Biology

Human Reproductive System

751 Questions

The human reproductive system covers the anatomy of reproductive organs, gamete production, fertilization processes, and reproductive technologies. This is a highly scoring area in biology sections of competitive exams. Use these questions to practice key concepts.

Fertilization processGamete productionReproductive organ functionsAssisted reproductive technology

Human Reproductive System Questions

Multiple choice

In case of animals, the cells of zygote (formed with the fertilization of sperms and ovum) show totipotency. Which of the following statements is/are correct about totipotency?

  1. Ability to divide indefinitely into complete organisms.
  2. Production of blood corpuscles (RBCs, WBCs, Platelets)

  1. Only (1)

  2. Only (2)

  3. Both (1) and (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (1) is correct. 'Totipotency' word 'Toti' means total and 'potent' means capacity to divide indefinitely and differentiate into full fledged organisms. Statement (2) is incorrect. Production of blood corpuscles is the function of stem cells, which are produced from totipotent cells.

Multiple choice

Which of the following statements about acrosomes is correct?

  1. Acrosomes serve no particular function.

  2. Acrosomes have a conical pointed structure which is used for piercing and penetrating the egg.

  3. The sperm lysins in the acrosome dissolve the egg membrane, thereby starting fertilisation.

  4. Acrosomes serve as a sensory structure and thereby, lead the sperm towards ovum.

  5. NA
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Acrosomes contain digestive enzymes like hyaluronidase and lysins which help in breaking down the outer membrane of the ovum.

Multiple choice

Yolk is synthesised in

  1. liver

  2. fat bodies

  3. Both 1 and 2

  4. sertoli cells

  5. NA
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yolk proteins are the most abundant egg proteins in oviparous animals.

Multiple choice

The correct sequence is

  1. spermatogonia - spermatocyte - spermatid - sperms

  2. spermatogonia - spermatids - spermatocyte - sperms

  3. spermatids - spermatogonia - spermatocyte - sperms

  4. spermatogonia - spermatocyte - sperms - spermatids

  5. NA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The correct sequence is spermatogonia - spermatocyte - spermatid - sperms.

Multiple choice

In mammals, the prevention of polyspermy ensures that the diploid zygote is protected. Which of the following mechanisms is involved in the process of polyspermy?

  1. Resumption of the second meiotic division of the egg

  2. Activation of the polar body to begin mRNA synthesis

  3. Depolarization of the egg membrane by a rise in intracellular calcium

  4. Initiation of the acrosome reaction in the sperm

  5. The zona pellucida is modified by serine proteases that are released from the cortical granules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During fertilization, a sperm cell penetrates an oocyte (egg); fusion of sperm and oocyte membranes drives an increase in intracellular calcium in the oocyte. This fusion and rise in calcium causes depolarization of the egg membrane which prevents other sperm cells from fusing with the egg cell (this is the primary block to polyspermy).

Multiple choice

A 29 year old European lady underwent bilateral tubal ligation after her last pregnancy. During her procedure, the middle portions of both fallopian tubes were removed. Which function of the fallopian tube is not disrupted by this procedure?

  1. Egg transport

  2. Sperm transport

  3. Embryo transport

  4. Intratubal ciliary motion

  5. Fallopian Tube Sperm Perfusion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Removal of the middle portions of both fallopian tubes does not affect the function of the cilia which lines the inside of the fallopian tubes.

Multiple choice

Which of the following statements is/are false?

a. Condoms can prevent users from STDs and AIDS. b. Diaphragms and vaults are barriers of rubber which is inserted into the male's reproductive tract. c. Intrauterine devices are inserted in the uterus through vagina.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this statement is false. Diaphragms and vaults are barriers of rubber which is inserted into the female's reproductive tract.

Multiple choice

Which of the following statements is/are false?

a. Embryos formed by the fusion of gametes within the female can be used for intra uterine transfer. b. In intra cytoplasmic sperm injection, a sperm is directly injected into the ovum. c. In vitro fertilisation is a technique in which fertilisation is done inside the body of the female.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. In vitro fertilisation is a technique in which fertilisation is done outside the body in almost similar conditions as those in the body.