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Human Reproduction Class 12 MCQs Questions with Answers
Solve this Human Reproduction Multiple Choice Questions of Class 12 Biology Chapter 3 MCQ, so as not to miss out on any concept from being clear about what they mean!
Select the correct answer:
Question 1.
Choose the incorrect statement from the following:
(a) In birds and mammals internal fertilisation takes place
(b) Colostrum contains antibodies and nutrients
(c) Polyspermy is prevented by the chemical changes in the egg surface
(d) In the human female implantation occurs almost seven days after fertilisation
Answer
Answer: (c) Polyspermy is prevented by the chemical changes in the egg surface
Question 2.
Identify the wrong statement from the following:
(a) High levels of estrogen triggers the ovulatory phase
(b) Oogonial cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards.
(c) Sperms released from seminiferous tubules are poorly motile/non-motile
(d) Progesterone level is high during the post-ovulatory phase of menstrual cycle.
Answer
Answer: (b) Oogonial cells start to proliferate and give rise to functional ova in regular cycles from puberty onwards.
Question 3.
Spot the odd one out from the following structures with reference to the male reproductive system:
(a) Rete testis
(b) Epididymis
(c) Vasa effereritia
(d) Isthmus
Answer
Answer: (d) Isthmus
Question 4.
Seminal plasma, the fluid part of semen, is contributed by
(i) Seminal vesicle
(ii) Prostate
(iii) Urethra
(iv) Bulbourethral gland
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i) and (iv)
Answer
Answer: (c) (ii), (iii) and (iv)
Question 5.
Spermiation is the process of the release of sperms from:
(a) Seminiferous tubules
(b) Vas deferens
(c) Epididymis
(d) Prostate gland
Answer
Answer: (a) Seminiferous tubules
Question 6.
Mature Graafian follicle is generally present in the ovary of a healthy human female around:
(a) 5-8 day of menstrual cycle
(b) 11-17 day of menstrual cycle
(c) 18-23 day of menstrual cycle
(d) 24-28 day of menstrual cycle
Answer
Answer: (b) 11-17 day of menstrual cycle
Question 7.
Acrosomal reaction of the sperm occurs due to:
(a) Its contact with zona pellucida of the ova
(b) Reactions within the uterine environment of the female
(c) Reactions within the epididymal environment of the male
(d) Androgens produced in the uterus
Answer
Answer: (a) Its contact with zona pellucida of the ova
Question 8.
Which one of the following is not a male accessory gland?
(a) Seminal vesicle
(b) Ampulla
(c) Prostate
(d) Bulbourethral gland
Answer
Answer: (b) Ampulla
Question 9.
The immature male germ celts undergo division to produce sperms by the process of spermatogenesis.
Choose the correct one with reference to above.
(a) Spermatogonia have 46 chromosomes and always undergo meiotic cell division
(b) Primary spermatocytes divide by mitotic cell division
(c) Secondary spermatocytes have 23 chromosomes and undergo second meiotic division
(d) Spermatozoa are transformed into spermatids
Answer
Answer: (c) Secondary spermatocytes have 23 chromosomes and undergo second meiotic division
Question 10.
Match between the following representing parts of the sperm and their functions and choose the correct option.
| Column I | Column II |
| (a) Head | (i) Enzymes |
| (b) Middle piece | (ii) Sperm motility |
| (c) Acrosome | (iii) Energy |
| (d) Tail Options | (iv) Genetic material |
Options:
(a) a-ii, b-iv, c-i, d-iii
(b) a-iv, b-iii, c-i, d-ii
(c) a-iv, b-i, c-ii, d-iii
(d) a-ii, b-i, c-iii, d-iv
Answer
Answer: (b) a-iv, b-iii, c-i, d-ii
Question 11.
Which among the following has 23 chromosomes?
(a) Spermatogonia
(b) Zygote
(c) Secondary oocyte
(d) Ogonia
Answer
Answer: (c) Secondary oocyte
Question 12.
Match the following and choose the correct options :
| Column I | Column II |
| (a) Trophoblast | (i) Embedding of blastocyst in the endometrium |
| (b) Cleavage | (ii) Group of cells that would differentiate as embryo |
| (c) Inner cell mass | (iii) Outer layer of blastocyst attached to the endometrium |
| (d) Implantation | (iv) Mitotic division of zygote |
Options :
(a) a-ii, b-i, c-iii, d-iv
(b) a-iii, b-iv, c-ii, d-i
(c) a-iii, b-i, c-ii, d-iv
(d) a-ii, b-iv, c-iii, d-i
Answer
Answer: (b) a-iii, b-iv, c-ii, d-i
Question 13.
Which of the following hormones is not secreted by human placenta?
(a) HCG
(b) Estrogens
(c) Progesterone
(d) LH
Answer
Answer: (d) LH
Question 14.
The vas deferens receives duct from the seminal vesicle and opens into urethra as:
(a) Epididymis
(b) Ejaculatory duct
(c) Efferent ductule
(d) Ureter
Answer
Answer: (b) Ejaculatory duct
Question 15.
Urethral meatus refers to the :
(a) Urinogenital duct
(b) Opening of vas deferens into urethra
(c) External opening of the urinogenital duct
(d) Muscles surrounding the urinogenial duct
Answer
Answer: (c) External opening of the urinogenital duct
Question 16.
Morula is a developmental stage :
(a) Between the zygote and blastocyst
(b) Between the blastocyst and gastrula
(c) After the implantation
(d) Between implantation and parturition
Answer
Answer: (a) Between the zygote and blastocyst
Question 17.
The membranous cover of the ovum at ovulation is :
(a) Corona radiata
(b) Zona radiata
(c) Zona pellucida
(d) Chorion
Answer
Answer: (a) Corona radiata
Question 18.
Identify the odd one from the following:
(a) Labia minora
(b) Fimbriae
(c) Infundibulum
(d) Isthmus
Answer
Answer: (a) Labia minora
Question 19.
Androgens are synthesised by:
(a) Sertoli Cells
(b) Leydig cells
(c) Seminal vesicles
(d) Bulbourethral gland
Answer
Answer: (b) Leydig cells
Assertion and Reason Type Questions
These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses:
(a) If both Assertion and Reason are true and Reason is correct explanation of Assertion.
(b) If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.
Question 20.
Assertion: In morula stage, the cell divides without increase in size.
Reason: Zona pellucida remains till cleavage.
Answer
Answer: (b) If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
Question 21.
Assertion: The third cleavage in frog is latitudinal.
Reason: The mitotic spindle orients parallel to the polar axis.
Answer
Answer: (a) If both Assertion and Reason are true and Reason is correct explanation of Assertion.
Question 22.
Assertion: The development in cockroach is heterometabolous metamorphosis.
Reason: Young ones resemble the adults in all characters.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 23.
Assertion: Holoblastic cleavage with almost equal sized blastomeres is a characteristic of placental mammals.
Reason: Eggs of most mammals, including humans are of centrolecithal type.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 24.
Assertion: In morula stage, the cells divide without any increase in size.
Reason: Zona pellucida remains till cleavage finished.
Answer
Answer: (c) If Assertion is true but Reason is false.
Question 25.
Assertion: Generally, a woman does not conceive during lactation period.
Reason: The hormone prolactin initiates and maintain lactation in a woman.
Answer
Answer: (b) If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
Question 26.
Assertion: Mammalian ova produce hyaluronidase.
Reason: The eggs of mammals are microlecithal and telolecithal.
Answer
Answer: (d) If both Assertion and Reason are false.
Question 27.
Assertion: Cattle breeds can be improved by superovulation and embryo transplantation.
Reason: Superovulation in high milk- yielding cows is induced by hormonal injection.
Answer
Answer: (b) If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
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