Human Reproduction Test

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Human Reproduction Test - 5

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Question 1
1 / -0.25

In which part of sperm, mitochondria are present?

A
Head

B
Middle piece

C
Tail

D
Neck
Solution
Mitochondria are known as the cell 's powerhouse, and the middle component of sperm contains a high number of them.

Mitochondria provides energy required by Sperms for active motility.

Structure of Sperm:

Hence, the correct option is B.
NCERT Reference: topic “GAMETOGENESIS ”of chapter: Human Reproduction .
Question 2
1 / -0.25

What is the period of pregnancy called?

A
Gestation

B
Delivery

C
Menstrual cycle

D
Coitus

Solution

The time taken by a developing embryo inside the womb of a placental mammal is called the gestation period , at the end of which a baby is delivered in the act of parturition.

Hence, the correct option is A.

NCERT Reference: topic “PARTURITION AND LACTATION ”of chapter: Human Reproduction.
Question 3
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The conversion of spermatid into spermatozoa is called?

A
Spermatogenesis

B
Cytokinesis

C
Spermiogenesis

D
Vitellogenesis
Solution
Spermiogenesis is the process through which immature nonmotile spermatids develop into motile sperms.

Each spermatid undergoes metamorphosis to develop into spermatozoa or sperms having head, neck and tail.

Acrosome is present at the tip of head that contain enzyme for hydrolysis of the wall of ovum during fertilisation.

Hence, the correct option is C.
NCERT Reference: topic “GAMETOGENESIS ”of chapter: Human Reproduction.
Question 4
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The number of polar bodies formed during oogenesis in human being is:

A
2

B
4

C
1

D
3

Solution

One primary oocyte will form one secondary oocyte and 1 polar body after meiosis 1. The polar body will give rise to 2 another polar bodies and 1 secondary oocyte will form one ovum without centrioles after meiosis 2. So, one oogonium will form 1 ovum without centrioles and 3 polar bodies.
Question 5
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In oocyte secondary maturation occurs in _________.

A
Ovary

B
Abdominal cavity

C
Fallopian tube

D
Uterus
Solution
In the secondary oocyte, the meiotic division is arrested at the metaphase stage.

After ovulation, the secondary oocyte passes into fallopian tube , where meiosis II is completed only after the entry of sperm.

Hence, the correct option is C.
NCERT Reference: topic “THE FEMALE REPRODUCTIVE SYSTEM ”of chapter: Human Reproduction.
Question 6
1 / -0.25

Beginning of menstrual cycle is called as _________.

A
Ovulation

B
Oogenesis

C
Menarche

D
Menopause
Solution
At puberty, the menstrual cycle begins in girls. The beginning of menstrual cycle is called menarche .

It starts at the age of about 11 to 12 years in girls.

Hence, the correct option is C.

NCERT Reference: topic “MENSTRUAL CYCLE ”of chapter: Human Reproduction.
Question 7
1 / -0.25

Which of the following hormone is produced in female only during pregnancy?

A
Testosterone

B
Human chorionic gonadotropin hormone (hCG).

C
Progesterone

D
Estrogen
Solution
It is made almost exclusively in the placenta.

hCG hormone levels found in the mother 's blood and urine, rise a lot during the first trimester.

hCG Maintains the corpus luteum throughout the early stages of pregnancy. It is used to detect pregnancy.

Hence, the correct option is B.

NCERT Reference: topic “PREGNANCY AND EMBRYONIC DEVELOPMENT ”of chapter: Human Reproduction.
Question 8
1 / -0.25

The _________ is the sexual intercourse between male and female sex.

A
Spermatogenesis

B
coitus

C
a and b both

D
None of these
Solution
Transfer of male gametes (sperm) into the female genital tract occurs during sexual intercourse that may lead to the fertilisation of the ovum for pregnancy.

Sexual intercourse is calledcoition or coitus .

Hence, the correct option is B.
NCERT Reference: topic “FERTILISATION AND IMPLANTATION ”of chapter: Human Reproduction.
Question 9
1 / -0.25

Ovulation occurs on the _________ day of menstrual cycle.

A
08-10

B
11-13

C
14-16

D
16-18
Solution
The release of ovum from ovary during menstrual cycle is called ovulation.

Ovulation occurs in the middle of menstrual cycle that is on 14-16th day of start of menstrual cycle.

Hence, the correct option is C.
NCERT Reference: topic “MENSTRUAL CYCLE ”of chapter: Human Reproduction.
Question 10
1 / -0.25

The cellular layer that disintegrates and regenerates again and again is _______.

A
Dermis of skin

B
Endometrium of uterus

C
Cornea of eye

D
Endometrium of blood vessels

Solution

The functional layer of the human endometrium is a highly regenerative tissue undergoing monthly cycles of growth, differentiation, and shedding during a woman 's reproductive years. Fluctuating levels of circulating estrogen and progesterone orchestrate this dramatic remodelling of human endometrium.

Hence, the correct option is B.
NCERT Reference: topic “MENSTRUAL CYCLE ”of chapter: Human Reproduction.
Question 11
1 / -0.25

During which month of pregnancy the first movement of fetus is observed?

A
Sixth month

B
Fourth month

C
Fifth month

D
Third month
Solution
The movement of the fetus is observed in the fifth month of pregnancy.

In the first month heart is formed.

In the second month limbs and digits are formed.

At the end of three months, all major organs and genital organs are formed.

Hence, the correct option is C.
NCERT Reference: topic “PREGNANCY AND EMBRYONIC DEVELOPMENT ”of chapter: Human Reproduction.
Question 12
1 / -0.25

How does human sperm locomote?

A
Flagella

B
Cilia

C
Neutrophils

D
None of the above
Solution
The sperm has the following components: head, neck, middle piece and tail.

Head is spherical, consisting of the nucleus and acrosome.

Neck contains centrioles.

Middle piece have mitochondria that are spirally arranged.

The tail of sperm is the flagellum , which contains axial filaments and propels sperm to the egg.

Hence, the correct option is A.
NCERT Reference: topic “GAMETOGENESIS ”of chapter: Human Reproduction.
Question 13
1 / -0.25

Acrosome is filled with _________.

A
Lipids

B
Hormones

C
Enzymes

D
None of the above
Solution
The head of mature mammalian sperm is made of elongated nucleus covered by acrosome .

The acrosome is filled with hydrolytic enzymes that help in fertilization of ovum.

These enzymes called sperm lysins that dissolve the membranes enveloping the ovum and help the sperm cell to enter the ovum by penetrating the egg membrane.

Hence, the correct option is C.

NCERT Reference: topic “GAMETOGENESIS ”of chapter: Human Reproduction.
Question 14
1 / -0.25

Hormone responsible for milk ejection after the birth of baby is:

A
Progesterone

B
vasopressin

C
Estrogens

D
Oxytocin

Solution

The mammary glands of the female undergo differentiation during pregnancy and start producing milk towards the end of pregnancy by the process called lactation .

Lactiferous glands present inside the mammary gland produce milk due to the release of the hormone oxytocin from pituitary glands.

Hence, the correct option is D.

NCERT Reference: topic “PARTURITION AND LACTATION ”of chapter: Human Reproduction.
Question 15
1 / -0.25

The yellowish coloured milk secreted from the breast shortly after birth of the baby is called?

A
Lactogen

B
Primary milk

C
Colostrum

D
None of these
Solution
After parturition, mammary glands start producing milk. The yellowish coloured milk is called colostrum .

This milk contains antibodies that provide immunity to newly born baby.

Hence, the correct option is C.
NCERT Reference: topic “PARTURITION AND LACTATION ”of chapter: Human Reproduction.