ISRO Recruitment - Human reproductive system 1000+ MCQ [Solved] PDF Download

1. The chemical of the ovum that attracts and holds sperm
A. Fertilizin
B. Antifertilizin
C. Agglutin
D. Antiagglutinin
Answer : A

2. The number of chromosomes present in sperms
A. 46
B. 23
C. 23 + X
D. 23+ Y
Answer : B

3. Which layer of embryo is formed first
A. ectoderm
B. Mesoderm
C. Endoderm
D. Mesenchyma
Answer : C

4. The rate of active movement of sperm is ...
A. 1.5 -3.0 mm/min
B. 1.5 - 3.0 cm/min
C. 1.5 -3.0 m/min
D. 1.5 -3.0 m/hr
Answer : A

5. Haemophilia is more common in males because it is a
A. Recessive character carried by y-chromosome
B. Dominant character carried by y-chromosome
C. Dominant trait carried by x-chromosome
D. Recessive trait carried by x-chromosome
Answer : A

6. Mammary glands are modification of ...
A. Sebaceous glands
B. Sweat glands
C. Meibomian glands
D. None of the above
Answer : B

7. The embryonic stage that resembles a mulberry fruit is
A. Nerula
B. Gastrula
C. Morula
D. Blastula
Answer : C

8. Medical termination of pregnancy is safe till how many weeks of pregnancy?
A. 10 weeks
B. 12 weeks
C. 20 weeks
D. 22 weeks
Answer : B

9. Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan in the testis?
A. 7 days
B. 70 days
C. 7 months
D. 70 hours
Answer : B

10. The middle piece of the sperm contains
A. Protein
B. Nucleus
C. Mitochondria
D. Centriole
Answer : C

11. At the end of meiosis I, the Oocyte yields
A. Secondary Oocyte and first polar body
B. First polar body
C. Secondary Oocyte
D. Second polar body
Answer : A

12. Which part of the foetus is developed from mesoderm?
A. Heart and notochord
B. Heart and brain
C. Spinal cord and notochord
D. Brain and notochord
Answer : A

13. Thick layer which surrounds the ovum is ...
A. Zona pellucida
B. Membrana granulosa
C. Corona radiata
D. Theca interna
Answer : A

14. Erythroblastosis foetalis is caused by fertilization between the gametes of
A. Rh -ve female and rh+ ve male
B. Rh+ ve female and rh -ve male
C. Rh+ ve female and rh+ ve male
D. Rh~ ve female and rh -ve male
Answer : A

15. Haemophilic man marries a normal woman. Their off springs will be
A. All haemophilic
B. All boys haemophilic
C. All girls haemophilic
D. All normal
Answer : D

16. Acrosome occurs in the sperm in
A. Tail part
B. Behind the nucleus
C. Middle piece
D. Tip
Answer : D

17. The functional unit of testis of man is ...
A. Uriniferous tubules
B. Malpighian tubules
C. Seminiferous tubules
D. Acini or lobules
Answer : C

18. The hormone responsible for enlargement of mammary glands at puberty is
A. Progesterone
B. Oestrogen
C. Testosterone
D. Oxytocin
Answer : B

19. Immediately after ovulation, the ovum is covered by a membrane called
A. Chorion
B. Zona pellucida
C. Corona radiata
D. Vitelline membrane
Answer : B

20. In uterus, endometrium proliferates in response to ...
A. Relaxin
B. Oxytocin
C. Progesterone
D. Oestrogen
Answer : D

21. After fertilization, implantation of human embryo takes place on
A. 10 th day
B. 14 th day
C. 7 th day
D. 3 rd day
Answer : C

22. An abnormal human male phenotype involving an extra x-chromosome (xxy) is found in....
A. Edwards syndrome
B. Klinefelters syndrome
C. Intersex
D. Downs syndrome.
Answer : B

23. The male hormone testosterone is secreted by
A. Sertoli cells
B. Leydig cells
C. Crypt cells
D. Semniferous tubules
Answer : B

24. What is the best sperm extraction technique for men with obstructive azoospermia?
A. TESE - Microsurgical testicular sperm extraction
B. Percutaneous Epididymal Sperm Aspiration (PESA)
C. Intra cytoplasmic sperm injection ( ICSI)
D. Fine needle aspiration
Answer : B

25. Which part of the ovaryact as an endocrine gland in human beings
A. Stroma
B. Vitteline membrane
C. Graffian follicle
D. Epithelium
Answer : C

26. Human female reaches menopause at the age of about ...
A. 25 years
B. 35 years
C. 50 years
D. 70 years
Answer : C

27. Third phase of embryo development is ...
A. Cleavage
B. Fertilization
C. Gametogenesis
D. Gastrulation
Answer : D

28. Villi of human placenta develop from ..
A. Chorion
B. Allantois
C. Yolk sac
D. Amnion
Answer : A

29. What is Hirsuitism in females? (Usually with Poly cystic ovarian disease)
A. Unusually tall
B. Abnormal growth of facial and body hair
C. Abnormal voice
D. Short stature
Answer : B

30. Pregnancy can be detected as early as on
A. 28 th day of cycle
B. 8th week
C. 40 th day of the cycle
D. 10 th week
Answer : A

31. Cri-du-chat syndrome in humans is caused by the
A. Trisomy of 21st chromosome
B. Fertilization of an xx egg by a normal y-bearing sperm
C. Loss of half of the short arm of chromosome 5
D. Loss of half of the long arm of chromosome 5
Answer : C

32. In which phase of menstrual cycle ovulation occurs in
A. Luteal
B. Menstrual
C. Proliferative
D. Secretory
Answer : C

33. Which one takes part in formation of placenta? ...
A. Only trophoblast
B. Only allantois
C. Trophoblast and mesoderm
D. Trophoblast and mesoderm and allantois
Answer : D

34. Membrane that gives protection to embryo from external shocks is
A. Amnion
B. Allantois
C. Chorion
D. Placenta
Answer : A

35. Forensic investigation of rape case focuses on the presence of fructose in female reproductive system, the only part of the human body producing fructose is
A. Cowper's gland
B. Prostate gland
C. Testes
D. Seminal vesicle
Answer : D

36. A genetically diseased father (male) marries with a normal female and gives birth to 3 carrier girls and 5 normal sons. Find out the type of genetic disease.
A. Sex-influenced disease
B. Blood group inheritance disease
C. Sex-linked disease
D. Sex-recessive disease
Answer : C

37. The first milk which comes out just after child birth is known as .
A. Colostrum
B. Prolactin
C. Hind milk
D. Lactogen
Answer : A

38. Prostate gland produces a secretion for ...
A. Attracting sperms
B. Stimulating sperm activity
C. Inhibiting sperm activity
D. None of the above
Answer : B

39. The surgical method of contraception in males
A. Hysterectomy
B. Vasectomy
C. Castration
D. Circumcision
Answer : B

40. Chorionic gonadotropin is secreted by ...
A. Pituitary
B. Ovary
C. Placenta
D. Uterus
Answer : C

41. Name the pituitary hormone that regulates sertoli cells
A. Prolactin
B. LH
C. FSH
D. Oxytocin
Answer : C

42. Embryonic connective tissue is formed from ..
A. ectoderm
B. endoderm
C. Mesenchyme
D. Mesogloea
Answer : C

43. The most important region of the decidua for the nourishment of the conceptus is the deciduas
A. Frondosum
B. Capsularis
C. Parietalis
D. Basalis
Answer : D

44. The pre fertilisation process stage of sperm before entry into the ovum is called as
A. Maturation
B. Insemination
C. Capacitation
D. Fertilization
Answer : C

45. Fertility in women may be impaired by
A. Hypertension
B. Gall stones
C. Obesity
D. Short stature
Answer : C

46. Decreased motility of sperm <40 % is known as
A. Azoospermia
B. Oligospermia
C. Asthenozoospermia
D. Necrozoospermia
Answer : C

47. What are the chances of a normal fertile couple having a baby in one year?
A. 40%
B. 80%
C. 20%
D. 50%
Answer : B

48. Corona radiata is held by...
A. Mucopolysaccharide
B. Oligosaccharide
C. Lipopolysaccharide
D. Lipoprotein
Answer : A

49. Menstrual phase is followed by .
A. Luteal phase
B. Follicular phase
C. Fertilization
D. Implantation
Answer : B

50. Albinism is a congenital disorder resulting from the lack of which enzyme?
A. Tyrosinase
B. Xanthine oxidase
C. Catalase
D. Fructokinase.
Answer : A