin is secreted by the ovum upon its surface while antifertilizin is an acidic protein that is secreted by sperm upon its surface. Both work like lock and key. The fertilizin attracts the antifertilizin which makes fertilization possible.
Also,
Acrosome: It is part of the male sperm head. The head is the large nucleus capped with an acrosome which is formed by the Golgi complex. The acrosome contains sperm lysin needed for penetration of sperm.
The middle piece of sperm: This is the powerhouse of the sperm i.e. mitochondrial portion consisting of oxidative enzymes and release energy for the movement of sperms.
Polar bodies: These are the small cells that are produced through meiosis that forms an egg.

The correct answer for the above question is option A which is mature eggs (ovum).

Note:
For the process of fertilization i.e. fusion of male and female gametes, the sperms swim and fertilize the ovum by the action of the fertilizin and antifertilizin complex. This complex makes out the way for the sperm to reach the egg, penetrate and fertilize the egg forming the zygote.