CBSE Questions for Class 12 Medical Biology Human Reproduction Quiz 13 - MCQExams.com

Assertion : All Metatherian are placental mammals.

Reason : All placental mammals have menstrual cycle.
  • Both Assertion and Reason are true and Reason is a correct explanation of Assertion
  • Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
  • Assertion is true but Reason is false
  • Both Assertion and Reason are false
  • Assertion is false but reason is true.
Statements (A, B, C, D) in list I have to be matched with statements (p, q, r, s) in list II.
List IList II
ASeminal vesiclepLatex sheath
BUrinogenital ductq Semen plasma
CCondomr Protozoan
DTrichomoniasissCorpus spongiosum
  • A- q, B- s, C- p, D- r
  • A- q, B- p, C- s, D- r
  • A- s, B- q, C- p, D- r
  • A- q, B- s, C- r, D- p
Which of the following is correct about the path of sperm during ejaculation and the glands involved with the male reproductive system?
  • Vas deferens, testis, urethra, seminal vesicle and prostate gland
  • Testis, vas deferens, seminal vesicle, prostate gland and urethra
  • Urethra, vas deferens, testis, seminal vesicle and prostate gland
  • Seminal vesicle and prostate gland, vas deferens, testis, urethra
Assertion : Corpus luteum degenerates if the ovum remains unfertilized.

Reason : Corpus luteum secretes progesterone which maintains the pregnancy.
  • Both Assertion and Reason are true and Reason is a correct explanation of Assertion
  • Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
  • Assertion is true but Reason is false
  • Both Assertion and Reason are false
  • Assertion is false but reason is true.
Pseudostratified columnar epithelium lines is present in which one of the following?
  • Vas deferens
  • Buccal cavity
  • Bowman's capsule
  • All of the above
Human semen is liquid at ejaculation but soon coagulates (within 15 mins) and again undergo secondary liquification by the enzyme released by the prostate. Enzyme is
  • Erepsin
  • Cathepsin
  • Lysin
  • Acid phosphatase
The release of ovum from Graafian follicles takes place during ........ day.
  • 10$$^{th}$$ - 12$$^{th}$$
  • 14$$^{th}$$ - 16$$^{th}$$
  • Last 2 days of the menstrual cycle
  • 8$$^{th}$$ - 10$$^{th}$$
The duration of the survival of the sperms in the female genital tract is the longest of 4 years in 
  • Guppy fish (Lebistes)
  • Bats
  • Turtle (Malaclemys)
  • All of the above
Which one of the following statements about human sperm is correct?
  • Acrosome serves no particular function.
  • Acrosome has a conical pointed structure used for piercing and penetrating the egg resulting in fertilization.
  • The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization.
  • Acrosome serves as a sensory structure leading the sperm towards the ovum.
Uterus masculinus opens at
  • Uterus anteriorly
  • Prostatic portion of urethera
  • Vagina
  • None of the above
Match List I with List II and pick up the correct answers.
List IList II
AAndrogamone-IIDissolves vitelline membrane
BAndrogamone-IIIIFacilitates attachment of sperm head to the egg surface
CGynogamone-IIIIIncreases sperm activity
DGynogamone-IIIVConserves sperm activity
  • A- I, B- III, C- IV, D- II
  • A- I, B- IV, C- II, D- III
  • A- II, B- I, C- III, D- IV
  • A- IV, B- I, C- III, D- II
The combined length of seminiferous tubules of man is about .............. meters.
  • 100 - 200
  • 200 - 400
  • 400 - 600
  • 600 - 800
Some important events in the human female reproductive cycle are given below. Arrange the events in a proper sequence.
A- Secretion of FSH
B- Growth of corpus luteum
C- Growth of the follicle and oogenesis.
D- Ovulation
E- Sudden increase in the levels of LH.
  • C - A - D - B - E
  • A - C - E - D - B
  • A - D - C - E - B
  • B - A - C - D - E
The muscles helping in getting warmth in testis are
  • Cremaster only
  • Dartos and cremaster
  • Gubernaculum
  • Mesorchium
If somatic chromosomes number isWhat shall be chromosomal number in the cell of seminiferous tubules?
  • 40
  • 20
  • 10
  • 40 and 20
During embryonic development, the establishment of polarity along anterior/posterior, dorsal/ventral or medial/lateral axis is called as
  • Organizer phenomenon
  • Axis formation
  • Anamorphosis
  • Pattern formation
Cortical granules are absent in
  • Fish
  • Frog
  • Man
  • Rat
During the course of development of cells in various regions of an embryo become different in appearance and perform diverse function this is called
  • Gastrulation
  • Differentiation
  • Metamorphosis
  • Organisation
Which of the following organ is differentiated first during development?
  • Heart
  • Skin
  • Brain
  • None of the above
Which represents Mullerian duct in male rabbit?
  • Prostatic utricle
  • Seminal vesicle
  • Cowpers gland
  • Urethra
The cells of germinal epithelium which give rise to spermatozoa are called as _____.
  • Sperm mother cells
  • Spermatids
  • Spermatocytes
  • Spermatogonia
Biflagellated sperm occurs in
  • Man
  • Rat
  • Ascaris
  • Toadfish
In human fetus, the heart begins to beat at a developmental age of
  • 4$$^{th}$$ week
  • 3$$^{th}$$ week
  • 6$$^{th}$$ week
  • 8$$^{th}$$ week
Vasa-efferentia connect the
  • Testes with epididymis
  • Kidneys with cloaca
  • Testes with urinogenital duct
  • None of the above
In the diagram of section of Graafian follicle, different parts are indicated by alphabets. Choose the correct combination.
243612_2435b91afa7149a782b4a24044c5b7a7.png
  • A-membrana granulosa, B-theca interna, C-ovum, D-cumulus oophorus, E-antrum, F-theca externa
  • A-theca externa, B-theca interna, C-ovum, D-membrana granulosa, E-antrum, F-cumulus oophorus
  • A-theca externa, B-theca interna, C-ovum, D-cumulus oophorus, E-antrum, F-membrna granulosa
  • A-membrana granulosa, B-theca externa, C-ovum, D-cumulus oophorus, E-antrum, F-theca interna
Vaginal cavity of tunica vaginalis is found in
  • Ovaries of female
  • Testis of male
  • Vagina of female
  • None of the above
Which one of the following cells provide nutrition to the sperm?
  • Leydig cells
  • Granulosa cells
  • Primary germ cells
  • Sertoli cells
List IList II
ADevelopment of sex organs1Goitre
BStopage of menstrual cycle2Female child
CEggs fuses with 22 + X3Puberty
DDeficiency of iodine4Menopause
  • A- 3, B- 4, C- 2, D- 1
  • A- 4, B- 3, C- 2, D- 1
  • A- 3, B- 4, C- 1, D- 2
  • A- 3, B- 2, C- 4, D- 1
If the menstrual cycle is of 35 days, then what is the risk period (cycle starts on $${ 1 }^{ st }$$ day )?
  • $${ 9 }^{ th }$$ to $${ 17 }^{ th }$$ days
  • $${ 11 }^{ th }$$ to $${ 18 }^{ th }$$ days
  • $${ 16 }^{ th }$$ to $${ 24 }^{ th }$$ days
  • $${ 18 }^{ th }$$ to $${ 35 }^{ th }$$ days
In the human female, menstruation can be deferred by the administraion of
  • FSH only
  • LH only
  • Combination of FSH and LH
  • Combination of estrogen and progesterone
About which day in a normal human menstrual cycle does rapid secretion of LH (called as LH-surge) normally occurs?
  • $$14^{th} $$ day
  • $$20^{th} $$ day
  • $$5^{th} $$ day
  • $$11^{th} $$ day
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
  • Spermatogonia--> spermatid--> spermatocyte--> sperm
  • Spermatocyte--> spermatogonia--> spermatid--> sperm
  • Spermatogonia--> spermatocyte--> spermatid--> sperm
  • Spermatid--> spermatocyte--> spermatogonia--> sperm
Sperms travel during an ejaculation from the ---(i)-----, where they are stored to the ----(ii)----, from where they are transported to the ejaculatory duct and then to the ----(iii)----, which carries both reproductive and excretory fluids. A vasectomy is a surgical procedure for contraceptive purposes in which the ----(iv)---- is cut and blocked so as to prevent sperms from being present in the semen. 

Select the correct sequence of terms to complete the above paragraph.
  • (i)- Vas deferens (ii)- Epididymis (iii)- Urethra (iv)- Vas deferens
  • (i)- Vas deferens (ii)- Epididymis (iii)- Urethra (iv)- Seminiferous tubules
  • (i)- Epididymis (ii)- Vas deferens (iii)- Urethra (iv)- Vas deferens
  • (i)- Epididymis (ii)- Vas deferens (iii)- Urethra (iv)- Seminiferous tubules
Identify the given developmental stage of human embryo and select the correct option regarding it.
316108_5dfcbe5dbd9e42888f1e93278ad0fd88.png
  • Developmental stage- Blastocyst, Site of implantation- Uterine wall
  • Developmental stage- Morula, Site of implantation- Uterine wall
  • Developmental stage- Blastula, Site of implantation- Mid part of fallopian tube
  • Developmental stage- Gastrula, Site of implantation- Mid part of fallopian tube
The given diagram shows changes in uterine lining during a menstrual cycle (divided in five phases, $$a\;to\;f$$).
(i) When release of the egg from the ovary is expected to happen?
(ii) When menstruation is expected to occur?
(iii) If the egg gets fertilized, when implantation of embryo is expected to occur?
315267_2afa17f0566f4ce39e8371c823421066.png
  • i- d,$$\;\;\;\;\;\;\;\;\;\;\;$$ii- a to b,$$\;\;\;\;\;$$iii- e to f
  • i- c to d,$$\;\;\;\;\;$$ii- e to f,$$\;\;\;\;\;$$iii- a to b
  • i- c,$$\;\;\;\;\;\;\;\;\;\;\;$$ii- a to b,$$\;\;\;\;\;$$iii- d to e
  • i- d to c,$$\;\;\;\;\;$$ii- c,$$\;\;\;\;\;\;\;\;\;\;\;\;$$iii- e to f
The figure shows the arrangement of blood vessels in the uterus wall and placenta of a pregnant woman. Which of the following will increase in concentration in the blood as it flows form 1 to 2?
315203_4085128db0dd46dbb75cc6267c2b8533.png
  • Amino acids
  • Carbon dioxide
  • Glucose
  • Oxygen
The given graph represents the changes in thickening of uterine wall in two women X and Y over a period of one month. What should be the correct conclusion regarding this?
314457_f5f2695346744e92a9f0653529c1c56e.png
  • Woman X has conceived
  • Woman Y is undergoing menopause
  • Both women X and Y will undergo menarche in the next month
  • Both A and B
Female sex hormone is
  • Estrogen
  • Androgen
  • Insulin
  • Adrenaline
Convergence and divergence of embryonic cells is called as
  • Differentiation
  • Induction
  • Morphogenesis
  • Blastulation
Both corpus luteum and macula lutea are
  • Found in human ovaries
  • A source of hormones
  • Characterised by a yellow colour
  • Contributory in maintaining pregnancy
Acrosome is formed by
  • Lysosomes
  • Mitochondria
  • Golgi body
  • Ribosomes
Number of spermatozoa, a single primary spermatocyte ultimately produces in spermatogenesis, is 
  • One
  • Two
  • Four
  • Eight
Identify the correct match from the Column I, II and III.
IIIIII
$$1$$. Interstitial cellsa. Cortex of ovaryi. Follicular fluid
$$2$$.Sertoli cellsb. Ovarian follicleii. Progesterone
$$3$$.Granulosa cellsc. Testiesiii. Attachment of sperm bundle
$$4$$. Cells of corpus luteumd. Seminiferous tubulesiv. Testosterone
  • $$2$$- a- iii, $$1$$- c- iv, $$3$$- b- i, $$4$$- d- ii
  • $$1$$- c- iv, $$2$$- d- iii, $$3$$- b- i, $$4$$- a- ii
  • $$1$$- d- iii, $$2$$- a- iv, $$3$$- b- i, $$4$$- c- ii
  • $$2$$- d- iii, $$1$$- c- iv, $$3$$- a- ii, $$4$$- b- iv
The sperm produces substances of enzymatic nature of sperm lysins. In mammals it is called 
  • Hyaluronidase
  • Androgamone
  • Cryanogamone
  • None of the above
In humans, what is the ratio of the number of gametes produced from one male primary sex cell to the number of gametes produced from one female primary sex cell?
  • 1:3
  • 1:4
  • 3:1
  • 4:1
The menstrual cycle in mammals is accomplished with the help of
  • Progesterone and estrogen.
  • Hormones from thyroid gland only.
  • Hormones from placenta only.
  • All of the above.
In the sperm heads, DNA is particularly highly condensed and there is presence of protamines. These protamines are small arginine-rich nuclear proteins. Which of the following protein is replaced by protamines in the sperm head?
  • Histone
  • DNA polymerase
  • Arginine
  • Amines
Which one of the following statements with regard to embryonic development in humans is correct?
  • Cleavage divisions bring about considerable increase in the mass of protoplasm.
  • In the second cleavage division, one of the two blastomeres usually divides a little sooner than the second.
  • With more cleavage divisions, the resultant blastomeres become larger and larger.
  • Cleavage division results in a hollow ball of cells called morula.
The type of cleavage in a zygote depends upon
  • Amount of yolk
  • Amount of cytoplasm
  • Size of nucleus
  • All of the above
Mature sperms are stored in the
  • Seminiferous tubules
  • Vas deferens
  • Epididymis
  • Seminal vesicles
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