Name the functions - Acrosome of sperm. - Biology

Answer in Brief

Name the functions - Acrosome of sperm.

What is the function of acrosome of sperm.



Acrosome of sperm − It is a cap-like structure present in the anterior part of the head of the sperm. It contains hyaluronidase enzyme, which hydrolyses the outer membrane of the egg, thereby helping the sperm to penetrate the egg at the time of fertilization.

Concept: Gametogenesis
  Is there an error in this question or solution?
Chapter 3: Human Reproduction - Exercises [Page 56]


NCERT Biology Class 12
Chapter 3 Human Reproduction
Exercises | Q 15.3 | Page 56

Video TutorialsVIEW ALL [1]


Give the name and function for ‘A’ and ‘B’ from the diagram given below

Women are often blamed for producing female children. Consequently, they are ill-treated and ostracised. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?

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

Fill in the blanks:

Ovulation is induced by a hormone called the __________

What is spermatogenesis? Briefly describe the process of spermatogenesis.

Fill in the blank. 

 Implantation of embryo occurs in ------ 

Fill in the blank.

---------- type of reproduction occurs without fusion of gametes. 

Body breaks up into several fragments and each fragment starts to live as a new individual. This is ______ type of reproduction.

In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples. 

Multiple choice question.

The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?

Explain the structure of secondary oocyte.

Describe the process of oogenesis in human female.

At the time of birth, there are _______________ oocytes in the ovary of a female foetus.

In meiosis, the number of chromosomes becomes ___________.

What is gamete formation?

Give scientific reason.

Older women are more likely to give birth to children with some abnormalities.

Give scientific reason.

There is a menopause when women are 45-50 years old.

Explain two main process in sexual reproduction.

If newborns are produced at the age of menopause, they may be with some abnormalities. Why?

In angiosperms, the pollen germinates to produce a pollen tube that carries two gametes. What is the purpose of carrying two gametes when a single gamete can fertilize the egg?

If one pollen grain produces two male gametes, how many pollen grains are needed to fertilize 10 ovules?

Sex organs produce gametes which are diploid.

The male sex hormone testosterone is secreted from ____________.

The glandular accessory organ which produces the largest proportion of semen is ____________.

Mammalian egg is ____________.

The Androgen Binding Protein (ABP) is produced by ____________.

Answer the following type of question Assertion (A) and Reason (R).

(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.

(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.

Answer the following type of question Assertion (A) and Reason (R).

(A) - Head of the sperm consists of acrosome and mitochondria.

(R) - Acrosome contains spiral rows of mitochondria.

Mention the differences between spermiogenesis and spermatogenesis.

At what stage of development are the gametes formed in newborn male and female?

Draw a labeled sketch of a spermatozoan.

Define gametogenesis.

Describe the structure of the human ovum with a neat labelled diagram.

Give a schematic representation of spermatogenesis and oogenesis in humans.

Identify the given image and label its parts marked as a, b, c and d

Expand the acronym.


Complete the analogy.

1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.

Which of the following enter the maturation phase of oogenesis?

The part labelled as ______ contains the energy source that facilitates sperm motility.

Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.

Identify the longest period of menstrual cycle.

Identify the correct stages (P - S) in the given diagram of spermatogenesis.

Identify the enzyme released by the sperm which has lytic activity.

Select the pair of cells which does not divide further by mitosis.

Corona radia is made up of ______.

Spermiation is the process of the release of sperms from ______.

Preparation of sperm before penetration of ovum is ______.

The nutritive cells found in seminiferous tubules are ______.

1st polar body is formed at which stage of oogenesis?

Layers of an ovum from outside to inside is ______.

Which of the following are called dual gland?

Aquatic animals in which fertilisation occurs in water are said to be

What does figure represent?

Observe the given figure and answer the questions that follow.

  1. Label A and B.
  2. Identify the process.
  3. What happens during the process and what is formed?

Sperms can be stored for several years in liquid nitrogen with a temperature of ______.

Fetal sex can be determined by examining cells from amniotic fluid looking for:

In the process of fertilization, this is true:

3-celled male gamete develops in:

If for a species 2n = 16, then during Ist prophase and IInd prophase of the meiotic division of a cell, how many tetrads and diads will be formed:

The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:

The number of chromosome groups at the equatorial plate in metaphase-I of meiosis in a plant with 2n = 50 shall be:

Follicular atresia is:

Human milk differs from cow's milk because human milk contains:

In human females, meiosis II is not completed until:

Which of the following cells during gametogenesis is normally diploid?

Germ cells present in the seminiferous tubules undergo ______

How many primary oocytes produce one oogonia?

Draw a neat and labelled diagram of spermatogenesis.

Process of maturation and development of sperms ______.

Answer the following:

How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?

Explain Oogenesis with diagram.

Distinguish between human sperm and ovum.


      Forgot password?
Use app×