MCQ Questions for Class 12 Biology: Ch 3 Human Reproduction

MCQ Questions for Class 12 Biology: Ch 3 Human Reproduction

1. Acrosome is made up of:
(a) Centrioles
(b) Ribosomes
(c) Golgi bodies
(d) Mitochondria
► (c) Golgi bodies

2. Ovum receives the sperm in the region of 
(a) Vegetal pole
(b) Equator
(c) Animal pole
(d) Pigmented area
► (c) Animal pole

3. Oogenesis starts____.
(a) At menopause
(b) Before the birth of female baby
(c) After the birth of female baby
(d) At puberty
► (b) Before the birth of female baby

4. During embryonic development, the establishment of polarity along anterior/ posterior, dorsal/ventral or medial/lateral axis is called
(a) Pattern formation
(b) Organizer phenomena
(c) Axis formation
(d) Anamorphosis
► (b) Organizer phenomena

5. Testosterone is secreted by____.
(a) Sertoli cells
(b) Leydig cells
(c) Kupffer cells
(d) Mast cells
► (b) Leydig cells

6. Human eggs are
(a) Alecithal
(b) Microlecithal
(c) Mesolecithal
(d) Macrolecithal
► (a) Alecithal

7. Antrum is the cavity of:
(a) Ovary
(b) Graafian follicle
(c) Blastula
(d) Gastrula
► (b) Graafian follicle

8. Urethra is an 8 to 10 inch long muscular tube. The urethra passes through the prostate glands and end at the_________.
(a) External urethral orifice
(b) Ejaculatory duct
(c) Seminal vesicles.
(d) Internal urethral orifice
► (a) External urethral orifice

9. The growth of corpus luteum is initiated by
(a) Human chorionic gonadotropin
(b) Follicle stimulating hormone
(c) Luteinizing hormone
(d) Prolactin
► (c) Luteinizing hormone

10. Middle piece of mammalian sperm possess
(a) Mitochondria and centriole
(b) Mitochondria only
(c) Centriole only
(d) Nucleus and mitochondria
► (b) Mitochondria only

11. The developing sperms are nourished by:
(a) Leydig cells
(b) Corpus luteum
(c) Sertoli cells
(d) Granulosa cells
► (c) Sertoli cells

12. Parturition occurs due to release of hormone oxytocin that cause_______.
(a) Stronger uterine contraction
(b) Expansion of birth canal
(c) Shrinkage of uterus
(d) Release of estrogen hormone
► (a) Stronger uterine contraction

13. Choose the incorrect statement from the following:
(a) Colostrum contains antibodies and nutrients.
(b) In birds and mammals internal fertilisation takes place.
(c) In the human female implantation occurs almost seven days after fertilisation.
(d) Polyspermy is prevented by the chemical changes in the egg surface.
► (d) Polyspermy is prevented by the chemical changes in the egg surface.

14. How many sperms are formed from a secondary spermatocyte?
(a) 2
(b) 8
(c) 4
(d) 1
► (c) 4

15. The middle layer of uterus is thick muscular myometrium that help in_________.
(a) Release of ovum from ovary.
(b) Release of female hormones.
(c) Cyclic change during menstrual cycle.
(d) Strong contraction during delivery of the baby.
► (d) Strong contraction during delivery of the baby.

16. Cervix is a part:
(a) Between uterus and vagina
(b) Of epididymis
(c) Of kidney
(d) Of fallopian tube
► (a) Between uterus and vagina

17. Fertilization in humans is practically feasible only if:
(a) The sperms are transported into vagina just after the release of ovum in fallopian tube
(b) The ovum and sperms are transported simultaneously to ampullary isthmic junction of the fallopian tube
(c) The ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix
(d) The sperms are transported into cervix within 48 hrs of release of ovum in uterus
► (b) The ovum and sperms are transported simultaneously to ampullary isthmic junction of the fallopian tube

18. Morula is a developmental stage:
(a) Between the zygote and blastocyst
(b) Between the blastocyst and gastrula
(c) Between implantation and parturition
(d) After the implantation
► (a) Between the zygote and blastocyst

19. The shared terminal duct of the reproductive and urinary system in the human male is:           
(a) Urethra
(b) Ureter
(c) Vas deferens
(d) Vasa efferentia 
► (a) Urethra

20. Inner cell mass (embryo) contain certain cells that contain cells called stem cells which have potency to_______________.
(a) Give rise hearts only
(b) Give rise only vital organs
(c) Give rise reproductive organs
(d) Give rise all the tissues and organs
► (d) Give rise all the tissues and organs

21. Fertilizins are emitted by
(a) Immature eggs
(b) Mature eggs
(c) Sperms
(d) Polar bodies
► (b) Mature eggs

22. What happen during fertilisation after all the sperm reach close to ovum?
(a) All sperms except one lose their tails.
(b) Only two sperm nearest to ovum penetrate zona pellucida
(c) Cells of corona radiate trap all the sperms except one
(d) Secretion of acrosome helps one sperm enter cytoplasm of ovum
► (d) Secretion of acrosome helps one sperm enter cytoplasm of ovum

23. A childless couple can be assisted to have a child through a technique called GIFT. The full form of this technique is:
(a) Gamete intra fallopian transfer
(b) Gamete internal fertillization and transfer
(c) Germ cell internal fallopian transfer
(d) Gamete inseminated fallopian transfer
► (a) Gamete intra fallopian transfer

24. Which one is the most likely reason of not occurring regular menstrual cycle?
(a) Fertilization of ovum
(b) Retention of corpus luteum
(c) Maintenance of hypertrophic endometrial lining
(d) Maintenance of high concentration of sex hormones
► (a) Fertilization of ovum

25. At the end of first meiotic division, male sperm differentiates into
(a) Secondary spermatocyte
(b) Primary spermatocyte
(c) Spermatogonium
(d) Spermatid
► (a) Secondary spermatocyte

26. Atretic follicles are found in the 
(a) Fallopian tubes
(b) Uterus
(c) Labia majora
(d) Ovary
► (d) Ovary

27. Which of the following events is not associated with ovulation in human female?
(a) Full development of Graffin follicle
(b) Release of secondary oocyte
(c) LH surge
(d) Decrease in estradiol 
► (d) Decrease in estradiol 

28. Withdrawal of which of the following hormones is the immediate cause of menstruation?
(a) FSH
(b) FSH-RH
(c) Progesterone
(d) Estrogen
► (c) Progesterone

29. Corpus luteum in mammals occurs in:
(a) Ovaries and produces progesterone
(b) Skin and acts as pain receptor
(c) Heart and initiates atrial contraction
(d) Brain and connects lobes of cerebrum
► (a) Ovaries and produces progesterone

30. The glandular tissue of each breast is divided into 15-20_____.
(a) Mammary lobes
(b) Ampulla
(c) Lactiferous duct
(d) Mammary duct
► (a) Mammary lobes

31. The estrous cycle is a characteristic of
(a) Human males only
(b) Human females only
(c) Mammalian males other than primates
(d) Mammalian females other than primates
► (d) Mammalian females other than primates

32. Which of the following cells during gametogenesis is normally diploid?
(a) Spermatid
(b) Spermatogonia
(c) Secondary polar body
(d) Primary polar body
► (b) Spermatogonia
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