Human reproductive system 1000+ MCQ with answer for IBPS Clerk

1. 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

2. Fertilization is fusion of ..
A. Diploid spermatozoan with diploid ovum to form diploid zygote
B. Haploid spermatozoan with diploid ovum to form diploid zygote
C. Diploid spermatozoan with haploid ovum to form diploid zygote
D. Haploid spermatozoan with haploid ovum to form diploid zygote
Answer : D

3. 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

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

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

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

7. What is the name of the inner lining of the uterus?
A. Myometrium
B. Endometrium
C. Epithelium
D. Endothelium
Answer : B

8. 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

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

10. Which of the following is not a hereditary disease?
A. Cystic fibrosis
B. Thalassaemia
C. Haemophilia
D. Cretinism
Answer : D

11. HCG, HPL and relaxin are produced in women ...
A. At puberty
B. During pregnancy
C. Before puberty
D. At menopause
Answer : B

12. Tunica albuginea is related to
A. Prostate gland
B. Pituitary gland
C. Hypothalamus
D. Testes
Answer : D

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

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

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

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

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

18. 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

19. 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

20. The three primary germ layers, ectoderm, endoderm and mesoderm are differentiated during
A. Blastulation
B. Neurulation
C. Gastrulation
D. Organogenesis
Answer : C

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

22. 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

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

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

25. 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

26. 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

27. Epididymis is ...
A. A long coiled tube between vasa efferentia and vas deferens
B. Network of sinuses between seminiferous tubules and efferentia
C. Connection between vas deferens and seminal vesicle
D. Intermediate structure between the testis and vasa efferentia
Answer : A

28. In ectopic pregnancy, foetus grows in ...
A. Vagina
B. Fallopian tube
C. Uterus
D. Body cavity
Answer : B

29. The number and appearance of chromosomes in the nucleus of a eukaryotic cell is called as
A. Karyotype
B. Genotype
C. Phenotype
D. Cytogenetics
Answer : A

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

31. Hormones that control the growth and maturation of graffian follicle is
A. FSH - LH
B. FSH - ICSH
C. ACTH - LH
D. GH - ADH
Answer : A

32. During ovulation, for favourable sperm travel oestrogen causes
A. Cervical mucus to become stretchy and clear
B. Less cervical mucus production
C. Tenderness of cervix
D. Slight vaginal bleeding
Answer : A

33. 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

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

35. Fimbriae of fallopian tube ...
A. Release ovum from graffian follicle
B. Cause endometrial changes for implantation
C. Help develop corpus luteum
D. Help collection of ovum after ovulation
Answer : D

36. Which one of the following is produced early in the life of a human female?
A. Relaxin
B. Oxytocin
C. Prolactin
D. Progesterone
Answer : C

37. Temperature in scrotum necessary for sperm formation is usually ...
A. 2°c above body temperature
B. 2° c below body temperature
C. 4°c above body temperature
D. 4° c below body temperature
Answer : B

38. 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

39. Sertoli cells are found in
A. Seminiferous tubules
B. Ovaries
C. Prostate gland
D. Semen
Answer : A

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

41. Cryptorchidism is ...
A. Nondescent of testes in scrotum
B. Nondevelopment of testes
C. Removal of scrotum
D. Breaking connection of vas deferens
Answer : A

42. 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

43. Fertilization of the ovum takes place in
A. Ovary
B. Uterus
C. Fallopian tube ampulla
D. Cervix
Answer : C

44. 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

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

46. In humans female ovulation occurs during menstrual cycle
A. At the end of proliferative phase
B. At the beginning of proliferative phase
C. Before the end of secretary phase
D. In the middle of secretary phase
Answer : A

47. 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

48. Part of fallopian tube closest to ovary is
A. Infundibulum
B. Cervix
C. Ampulla
D. Isthmus
Answer :

49. 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

50. 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