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12th Biology 2013 Set1 Delhi Board Paper Solution

Question 19

Draw a diagram of the microscopic structure of human sperm. Label the following parts in it and write their functions.
(a) Acrosome
(b) Nucleus
(c) Middle piece

Answer

microscopic structure of human sperm

Function of Acrosome -

It releases various chemicals like hyalu ronidase and acrosin which helps sperm in fusing with egg cell.

Function of Nucleus -

It stores the genetic information. It carries 23 chromosomes, out of which one is sex chromosome (either X or Y). Thus, it is responsible for determining the sex of the ind ividual.

Function of Middle piece -

T he middle piece contains several mitochondria, which produce energy for the motility of the sperm