NCERT BOOK CLASS 12TH BIOLOGY MCQ
Chapter 2 : Human Reproduction
Important Multiple Choice Question (MCQs)
1. Where does sperm production occur in the testes?
a) Epididymis
b) Seminiferous tubules
c) Prostate gland
d) Vas deferens
Answer: b) Seminiferous tubules
2. Which cells secrete the male hormone testosterone?
a) Leydig cells
b) Sertoli cells
c) Spermatozoa
d) Oocytes
Answer: a) Leydig cells
3. What provides nutrition to sperms?
a) Leydig cells
b) Sertoli cells
c) Prostate gland
d) Epididymis
Answer: b) Sertoli cells
4. Where does sperm maturation occur?
a) Seminiferous tubules
b) Epididymis
c) Vas deferens
d) Urethra
Answer: b) Epididymis
5. What is the function of vas deferens?
a) Sperm production
b) Sperm storage
c) Transport sperm to urethra
d) Testosterone secretion
Answer: c) Transport sperm to urethra
6. Where does oocyte formation occur in the ovary?
a) Graafian follicle
b) Corpus luteum
c) Endometrium
d) Fallopian tube
Answer: a) Graafian follicle
7. Where does fertilization normally occur?
a) Ovary
b) Uterus
c) Fallopian tube
d) Vagina
Answer: c) Fallopian tube
8. How many ova mature per month in human females?
a) 1
b) 2
c) 5
d) 10
Answer: a) 1
9. What does corpus luteum secrete?
a) Estrogen
b) Progesterone
c) FSH
d) LH
Answer: b) Progesterone
10. What is shed during menstruation?
a) Ova
b) Endometrial lining
c) Corpus luteum
d) Graafian follicle
Answer: b) Endometrial lining
11. Where does spermatogenesis occur?
a) Epididymis
b) Seminiferous tubules
c) Prostate gland
d) Vas deferens
Answer: b) Seminiferous tubules
12. How many chromosomes does a sperm contain?
a) 23
b) 46
c) 22
d) 44
Answer: a) 23
13. When is oogenesis completed?
a) At birth
b) At puberty
c) At fertilization
d) During menstruation
Answer: c) At fertilization
14. At which stage is primary oocyte arrested?
a) Prophase I
b) Metaphase I
c) Anaphase I
d) Telophase I
Answer: a) Prophase I
15. What is present in the head of sperm?
a) Mitochondria
b) Nucleus
c) Flagellum
d) Acrosome
Answer: d) Acrosome
16. What is the duration of menstrual cycle?
a) 14 days
b) 21 days
c) 28 days
d) 35 days
Answer: c) 28 days
17. On which day does ovulation occur?
a) 1-5
b) 14
c) 21
d) 28
Answer: b) 14
18. Which hormone causes ovulation?
a) FSH
b) LH
c) Estrogen
d) Progesterone
Answer: b) LH
19. Which hormone causes endometrial thickening?
a) FSH
b) LH
c) Estrogen
d) Prolactin
Answer: c) Estrogen
20. What does corpus luteum secrete?
a) Estrogen
b) Progesterone
c) FSH
d) LH
Answer: b) Progesterone
21. Which oocyte stage does sperm fuse with during fertilization?
a) Primary oocyte
b) Secondary oocyte
c) Ovum
d) Polar body
Answer: b) Secondary oocyte
22. How many chromosomes does zygote contain?
a) 23
b) 46
c) 22
d) 44
Answer: b) 46
23. What is the outer layer of blastocyst called?
a) Trophoblast
b) Inner cell mass
c) Endometrium
d) Placenta
Answer: a) Trophoblast
24. What secretes hCG during pregnancy?
a) Ovary
b) Corpus luteum
c) Trophoblast
d) Pituitary gland
Answer: c) Trophoblast
25. What is the main function of placenta?
a) Nourish embryo
b) Secrete hormones
c) Gas exchange
d) All of above
Answer: d) All of above
26. Which hormone induces parturition?
a) Oxytocin
b) Progesterone
c) Estrogen
d) hCG
Answer: a) Oxytocin
27. Which hormone is responsible for lactation?
a) Prolactin
b) LH
c) FSH
d) Testosterone
Answer: a) Prolactin
28. What is colostrum?
a) First milk after delivery
b) Pregnancy hormone
c) Ovarian fluid
d) Seminal fluid
Answer: a) First milk after delivery
29. What is gestation period duration?
a) 6 months
b) 9 months
c) 12 months
d) 3 months
Answer: b) 9 months
30. What are uterine contractions during delivery called?
a) Ovulation
b) Labor pain
c) Fertilization
d) Zygote formation
Answer: b) Labor pain
31. Which is a contraceptive method?
a) Condom
b) Oral pills
c) IUD
d) All of above
Answer: d) All of above
32. Emergency contraceptives are based on which hormone?
a) Estrogen
b) Progesterone
c) LH
d) FSH
Answer: b) Progesterone
33. What does amniocentesis detect?
a) Fetal sex
b) Genetic disorders
c) Blood group
d) Hormone levels
Answer: b) Genetic disorders
34. AIDS is caused by?
a) HIV virus
b) Bacteria
c) Protozoa
d) Fungi
Answer: a) HIV virus
35. What is essential for safe sex?
a) Condom use
b) Regular checkups
c) Sex education
d) All of above
Answer: d) All of above
36. Fusion of male and female gametes is called?
a) Fertilization
b) Ovulation
c) Zygote formation
d) Embryonic development
Answer: a) Fertilization
37. What determines sex in humans?
a) Ovum
b) Sperm
c) Uterus
d) Placenta
Answer: b) Sperm
38. Infertility may result from deficiency of?
a) FSH
b) LH
c) Testosterone
d) All of above
Answer: d) All of above
39. IVF technique is called?
a) Test tube baby
b) Cloning
c) Gene therapy
d) Egg donation
Answer: a) Test tube baby
40. What does abortion mean?
a) Intentional termination of pregnancy
b) Spontaneous miscarriage
c) Fertilization failure
d) Embryo growth arrest
Answer: a) Intentional termination of pregnancy
41. What is spermatogenesis?
a) Ovum formation
b) Sperm formation
c) Hormone secretion
d) Zygote division
Answer: b) Sperm formation
42. Oogenesis occurs in?
a) Male
b) Female
c) Both
d) Plants
Answer: b) Female
43. What is menarche?
a) Cessation of menstruation
b) First menstruation
c) Ovulation
d) Pregnancy
Answer: b) First menstruation
44. Menopause is related to?
a) Pregnancy
b) Cessation of menstruation
c) Fertilization
d) Puberty
Answer: b) Cessation of menstruation
45. What is endometriosis?
a) Growth of uterine lining outside uterus
b) Ovarian cysts
c) Low sperm count
d) Hormonal imbalance
Answer: a) Growth of uterine lining outside uterus
46. In male reproductive system, if ‘X’ is seminiferous tubules, what is ‘Y’?
a) Epididymis
b) Leydig cells
c) Vas deferens
d) Prostate
Answer: b) Leydig cells
47. Which letter represents fallopian tube in female reproductive system?
a) A
b) B
c) C
d) D
Answer: b) B
48. What is structure ‘Z’ formed after fertilization?
a) Zygote
b) Blastocyst
c) Embryo
d) Placenta
Answer: a) Zygote
49. When is hCG level highest during pregnancy?
a) First trimester
b) Second trimester
c) Third trimester
d) After delivery
Answer: a) First trimester
50. Which hormone peaks on day 14 of menstrual cycle?
a) FSH
b) LH
c) Estrogen
d) Progesterone
Answer: b) LH
51. When does embryonic heart start beating?
a) 2nd week
b) 4th week
c) 6th week
d) 8th week
Answer: b) 4th week
52. Placenta is formed by?
a) Trophoblast and uterine cells
b) Only maternal tissues
c) Only fetal tissues
d) Ovarian cells
Answer: a) Trophoblast and uterine cells
53. Which hormone prevents uterine contractions during pregnancy?
a) Oxytocin
b) Progesterone
c) Estrogen
d) hCG
Answer: b) Progesterone
54. From which week is it called fetus?
a) 4th week
b) 8th week
c) 12th week
d) 20th week
Answer: b) 8th week
55. Functions of amniotic fluid include?
a) Cushioning fetus
b) Temperature regulation
c) Facilitating fetal movement
d) All of above
Answer: d) All of above
56. What is azoospermia?
a) Absence of sperms
b) Absence of ova
c) Uterine infection
d) Hormonal imbalance
Answer: a) Absence of sperms
57. PCOS is related to?
a) Ovarian cysts
b) Uterine tumors
c) Low sperm count
d) Thyroid disorder
Answer: a) Ovarian cysts
58. Symptoms of endometriosis include?
a) Pelvic pain
b) Irregular periods
c) Infertility
d) All of above
Answer: d) All of above
59. Example of STD is:
a) Syphilis
b) Gonorrhea
c) AIDS
d) All of above
Answer: d) All of above
60. Hydrocele is related to?
a) Fluid accumulation in testes
b) Ovarian cysts
c) Uterine bleeding
d) Blockage in sperm ducts
Answer: a) Fluid accumulation in testes
61. Where is embryo transferred in IVF?
a) Ovary
b) Fallopian tube
c) Uterus
d) Vagina
Answer: c) Uterus
62. What is IUI?
a) Direct sperm placement in uterus
b) Fertilizing egg
c) Freezing embryo
d) Hormone injection
Answer: a) Direct sperm placement in uterus
63. In surrogacy, where does embryo develop?
a) Surrogate’s uterus
b) Laboratory
c) Vagina
d) Ovary
Answer: a) Surrogate’s uterus
64. What is cryopreservation?
a) Freezing embryos
b) Destroying sperms
c) Keeping eggs fresh
d) Cleaning uterus
Answer: a) Freezing embryos
65. Genome editing technique is:
a) CRISPR-Cas9
b) IVF
c) IUI
d) GIFT
Answer: a) CRISPR-Cas9
66. Full form of FSH?
a) Follicle Stimulating Hormone
b) Fast Sperm Hormone
c) Female Sex Hormone
d) Fertility Stabilizing Hormone
Answer: a) Follicle Stimulating Hormone
67. Main function of LH?
a) Stimulate ovaries
b) Inhibit sperm production
c) Contract uterus
d) Increase milk production
Answer: a) Stimulate ovaries
68. Prolactin affects?
a) Mammary glands
b) Ovaries
c) Testes
d) Thyroid
Answer: a) Mammary glands
69. Function of relaxin hormone?
a) Loosen pelvic ligaments for delivery
b) Increase milk production
c) Uterine contraction
d) Oocyte formation
Answer: a) Loosen pelvic ligaments for delivery
70. What secretes hCG?
a) Pituitary
b) Placenta
c) Ovary
d) Corpus luteum
Answer: b) Placenta
71. Human gametes are:
a) Haploid
b) Diploid
c) Triploid
d) Polyploid
Answer: a) Haploid
72. After fertilization, zygote undergoes:
a) Mitosis
b) Meiosis
c) Reduction division
d) No division
Answer: a) Mitosis
73. Oral contraceptives are based on:
a) Estrogen and progesterone
b) Testosterone
c) LH
d) FSH
Answer: a) Estrogen and progesterone
74. Reason for size difference between male and female gametes:
a) Sperm motility
b) Nutrient reserve in ovum
c) Hormone levels
d) Chromosome number
Answer: b) Nutrient reserve in ovum
75. Correct statement about human reproduction:
a) Fertilization occurs in fallopian tube
b) Embryo develops in uterus
c) hCG helps detect pregnancy
d) All of above
Answer: d) All of above