Question

Mobility of mature sperm is controlled by mitochondria present in:
a. Head
b. Middle piece
c. Tail
d. All the above

Answer 1

The male reproductive cell, or gamete sexual reproduction called Sperm.The larger reproductive cell is of female and the smaller reproductive cell is of male.

Complete answer:
There is a process called spermatogenesis, where sperm cells actually form and these sperm cells take place in testes in case of mammals.
Mitochondria are membrane-bound semi-autonomous cell organelles (mitochondrion, singular) that are found in most eukaryotic organisms. Mitochondria develops most of the chemical energy which is used to give power to biochemical reactions of cells. produced by a small molecule called adenosine triphosphate (ATP) stores this Chemical energy which is produced by mitochondria. However in case of multicellular organisms, some cells do not contain mitochondria.

Mature sperm cell contains head, a neck, a middle piece and a tail. A plasma membrane envelops the whole body of sperm. There are a number of mitochondria which are present in the middle piece of mammalian sperm cells. These mitochondria are spirally arranged. and can be 25 to 30 in number. mitochondria which is present in the middle piece controls the movement of every middle sperm. The movement of the tail is one of the examples of energy which is produced by mitochondria.

Thus, the correct answer is option ‘b’. ’Middle piece'.

Note: Mitochondria present in the middle piece is important for fertilization as it provides energy to the sperm because mitochondria is known as the powerhouse of the cell.