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Reproduction

Description: Reproduction
Number of Questions: 25
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Tags: Reproduction Reproductive System
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Which of the following connects the human ovary to the uterus?

  1. Rounded ligament

  2. Ovarian ligament

  3. Isthmus

  4. Infundibulum

  5. Epididymis

Show answer
Correct Option: B
Explanation:

Ovarian ligament connects the ovary to the uterus.

Which of the following is/are present in the head of a sperm?

  1. Nucleus

  2. Acrosome

  3. Mitochondria

  4. Ribosomes and acrosome

  5. Acrosome and nucleus

Show answer
Correct Option: E
Explanation:

Sperm consists of three parts; head, middle place and tail. Head contains nucleus and acrosome.

In a pregnant woman having prolonged labour pains, if child birth has to be hastened, it is advisable to administer hormone that can

  1. activate the smooth muscles

  2. increase the metabolic rate

  3. release glucose into the blood

  4. stimulate ovary

  5. decrease the metabolic rate

Show answer
Correct Option: A
Explanation:

Smooth muscles help to hasten child birth. So, it is advisable to administer hormones that activate these smooth muscles.

During which month of pregnancy is the first movement of foetus and appearance of hair on its head observed?

  1. Fourth

  2. Fifth

  3. Third

  4. Sixth

  5. Ninth

Show answer
Correct Option: B
Explanation:

During fifth month of pregnancy, the foetus starts developing various circulatory organs, and shows the first movement. Appearance of hair is also observed during this month.

Testes descend into scrotum in the breeding season, but in non-breeding season it goes up in

  1. bat

  2. frog

  3. shrew

  4. kangaroo

  5. human

Show answer
Correct Option: A
Explanation:

In bats, testes descend into scrotum only during breeding season.

Which of the following is released by activated spermatozoa that act on the ground substance of the follicle cells?

  1. Progesterone

  2. Hyaluronidase

  3. Gonadotrophin

  4. Teratogen

  5. Relaxin

Show answer
Correct Option: B
Explanation:

Hyaluronidase is released by the activated spermatozoa.

What is the removal of testes or ovaries in case of prostrate cancer called?

  1. Prostatectomy

  2. Hysterectomy

  3. Castration

  4. Hypermastia

  5. Gynecomastia

Show answer
Correct Option: C
Explanation:

Castration is the removal of testes or ovaries in case of prostrate cancer.

Which of the following statements about human sperm is correct?

  1. Acrosome has a spherical structure used for piercing and penetrating the egg resulting in fertilisation.

  2. Acrosome serves as a sensory structure leading the sperm towards the ovum.

  3. The sperm lysin in the acrosome dissolves the egg envelope facilitating fertilisation.

  4. Acrosome serves no particular function.

  5. Acrosome nourishes the egg in the uterus.

Show answer
Correct Option: C
Explanation:

Acrosome possesses an enzyme called lysin, which dissolves the egg envelope and facilitates fertilisation.

What are fraternal twins?

  1. Two offsprings that have developed in the uterus at the same time but are the result of independent fertilisation of two ova.

  2. Two offsprings that develop in the uterus from a single fertilised ovary.

  3. Two offsprings that develop in the fallopian tubes till three months and then implanted in the uterus.

  4. Sexually undeveloped twins that are the result of fertilisation of two ova with a single sperm.

  5. Two offsprings that are joined together in a small area.

Show answer
Correct Option: A
Explanation:

Fraternal twins develop in the uterus at the same time but are the result of independent fertilisation of two ova.

What are Siamese twins?

  1. Dizygotic twins

  2. Non-identical twins

  3. Monozygotic twins

  4. Identical twins

  5. United twins

Show answer
Correct Option: E
Explanation:

Siamese twins are joined in small area and are called united twins. They can be separated by modern surgical techniques.

The mammary glands are functional only in lactating females. Sometimes they become functional in males too. What is this condition called?

  1. Hypermastia

  2. Gynecomastia

  3. Castration

  4. Hysterectomy

  5. Prostatectomy

Show answer
Correct Option: B
Explanation:

The condition where mammary glands become functional in males is called gynecomastia.

Which of the following correctly defines vitellogenesis?

  1. Cyclic changes in female reproductive system

  2. Formation of young ones through fertilisation

  3. Synthesis of yolk in the primary oocyte

  4. Formation of young ones from reproductive units

  5. Formation of male and female gametes

Show answer
Correct Option: C
Explanation:

Vitellogenesis is defined as the synthesis of yolk in the primary oocyte.

What happens during the last stage of the transformation of spermatid into sperm?

  1. Acrosome formation

  2. Microtubules formation

  3. Tail formation

  4. Elimination of cytoplasm

  5. Fusion of nuclei

Show answer
Correct Option: D
Explanation:

Cytoplasm is eliminated out of the sperms in the last stage of the transformation of spermatid into sperm.

Which of the following correctly defines the term colostrum?

  1. The egg that is free from yolk.

  2. First milk that comes from the mammary gland of the mother just after child birth.

  3. The milk that is rich in casein and fat droplets.

  4. Small clots that are present in the nerves of the breasts.

  5. Hormone secreted by the anterior lobe of the pituitary gland and is responsible for the ejection of milk.

Show answer
Correct Option: B
Explanation:

The first milk that comes from the mammary gland of the mother just after child birth for 2 or 3 days is called colostrum.

Which of the following arrangements of microtubules is shown by sperm tail?

  1. 9 + 0

  2. 7 + 2

  3. 9 + 2

  4. 7 + 0

  5. 9 + 7

Show answer
Correct Option: C
Explanation:

The microtubules are arranged as '9 + 2' in the tail of sperm.

Which of the following is essential for the motility of sperm?

  1. Acrosomal cap

  2. Axial filament

  3. Centrioles

  4. Mitochondria

  5. Nuclei

Show answer
Correct Option: B
Explanation:

Axial filament is essential for the motility of sperm.

Spermatids are

  1. haploid

  2. diploid

  3. triploid

  4. polyploid

  5. tetraploid

Show answer
Correct Option: A
Explanation:

Sperms are always haploid, i.e., they possess 23 chromosomes.

Which of the following is the early embryonic stage that follows blastula?

  1. Morula

  2. Amphiblastula

  3. Gastrula

  4. Radula

  5. Blastomorula

Show answer
Correct Option: C
Explanation:

Gastrula is formed by the transformation of blastocyst and possesses primary germ layers.

Withdrawal of which of the following hormones is the immediate cause of menstruation?

  1. FSH

  2. GH

  3. FSH - RH

  4. Estrogen

  5. Progesterone

Show answer
Correct Option: E
Explanation:

Withdrawal of progesterone causes menstruation, i.e., rupturing of uterine wall due to no fertilisation.

What is the gestation period of an elephant?

  1. 282 days

  2. 63 days

  3. 365 days

  4. 624 days

  5. 270 days

Show answer
Correct Option: D
Explanation:

Gestation period varies in mammals. It is of 624 days in elephants and 280 days in humans.

When does implantation of egg in humans occur?

  1. After 7 days of fertilisation

  2. After 2 months of fertilisation

  3. Within 5 days of fertilisation

  4. On 20th day of fertilisation

  5. After 28 days of fertilisation

Show answer
Correct Option: A
Explanation:

Implantation is the attachment of blastocyst to the uterine wall. It occurs after 7 days of fertilisation.

What is a new born baby called?

  1. Offspring

  2. Infant

  3. Foetus

  4. Neonate

  5. Embryo

Show answer
Correct Option: D
Explanation:

A new born baby is called neonate.

Which of the following foetal membranes provides the first blood corpuscles for circulation in embryo?

  1. Trophoblast

  2. Allantoise

  3. Yolk sac

  4. Amnion

  5. Chorion

Show answer
Correct Option: C
Explanation:

Yolk sac is a source of blood cells. It also functions as a shock absorber, and helps to prevent desiccation of the embryo.

Which of the following parts of the human body does not contain villi?

  1. Large intestine

  2. Small intestine

  3. Placenta

  4. Stomach

  5. Alveoli

Show answer
Correct Option: D
Explanation:

Stomach does not possess villi because no absorption takes place in this organ, and villi provide large surface area for absorption.

Which of the following parts of fallopian tube is closest to the ovary?

  1. Isthmus

  2. Infundibulum

  3. Cervix

  4. Ampulla

  5. Vagina

Show answer
Correct Option: B
Explanation:

Infundibulum is present closest to the ovary and it contains fimbricated funnel.

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