Human reproductive system MCQ Solved Paper for XAT

1. Most of major organs of human embryo are formed by the
A. 16th week of pregnancy
B. 15th week of pregnancy
C. 14th week of pregnancy
D. 12th week of pregnancy
Answer : D

2. Which cells provide nutrition to the sperms?
A. Sertoli cells
B. Leydig cells
C. Crypt cells
D. Semniferous tubules
Answer : A

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

4. Human embryo is enclosed by a sac called
A. Scrotum
B. Ericardium
C. Placenta
D. Amniotic sac
Answer : D

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

6. Amniotic fluid protects the foetus from ...
A. Shock
B. Abortion
C. Degeneration
D. Disease
Answer : A

7. In infertility treatment the ovum is fertilized outside the body and injected into the uterus
A. Gamete intra fallopian transfer
B. Invitro fertilization
C. Intra uterine insemination
D. Zygote intra fallopian transfer
Answer : B

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

9. Failure of the brain to grow in the foetus may result in:
A. Plagiocephaly
B. Craniostenosis
C. Anencephaly
D. Microcephaly
Answer : D

10. 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

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

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

13. Increase in basal body temperature in the middle of menstrual cycle is a sign of
A. Fertilization
B. Onset of menstruation
C. Menopause
D. Ovulation
Answer : D

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

15. In a 28 day menstrual cycle, ovulation occurs on ...
A. Day 1
B. Day 5
C. Day 14
D. Day 28
Answer : C

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

17. When there is no fertilization, the corpus luteum ...
A. Stops secreting progesterone
B. Changes to corpus albicans
C. Starts producing progesterone
D. Begins next cycle
Answer : B

18. Normal sperm count is
A. 40 to 300 million per ml
B. 10 to 20 million per ml
C. < 10 million per ml
D. 200 million per ml
Answer : A

19. Level of estrogen and progesterone are minimum at the time of
A. Follicular phase
B. Ovulation
C. Secretory phase
D. Onset of menstrual phase
Answer : D

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

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

22. 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

23. Layers of ovum from outside to inside are .
A. Corona radiata, zona pellucida, vitelline membrane
B. Zona pellucida, corona radiata, vitelline membrane
C. Vitelline membrane, zona pellucida, corona radiata
D. Zona pellucida, vitelline membrane, corona radiate
Answer : A

24. The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the:
A. Capacitor
B. Head
C. Corona
D. Acrosome
Answer : D

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

26. Pregnancy test is confirmed by the presence of
A. Prolactin in urine
B. Relaxin in urine
C. H c g in urine
D. Fsh and lh in urine
Answer : C

27. Human eggs are
A. Mesolecithel
B. Microlecithel
C. Macrolecithel
D. Alecithel
Answer : D

28. 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

29. Which one occurs first in the human embryo
A. Neurogenesis
B. Cardiogenesis
C. Hepatogenesis
D. Osteogesis
Answer : A

30. Combined Oral contraceptives prevent pregnancy by
A. Tubal block
B. Preventing spermatogenesis
C. Forming a barrier between the ovum and sperm
D. Suppressing ovulation
Answer : D

31. In human embryo, the digestive system develops from the
A. Epithelium
B. Mesoderm
C. Endoderm
D. Ectoderm
Answer : C

32. 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

33. Secretion of testosterone is stimulated by
A. FSH
B. TSH
C. ICSH
D. ACTH
Answer : C

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

35. 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

36. Acrosome of sperm contains ...
A. Hyaluronidase and acrosin
B. Hyaluronic acid and acrosin
C. Hippuric acid and uric acid
D. Testosterone
Answer : A

37. In a semen analysis, the following is not acceptable as normal�
A. 25 % abnormal forms
B. 60% motility after 3 hours
C. Mild Alkaline reaction
D. Sperm count of 17 million per ml.
Answer : D

38. The pelvic inflammatory disease is common with which type of contraception?
A. Oral contraceptive pills
B. Diaphragms
C. Condoms
D. Intra uterine devices
Answer : D

39. Cell division that occurs in zygote is called
A. meiosis
B. Mitosis
C. Cleavage
D. Differentiation
Answer : C

40. Total numbers of ovum released in the life time of a woman is approximately
A. 40
B. 400
C. 4000
D. 20000
Answer : B

41. 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

42. 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

43. Ovulation occurs under the influence of high titre of
A. LH
B. FSH
C. Estrogen
D. Progesterone
Answer : A

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

45. Gestation period of 280 days is calculated from time of ...
A. Last menstruation
B. Fertilization
C. First day of last menstruation
D. Ovulation
Answer : C

46. What happens during fertilization when many sperms reach close to ovum ....
A. Cells of corona radiata trap all the sperm except one
B. Only two sperms nearest to ovum penetrate zona pellucida
C. Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
D. All sperms except the one nearest to ovum lose their tails
Answer : C

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

48. 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

49. 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

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