1. Which of the following are TRUE about sperm? Select one or more: a. Hyaluronidase is...

1. Which of the following are TRUE about sperm?

Select one or more:

a. Hyaluronidase is the enzyme involved in dissolving the protective coating around the unfertilized ovum.

b. The first sperm cell to reach the egg successfully fertilizes that cell.

c. Sperm cells have half the number of chromosomes as a spermatagoium and are about the same size.

d. Sperm cell capacitation, which occurs after ejaculation, is required for sperm cells to be active.

e. Mitochodria are located in the mid piece of the tail below the head.

f. The head of the sperm contains the DNA from the father.

g. The acrosome is located at the base of the sperm cell's tail.

Solutions

Expert Solution

Ans. here the options a, d, e and f are true.

a. Hyaluronidase is an enzyme which catalyzes the hydrolysis of hyaluronan present in the extracellular matrix. During fertilization, this enzyme is released from the acrosome of the sperm cell after it has reached the oocyte and dissolving the protective coating around the unfertilized ovum.

b. The first sperm cell to reach the egg is never the one to fertilize it. Hundreds of sperm cells must undergo the acrosomal reaction to degrade the corona radiata and zona pellucida. The one which able to create the path to allow the sperm to contact and fuse with the plasma membrane of the oocyte.

c. Sperm cells are haploid in nature but the spermatagoium are diploid in nature.

d. After ejaculation the sperm cell undergo capacitation to become competent to fertilize the oocyte.

e. Mitochondria are present in the mid piece of the tail below the head.

f. Sperm cell is haploid, so it carries half the number of the total chromosome, that is 23 for humans, which comes form the father.. So, in the head of the sperm, the DNA is present which comes from the father.

g. Acrosome is located on the head of the sperm.

gladiator answered 8 months ago

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