SSC MTS EXAM

SSC

BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement correctly describes one specialisation of a sperm cell?
A
tail contains flagellum which generates ATP
B
head contains chromosomes in homologous pairs
C
acrosome contains enzymes to digest outer portion of egg
D
midpiece contains mitochondria which enter egg
Explanation: 

Detailed explanation-1: -Acrosomes contain digestive enzymes like hyaluronidase and lysins, which helps in breaking down the outer membrane of the ovum called as the zona pellucida, allowing the haploid nucleus in the sperm cell to join the haploid nucleus in the ovum, thus enabling fertilization. Hence, the correct answer is option C.

Detailed explanation-2: -Normal sperm cells have an oval-shaped head with a cap-like covering called the acrosome. The acrosome contains enzymes that break down the outer membrane of an egg cell, allowing the sperm to fertilize the egg.

Detailed explanation-3: -The acrosome is a unique membranous organelle located over the anterior part of the sperm nucleus that is highly conserved throughout evolution. This acidic vacuole contains a number of hydrolytic enzymes that, when secreted, help the sperm penetrate the egg’s coats.

Detailed explanation-4: -In the head of most animal sperm, closely apposed to the anterior end of the nuclear envelope, is a specialized secretory vesicle called the acrosomal vesicle (see Figure 20-25). This vesicle contains hydrolytic enzymes that may help the sperm to penetrate the egg’s outer coat.

There is 1 question to complete.