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Reproduction (AIPMT)

Description: This test contains questions of Reproduction chapter which is a important topic for Medical entrance exams.
Number of Questions: 16
Created by:
Tags: Reproduction AIPMT
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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

Show answer
Correct Option: C
Explanation:

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

Yolk is synthesised in

  1. liver

  2. fat bodies

  3. Both 1 and 2

  4. sertoli cells

  5. NA

Show answer
Correct Option: C
Explanation:

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

Gynogenesis is shown by

  1. some annelids

  2. nematodes

  3. Both 1 and 2

  4. None of these

  5. NA

Show answer
Correct Option: C
Explanation:

Gynogenesis is a type of parthenogensis in which the sperm stimulates the egg cell to develop into an embryo, but no male inheritance is transmitted.

One oogonium forms

  1. 1 ovum + 1 polar body

  2. 1 ovum + 3 polar bodies

  3. 1 ovum without centrioles + 3 polar bodies

  4. 1 ovum and no polar body

  5. NA

Show answer
Correct Option: C
Explanation:

One primary oocyte will form one secondary oocyte + 1 polar body after meiosis 1.

What is the name of the chemical present in ovum which attracts sperm?

  1. Fertilizin

  2. Antifertilizin

  3. Both 1 and 2

  4. None of these

  5. NA

Show answer
Correct Option: A
Explanation:

A fertilizin is a proteoglycan which is secreted by ovum.

Which of the following is formed during gastrulation?

  1. Heart

  2. Lungs

  3. Primitive gut

  4. Brain

  5. NA

Show answer
Correct Option: C
Explanation:

Gastrulation involves a process of invagination at one end of blastula which results in the formation of two-layered cup-shaped gastrula. 

Fertilisation takes place in the

  1. ovary

  2. fallopian tubes

  3. uterus

  4. vagina

  5. NA

Show answer
Correct Option: B
Explanation:

It is the correct answer.

Mesolecithal eggs are found in

  1. humans

  2. reptiles and birds

  3. amphibians

  4. marsupials

  5. NA

Show answer
Correct Option: C
Explanation:

Mesolecithal eggs are those eggs in which yolk is in moderate amount.

Eggs of insects are

  1. megalecithal

  2. centrolecithal

  3. alecithal

  4. Both 1 and 2

  5. NA

Show answer
Correct Option: D
Explanation:

This option is correct.

Which part(s) of the sperm provide(s) energy to the sperm to fertilise the egg?

  1. Sperm head

  2. Middle piece

  3. Tail

  4. All of the above

  5. NA

Show answer
Correct Option: B
Explanation:

The middle piece has a central filamentous core.

Echinoderms show ____ cleavage.

  1. spiral

  2. rotational

  3. radial

  4. biradial

  5. NA

Show answer
Correct Option: C
Explanation:

It is the correct answer.

One primary spermatocyte will produce ___ sperms.

  1. 4

  2. 2

  3. 8

  4. 0

  5. NA

Show answer
Correct Option: A
Explanation:

One primary spermatocyte (2N) undergoes meiosis I and produces two daughter cells.

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

Show answer
Correct Option: A
Explanation:

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

Liver and pancreas develop from

  1. mesoderm

  2. endoderm

  3. ectoderm

  4. All of the above

  5. NA

Show answer
Correct Option: B
Explanation:

It is the correct answer. Liver and pancreas develop from endoderm.

Which of the following methods of contraception has the lowest degree of effectiveness?

  1. Oral pill

  2. IUCD

  3. Condom

  4. Vasectomy

  5. NA

Show answer
Correct Option: C
Explanation:

Condoms are the least effective with only 85-90% effectiveness. 

________ lay cleidoic eggs.

  1. Birds

  2. Reptiles

  3. Insects

  4. All of the above

  5. NA

Show answer
Correct Option: D
Explanation:

Cleidoic eggs have a protective shell and are laid out of water.

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