Statement $$1$$: Zygote is the vital link between two generations. Statement $$2$$: Zygote is formed due to fusion of two haploid gametes.

Both statements $$1$$ and $$2$$ are correct

Statement $$1$$ is correct but statement $$2$$ is incorrect

Statement $$1$$ is incorrect but statement $$2$$ is correct

Both statements $$1$$ and $$2$$ are incorrect

Identify the correct match of column $$I, II$$ and $$III$$. Column - $$I$$ Column -$$II$$ Column - $$III$$ sertoli cells a LH i spermatogenesis leydig's cells b inhibin ii formation of the ovarian follicle anterior pituitary c testosterone iii suppress FSH ovary d estrogen iv ovulation

$$A= b-iii, B= c-I, C= a=iv, D= d-ii$$

$$A=b-iii, B= a-iii, C= c-I, D= d-iv$$

$$A= c-ii, B= b-iii, C= a-I, D= d-iv$$

$$B= a-iv, A= d-I, C=b-iii, D= c-ii$$

Match the following columns and select the correct option - Column-1 Column-II (a) Placenta (i) Androgens (b) Zona pellucida (ii) Human Chorionic Gonadotropin (hCG) (c) Bulbo-urethral glands (iii) Layer of the ovum (d) Leydig cells (iv) Lubrication of the penis

(a) - (II), (b) - (iii), (c) - (iv), (d) - (i)

(a) - (i), (b) - (iv), (c) - (ii), (d) - (iii)

(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)

(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

MCQ Questions for Class 12 Medical Biology Human Reproduction Quiz 15

Choose the correct answers from the alternatives given.
Place the following in the correct order concerning the passage of sperm from the testes to the outside of the body
ductus (vas) deferens, rete testes, seminiferous tubules, Epididymis, Urethra, straight tubules

0%
3,4,6,2,1,5
0%
2,4,6,1,3,5
0%
3,6,2,4,1,5
0%
3,6,2,4,5,1

State whether the following statements are true or false .
Oestrus prepares the female reproductive tract for copulation, whereas the menstrual cycle involves an elaborate preparation of the endometrium for implantation of a fertilized egg.

0%
True
0%
False

During Cleavage there is decrease

0%
Size of blastomers
0%
Number of blastomers
0%
DNA content
0%
Nucleocytoplasmic ratio

Statement

1

$1$ : Zygote is the vital link between two generations.
Statement

2

$2$ : Zygote is formed due to fusion of two haploid gametes.

0%
Both statements $1$ and $2$ are correct
0%
Statement $1$ is correct but statement $2$ is incorrect
0%
Statement $1$ is incorrect but statement $2$ is correct
0%
Both statements $1$ and $2$ are incorrect

The difference between spermiogenesis and spermiation is

0%
In spermiogenesis spermatoza from sertoli cells are released in the cavity of seminiferous tubules , while in spermiation spermatozoa are formed.
0%
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
0%
In spermiogenesis spermatozoa are formed , while in spermiation spermatozoa are released from sertoli cells in to the cavity of seminiferous tubules.
0%
In spermiogenesis spermatozoa are formed , while in spermiation spermatids are formed.

Refer to the given graph representing interplay of different hormones (A-D) during menstrual cycle in women and answer the questions that follow.
Which hormones are excreted in urine after menopause?

0%
A
0%
B
0%
C
0%
Both (B) and (C)

Refer to the given graph representing interplay of different hormones (A-D) during menstrual cycle in women and answer the questions that follow.
Which hormone (A, B, C or D) is necessary for the final follicular growth and ovulation?

0%
A
0%
B
0%
C
0%
D

Which of these combinations is most likely to be present before ovulation occurs ?

0%
FSH, corpus luteum, estrogen, secretory uterine lining
0%
LH, corpus luteum, progesterone, secretory uterine lining
0%
FSH, follicle, estrogen, uterine lining becoming thick
0%
Luteinising hormone (LH), follicle, progesterone, thick uterine lining

Though the total number of follicles in the ovaries of a normal young woman is about 4,00,00. The duration between menarche and menopause is limited. This is attributed to the

0%
Follicular atresia
0%
Liquor folliculi
0%
Follicular proliferation
0%
Follicular plasticity

Refer to the given graph representing interplay of different hormones (A-D) during menstrual cycle in women and answer the questions that follow.
Which hormone is most effective in producing uterine changes during menstrual cycle?

0%
A
0%
B
0%
C
0%
D

Mature Graafian follicle is generally present in the ovary of a healthy human female around

0%
5-8 day of menstrual cycle
0%
11-17 day of menstrual cycle
0%
18-23 day of menstrual cycle
0%
24-28 day of menstrual cycle.

Refer to the given graph representing interplay of different hormones (A-D) during menstrual cycle in women and answer the questions that follow.
Cessation of secretion of which of these hormones may lead to osteoporosis?

0%
A
0%
B
0%
C
0%
D

The principal tail piece of human sperm shows the microtubular arrangement of __________.

0%
7 + 2
0%
9 + 2
0%
11 + 2
0%
13 + 2

Androgens influence male libido by acting on

0%
Testes
0%
Penis
0%
CNS
0%
ANS

Epididymis and ejaculatory duct is connected by

0%
Vas deferens
0%
Testis
0%
Gubernaculum
0%
None of the above

Write in sequence

a) Implantation b) Blastomeres
c) Zygote d) Morula
e) Cleavage f) Blastocyst

0%
c - a - b - d - e - f
0%
c - e - b - d - f - a
0%
c - a - e - d - b - f
0%
b - e - f - d - a - c

Half of spermatozoa are without allosomes in

0%
Insects of Hemiptera and orthoptera
0%
Human beings
0%
Drosophila
0%
All of the above

In a twenty year old unmarried female who has never conceived and whose age of attainment of puberty was at twelve years. Approximately how many ovum would have been formed till date-

0%
$48-60$
0%
$96-100$
0%
$192-200$
0%
None of these

The membranous cover of follicular cells around the ovum of ovulation is

0%
Corona radiata
0%
Zona radiata
0%
Zona pellucida
0%
Chorion

Receptor of LH present in

0%
Theca externa cells
0%
Theca interna cells
0%
Corona radiata cells
0%
Zona pellucida

The key events in embryo development are given below which is the correct order of seequences
i) organogenesis ii) Fertilization iii) Gastrulation iv) Neurulation v) Cleavage

0%
v $\rightarrow$ ii $\rightarrow$ iv $\rightarrow$ i $\rightarrow$ iii
0%
ii $\rightarrow$ iii $\rightarrow$ v $\rightarrow$ i $\rightarrow$ iv
0%
iii $\rightarrow$ iv $\rightarrow$ ii $\rightarrow$ i $\rightarrow$ v
0%
ii $\rightarrow$ v $\rightarrow$ iii $\rightarrow$ i $\rightarrow$ iv

Identify the correct match of column $I, II$ and $III$ .

Column - $I$		Column - $II$		Column - $III$
sertoli cells	a	LH	i	spermatogenesis
leydig's cells	b	inhibin	ii	formation of the ovarian follicle
anterior pituitary	c	testosterone	iii	suppress FSH
ovary	d	estrogen	iv	ovulation

0%
$A=b-iii, B= a-iii, C= c-I, D= d-iv$
0%
$A= b-iii, B= c-I, C= a=iv, D= d-ii$
0%
$A= c-ii, B= b-iii, C= a-I, D= d-iv$
0%
$B= a-iv, A= d-I, C=b-iii, D= c-ii$

How the FSH controls the spermatogenesis?

0%
By releasing testosterone
0%
By activation of spermatogonia
0%
By promoting the Sertoli cells to release the ABP and inhibin
0%
By promoting the Sertoli cells to release testosterone

Fructose is present in the secretion of?

0%
Corpus spongiosum
0%
Seminal vesicles
0%
Urethra
0%
Tyson's gland

Identify the incorrect character related to male human reproductive systems.

0%
Seminiferous tubules of testis is open into rete testis.
0%
Seminiferous tubules of testis open into vasa efferentia through rete testis
0%
Epididymis leads to vasa efferentia which ascends to the abdomen.
0%
Epididymis is located along the posterior surface of each testis.

Statement about gametogenesis?

0%
Spermatogenesis begins at puberty whereas oogenesis begins during embryonic stages
0%
Immature male germ cells are called spermatogonia
0%
The diploid spermatogonia periodically undergo meiosis
0%
Spermatogonia in seminiferous tubules increase in number by mitosis

Diploid zygote is formed by the fusion of male and female gamete. This process

0%
Fertilization
0%
Budding
0%
Pollination
0%
Spore

Vas deferens receives a duct from seminal vesicle and opens into urethra as ________.

0%
Urethral meatus
0%
Ejaculatory duct
0%
Ureter
0%
Epididymis

Spermatogenesis is induced by?

0%
FSH
0%
ICSH
0%
STH
0%
ATH

Which of the following statements regarding the sexual development of the foetus is correct?

0%
In the absence of a Y chromosome the sexual development of a foetus will follow the male pattern
0%
The development of the foetal gonads into the male type depends on the presence of oestrogen
0%
The sex of an individual is determined by a set of genes on the X chromosome
0%
The sex of an individual is determined by genes on the Y chromosome

What is the number of chromosomes in primary spermatocyte of human?

0%
$46$
0%
$44$
0%
$23$
0%
$22$

The sperms undergo physiological maturation, acquiring increased motility and fertilising capacity in?

0%
Seminiferous tubules
0%
Vasa efferentia
0%
Epididymis
0%
Vagina

Rewrite the terms in the correct order so as to be in a logical sequence

0%
Implantation ovulation, child birth, gestation, fertilisation
0%
coids, ovum, sperm, sperm duct, urethra, vagina
0%
Sperm duct, pents, testes, sperms, semen
0%
Puberty, menopause, menstruals, menarche

The following graph shows the levels of pituitary hormones during a menstrual cycle. What do 1 and 2 represent?

0%
1-LH, 2-FSH
0%
1- Estrogen, 2-Progesterone
0%
1-FSH, 2-LH
0%
1-Progesterone, 2-Estrogen

The sperms undergo physiology maturation, acquiring increased motility and fertilising capacity in?

0%
Seminiferous tubules
0%
Vasa efferentia
0%
Epididymis
0%
Vagina

How many of the following statement about menstrual cycle are correct?
A. One ovum is released during start of menstrual cycle.
B. Graafian follicle transforms into corpus luteum.
C. Menstrual cycle ceases around

50

$50$ years of age and termed as menopause.
D. LH and FSH decreases gradually during follicular phase.

0%
Four
0%
Two
0%
Three
0%
One

Which statement is incorrect regarding female external genitalia ?

0%
Mons pubis is a cushion of fatty tissue covered by skin and pubic hairs
0%
Clitoris lies at the upper junction of labia minora below the urethral opening
0%
Hymen is not a reliable indicator of virginity
0%
Labia majora are fleshy folds of tissue

Spermatogenesis is a process in which

0%
Spermatids change into spermatozoa
0%
Spermatogonia produce a spermatid
0%
Spermatocytes give rise to spermatozoa
0%
Dormant spermatozoa become active fore ejacuation

Choose the correct option from the following based on the diagram

0%
(a) Spermathecae (e) ovary (f) ovarian funnel (j) prostate gland
0%
(a) testis sac (h) accessory glands (g) ovarian funnel, (i) prostate gland
0%
(h) Spermathecae (a) ovary (j) ovarian funnel (c) accessory glands
0%
(h) testis sac (a) accessory glands (i) ovarian funnel, (g) prostate gland

Semen contains fluid from many parts of the secretory tract, is alkaline to help neutralize the acidic vagina, contains about

20 %

$20\%$ morphologically abnormal sperm, and about

25 %

$25\%$ immotile sperm. Which of the following describes semen that contains sperm with poor motility?

0%
Azoospermia
0%
Oligospermia
0%
Asthenozoospermia
0%
Teratozoospermia

Which of following structure is not the content of spermatic cord?

0%
Vas-deferens
0%
Testicular vessels
0%
Testicular nerve
0%
Deep artery of corpus cavernosa

Which statement is suitable for luteal phase of menstrual cycle ?

0%
Endometrium regenerates through proliferation
0%
Endometrium becomes more vascular and glandular
0%
Follicular development occurs
0%
Endometrium is devoid of glycogen deposits

Explanation

Follicular development occurs-

The luteal phase begins after ovulation. It lasts about

14

$14$ days and ends just surface the menstrual period.

In this phase the ruptured follicle loses after releasing he egg and forms a structures called corpus luteum which produces huge amount of progesterone.

In female if the ovum does not get fertilized then menstruation occurs. The unfertilised ovum along with thick wall of uterus comes out of uterus through vagina Normally when the female reaches the age about 40-45 years, menstruation stops permanently. This is known a menopause and in this stage woman lose the capacity of carrying embryo. Which of the following is true for the occurrence of this condition?
(P) Bones become porous and thus cannot support the embryo
(Q) Alter the menopause ovum does not permit the sperms to reach it.
(R) After menopause ova are not released from the ovary.

0%
Only P
0%
Only Q
0%
Only R
0%
Only P and Q

Match the following columns and select the correct option -

Column-1	Column-II
(a) Placenta	(i) Androgens
(b) Zona pellucida	(ii) Human Chorionic Gonadotropin (hCG)
(c) Bulbo-urethral glands	(iii) Layer of the ovum
(d) Leydig cells	(iv) Lubrication of the penis

0%
(a) - (i), (b) - (iv), (c) - (ii), (d) - (iii)
0%
(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)
0%
(a) - (II), (b) - (iii), (c) - (iv), (d) - (i)
0%
(a) - (iv), (b) - (iii), (c) - (i), (d) - (ii)

CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 15 - MCQExams.com

0:0:3

Practice Class 12 Medical Biology Quiz Questions and Answers

CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 15 - MCQExams.com

0:0:3

Practice Class 12 Medical Biology Quiz Questions and Answers

Support mcqexams.com by disabling your adblocker.