MCQ Questions for Class 12 Medical Biology Human Reproduction Quiz 12

In man, the two vasa deferentia open into?

0%
Urinary bladder
0%
Rectum
0%
Urethra
0%
Penis

Acrosome of sperm is produced by?

0%
Golgi body
0%
Mitochondria
0%
Centrosome
0%
Nucleus

Fimbrae are associated with which organ?

0%
Fallopian tube
0%
Uterus
0%
Vagina
0%
Ovary

________ produces sperm cells.

0%
Seminal vesicle
0%
Urinary bladder
0%
Testes
0%
None of these

Which match(es) is/are incorrect?
A. Spermatogonium -

$46$ chromosomes
B. Spermatid -

$46$ chromosomes
C. Sperm -

$23$ chromosomes
D. Secondary spermatocyte -

$23$ chromosomes.

0%
Only B
0%
A, B and C
0%
C and D
0%
A, B, C and D

Which stage of spermatogenesis the chromosomes are associated with tetrads?

0%
Pachytene
0%
Leptotene
0%
Zygotene
0%
Diplotene

Choose the correct statement:

0%
After spermiogenesis sperm heads become embedded in the sertoli cells.
0%
The release of sperms from the seminiferous tubules is called spermiation.
0%
In testis, the immature male germ cells (spermatogonia) produce sperm by spermatogenesis that begin at puberty.
0%
More than one option is correct.

First sign of growing foetus that is noticed is?

0%
Beating of heart
0%
Development of limbs
0%
Development of external genitalis
0%
Development of eye lashes

Choose the odd one w.r.t. number.

0%
Seminal vesicle
0%
Prostate gland
0%
Cowper's gland
0%
Bartholin's gland

Which of the following statements are correct?
(a) Breast differentiate and start producing milk during pregnancy.
(b) Clitoris is present at the posterior junction of Labia Minora.
(c) In absence of implantation, corpus luteum degenerates.
(d) hCG, hPL, relaxin are produced during menstruation cycle.

0%
a, b, c
0%
b, c, d
0%
Only b
0%
None of the above

Which part of Epididymis is the site for maturation of sperm?

0%
Head Epididymis
0%
Body Epididymis
0%
Both A & B
0%
Tail Epididymis

After some-time of ejaculation, semen liquifies due to presence of profibrinolysin enzyme. It is found in secretion of :-

0%
Prostate gland
0%
Cowper's gland
0%
Seminal vesicle
0%
Vagina

Mark the event that indicates the separation of connection of sperm and Sertoli cells

0%
Spermatogenesis
0%
Spermiogenesis
0%
Spermiotelosis
0%
Spermiation

Secretion of which gland destroy the acidity of vagina.

0%
Seminal vesicle
0%
Prostate gland
0%
Bartholin gland
0%
Bulbourethral gland

Which of the following happens after menopause

0%
Rise in level of estrogen
0%
Rise in level of FSH
0%
Rise in level of progesterone
0%
More than one ption is correct

What is the life period of corpus luteum at the time of pregnancy

0%
4 days
0%
10 days
0%
14 days
0%
28 days

Accessory glands in male reproductive system.

0%
Corpus leuteum
0%
Epididymis
0%
Prostate gland
0%
Scrotum

Identify the cell labelled 'A' in the T.S. of testis:

0%
Leydig cell
0%
Basement membrane
0%
Sperm
0%
Sertoli cell

State whether the following statements are True or False. If false, correct the statement:
The eggs of fish are covered by hard shells for protection.

0%
True
0%
False

Along the path of vas deferens, glands like the prostate and the seminal vesicles add their secretions for the nutrition and easier transport of the sperms.

0%
True
0%
False

Menstruation lasts for about ten to fifteen days.

0%
True
0%
False

Thick and spongy lining of uterus is required for nourishing the embryo if fertilization had taken place.

0%
True
0%
False

Given below are events that lead to pregnancy and development of embryo.
(i) Fertilization of egg
(ii) Maturation of egg
(iii) Release of egg
(iv) Embedding of zygote in thickened uterine wall.
Which of the following options gives the correct order of sequence in which they occur?

0%
i, ii, iii, iv
0%
ii, i, iii, iv
0%
i, iv, ii, iii
0%
ii, iii, i, iv

State whether the following statements are True or False. If false, correct the statement:
In adult human females, a single mature egg is released into an oviduct every month.

0%
True
0%
False

State whether the following statements are True or False. If false, correct the statement:
Human egg has a head, middle piece and tail.

0%
True
0%
False

Eggs are produced by which organ?

0%
Ovary
0%
Fallopian tubes
0%
Uterus
0%
Cervix

Fertilisation takes place in which part of the female reproductive system?

0%
Ovary
0%
Fallopian tubes
0%
Uterus
0%
Cervix

In sexual reproduction, a male and female gametes fuse to form

0%
Embryo
0%
Spore
0%
Zygote
0%
Flower

The elastic tissue connecting the cauda epididymis to the scrotal sac is ____.

0%
Gubernaculum
0%
Tendinous cord
0%
Scrotal ligament
0%
Caput epididymis

The seminiferous tubules of the testis are lined by the germinal epithelium consisting of

0%
Cells of Sertoli
0%
Spermatocytes
0%
Spermatids
0%
All of the above

$2n=16$ in a primary spermatocyte, which is in metaphase of first meiotic division. What shall be the total number of chromatids in each of the secondary spermatocytes?

0%
32
0%
8
0%
16
0%
24

Name the hormone that has no role in menstruation.

0%
LH
0%
FSH
0%
GH
0%
TSH

Sequence of hormones during menstrual cycle is

0%
Oestrogen, progesterone and FSH
0%
Progesterone, oestrogen and FSH
0%
FSH, oestrogen and progesterone
0%
FSH, progesterone and oestrogen

About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called as LH-surge) normally occurs?

0%
5 $^{th}$ day
0%
11 $^{th}$ day
0%
14 $^{th}$ day
0%
20 $^{th}$ day

Explanation

The hormone estradiol suppresses the secretion of luteinizing hormone (LH) during the follicular phase. When the egg has almost matured, the levels of estradiol becomes maximum and beyond the optimum level, this effect is reversed and estrogen stimulates the production of large amounts of LH. This process is known as LH-surge and it starts around day 13

$^{th}$ of the average 28- day cycle and may last for 24 - 48 hours
So, the correct answer is '14

$^{th}$ '

What is the female counterpart of prostate gland in the human male?

0%
Bartholin's gland
0%
Uterus
0%
Clitoris
0%
None of the above

How many secondary spermatocytes will be required to form 400 spermatozoa?

0%
100
0%
200
0%
40
0%
400

List 1 contains terms and List 2 contains definitions. Match them correctly and choose the right answer.

	List I		List II
A	Parturition	1	Attachment of zygote to endometrium
B	Gestation	2	Release of egg from Graafian follicle
C	Ovulation	3	Delivery of baby from uterus
D	Implantation	4	Duration between pregnancy and birth
E	Conception	5	Formation of zygote by fusion of the egg and sperm
		6	Stoppage of ovulation and menstruation

0%
A- 3, B- 4, C- 2, D- 1, E- 5
0%
A- 4, B- 3, C- 2, D- 1, E- 5
0%
A- 3, B- 4, C- 2, D- 5, E- 1
0%
A- 3, B- 4, C- 1, D- 2, E- 5

If after ovulation no pregnancy results, the corpus luteum

0%
Is maintained due to the presence of progesterone
0%
Degenerates in a short time
0%
Starts secreting FSH and LH
0%
Produces hormones oxytocin and relaxin

The Wolffian duct gives rise to

0%
Scrotum
0%
Labia majora
0%
Both A and B
0%
Epididymis

Cleavage was first observed by

0%
Swammerdam
0%
Spallanzani
0%
F.R. Lillie
0%
Leeuwenhoek

Explanation

Jan Swammerdam was the Dutch naturalist and he first observed the cleavage of the egg in the 17

$^{th}$ century and he saw the first furrow of the frog's egg in cleavage.
Spallanzani was the first one to disprove spontaneous generation.
F.R. Lillie identified the influence of potassium on cell differentiation.
Leeuwenhoek was the first to observe bacteria and protozoa.
Thus, the correct answer is option A.

How many ova and sperms would be produced from 100 secondary oocytes and 100 secondary spermatocytes during gametogenesis in human?

0%
100 ova, 100 sperms
0%
100 ova, 200 sperms
0%
50 ova, 100 sperms
0%
200 ova, 200 sperms

Assertion : In human male, there are perianal glands near the anus.

Reason : Perianal glands secretes sex-attractant pheromone which initiates sexual desire in human female.

0%
Both Assertion and Reason are true and Reason is a correct explanation of Assertion
0%
Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
0%
Assertion is true but Reason is false
0%
Both Assertion and Reason are false
0%
Assertion is false but reason is true.

Assertion : Fallopian funnel of oviduct is with finger like fimbriae.

Reason : Graafian follicle of ovary is with secondary oocyte hanging in cavity called antrum.

0%
Both Assertion and Reason are true and Reason is a correct explanation of Assertion
0%
Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
0%
Assertion is true but Reason is false
0%
Both Assertion and Reason are false
0%
Assertion is false but reason is true.

Explanation

$\textbf{Correct option: }$ B

$\textbf{ Solution: }$

$\textbf{ Assertion statement: }$

$\bullet$ Fallopian funnel of oviduct is with finger-like fimbriae.

$\bullet$ Fimbriae is the finger-like structure present in the fallopian tube.

$\bullet$ These are major projections at the end of the fallopian tubes, which allows the movement of egg towards the uterus from the ovary.

$\textbf{ Reason statement: }$

$\bullet$ The antrum is a fluid-filled space that develops among the follicle cells such as the graafian follicle.

$\bullet$ The primary oocytes later get surrounded by a layer of granulosa cells, forming a primary follicle.

$\bullet$ The primary follicles get surrounded by more layers of granulosa cells and a new theca, and are called secondary follicles.

Both Assertion and Reason are true but Reason is not a correct explanation of Assertion

Hence, the correct answer is option (B)

Embryologists can presume the future organs of the embryo in

0%
Blastula
0%
Early gastrula
0%
Morula
0%
Post gastrula

The human embryo is about one inch in length after

0%
2 weeks
0%
4 weeks
0%
6 weeks
0%
8 weeks

During embryonic development the establishment of polarity along anterior / posterior, dorsal / ventral or medial / lateral axis is called

0%
Anamorphosis
0%
Organizer phenomena
0%
Pattern formation
0%
Axis formation

If the nuclei from an 8 celled stage of an embryo are transplanted into enucleated eggs, which of the following events is likely to occur?

0%
Formation of viable embryo in the recipient eggs.
0%
Donor nuclei die in the new environment.
0%
Cleavage occurs but is arrested after some time.
0%
Recipient egg dies.

The concept that organiser is essential for embryonic development was given by

0%
J. Axelrod
0%
C. Landsteiner
0%
H. Spemann
0%
I.P. Pavlov

Which one of the following is correct?

0%
Rods and cones - auditory receptors
0%
Haemoglobin - muscle contraction
0%
Sertoli cells - sperm nutrition
0%
None of the above

Progesterone, ovulation, 28 days, puberty, menarche, 45-50 years, menopause, fallopian tube, 13

$^{th}$ or 14

$^{th}$ days

Fill in the blanks using the given words.
Menstrual cycle is a series of cyclic changes that occur in the reproductive system of human females with a periodicity of about ..........(1) ...........
The cycle begins with ..........(2)...........
The first menstruation is called as ..........(3) ...........
It stops between age of .........(4) ............
Stoppage of menstruation permanently is called as ........(5) .............
At about the middle of the menstrual cycle on .........( ) ..........., the growing follicle bursts and mature ovum is released from the ovary under the influence of higher levels of estrogen and LH.
The phenomenon is called as .........(7)..............
The empty follicle grows into corpus luteum that secretes hormone ........... (8) ..........
The released ovum is drawn into ..................(9) ...................... with the help of inward lashing movements of its internal cilia.
It rests for 1-2 days in the ampulla.
The period is called as fertility period.
Pregnancy can occur only during this phase.

0%
(1)- 28 days, (2)- puberty, (3)- menarche, (4)- 45-50 years, (5)- menopause, (6)- 13 $^{th}$ or 14 $^{th}$ days, (7)- ovulation, (8)- progesterone, (9)- fallopian tube
0%
(1)- 28 days, (2)- puberty, (3)- menarche, (4)- 45-50 years, (5)- menopause, (6)- 13 $^{th}$ or 14 $^{th}$ days, (7)- fallopian tube, (8)- progesterone, (9)- ovulation
0%
(1)- 28 days, (2)- puberty, (3)- menarche, (4)- 13 $^{th}$ or 14 $^{th}$ days, (5)- menopause, (6)- 45-50 years, (7)- fallopian tube, (8)- progesterone, (9)- ovulation
0%
(1)- 28 days, (2)- puberty, (3)- menopause, (4)- 13 $^{th}$ or 14 $^{th}$ days, (5)- menarche, (6)- 45-50 years, (7)- fallopian tube, (8)- progesterone, (9)- ovulation

Explanation

The menstrual cycle is the cycle of natural changes that occurs in the uterus and ovary as an essential part of making sexual reproduction possible. The length of it is an average of 28 days. So, blank 1 is 28 days.
Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction, It leads to the beginning of menstrual cycles in women. So, blank 2 is the menstrual cycle.
Menarche is the first menstrual cycle in females. So, blank 3 is menarche.
This cycle begins generally at the age of 12-13 and ends at the age of 45-55. So, option 4 is 45-50.
Menopause marks the end of menstrual cycle. So, blank 5 is menopause.
At around mid-cycle, when the egg is mature, it gets released from the ovary, pushed down to fallopian tube and is available to be fertilized in the process called ovulation. This occurs around 13th-14th day. So, blank 6 is 13

$^{th}$ or 14

$^{th}$ day and blank 7 is ovulation.
Progesterone is an endogenous steroid hormone and is secreted in the ovaries by the corpus luteum. So, blank 8 is progesterone.
After being released from the ovary, the egg is swept into the fallopian tube by the fimbria, which is a fringe of tissue at the end of each fallopian tube. So, blank 9 is fallopian tube
Thus, the correct answer is option (A), '(1) 28 days, (2) puberty, (3) menarche, (4) 45-50 years, (5) menopause, (6) 13th or 14th days, (7) ovulation, (8) progesterone, (9) fallopian tube'.

CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 12 - MCQExams.com

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Practice Class 12 Medical Biology Quiz Questions and Answers

CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 12 - MCQExams.com

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Practice Class 12 Medical Biology Quiz Questions and Answers

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