Class 12 Biology Chapter 3: Human Reproduction – 100 MCQs with Answers
1. Where does fertilization normally take place in humans?
Answer: C) Fallopian tube
2. The functional unit of human testis is:
Answer: A) Seminiferous tubule
3. Which cell secretes testosterone?
Answer: C) Leydig cell
4. Ovulation is triggered by a surge of which hormone?
Answer: C) LH
5. Menstrual cycle is normally:
Answer: B) 28 days
6. Which is the site of spermatogenesis?
Answer: C) Seminiferous tubule
7. Which hormone is primarily responsible for development of secondary sexual characteristics in males?
Answer: C) Testosterone
8. The uterus is lined by:
Answer: C) Endometrium
9. Which cell forms the blood-testis barrier?
Answer: B) Sertoli cell
10. Site of maturation and storage of sperm is:
Answer: A) Epididymis
11. The menstrual cycle starts with:
Answer: C) Menstruation
12. The follicle that is released during ovulation is:
Answer: B) Graafian follicle
13. When is the endometrium of uterus thickest?
Answer: B) After ovulation
14. Site of sperm capacitation:
Answer: C) Female reproductive tract
15. Which enzyme dissolves corona radiata around the ovum?
Answer: B) Acrosin
16. Which layer prevents polyspermy?
Answer: A) Zona pellucida
17. Main function of corpus luteum:
Answer: B) Progesterone production
18. Acrosome is formed from:
Answer: B) Golgi body
19. The fertilized egg attaches to:
Answer: C) Endometrium
20. The hormone that maintains pregnancy:
Answer: B) Progesterone
21. Which part of sperm contains mitochondria?
Answer: B) Middle piece
22. The outermost layer of the ovum is:
Answer: C) Corona radiata
23. Which structure in male stores and matures sperm?
Answer: C) Epididymis
24. The life span of human sperm in the female tract is approximately:
Answer: B) 24–48 hours
25. In human females, which hormone peaks just before ovulation?
Answer: B) LH
26. The placenta is formed by:
Answer: C) Both A and B
27. Which event signals the beginning of pregnancy?
Answer: C) Implantation
28. Which gland contributes the most to the volume of semen?
Answer: C) Seminal vesicle
29. Which hormone is detected in a pregnancy test?
Answer: C) HCG
30. Sertoli cells are located in:
Answer: C) Seminiferous tubules
31. The hormone FSH in females:
Answer: B) Stimulates follicle growth
32. What is the function of the corpus luteum?
Answer: C) Secrete progesterone
33. Surgery to block fallopian tubes is known as:
Answer: B) Tubectomy
34. The part of sperm containing enzymes for fertilization:
Answer: D) Acrosome
35. Uterine cycle occurs under influence of:
Answer: B) Estrogen and progesterone
36. Which structure is NOT part of the male reproductive system?
Answer: A) Uterus
37. In which phase of menstrual cycle does ovulation generally occur?
Answer: C) Ovulatory
38. Chromosomal constitution of human sperm:
Answer: B) 22 + X or 22 + Y
39. What is the total number of chromosomes in human zygote?
Answer: B) 46
40. Sperm’s motility is due to:
Answer: B) Flagellum
91. The hormone needed for milk ejection is:
Answer: B) Oxytocin
92. Implantation normally occurs:
Answer: B) 7 days after fertilization
93. Placenta produces:
Answer: D) All of these
94. An ovum is viable for fertilization for:
Answer: B) 12–24 hours
95. Semen is:
Answer: B) Sperm + secretions
96. A normal human sperm has:
Answer: D) All
97. Which provides nourishment to sperm?
Answer: C) Sertoli cell
98. The functional changes in sperm before fertilization are called:
Answer: A) Capacitation
99. The hormone detected in urine during early pregnancy is:
Answer: A) HCG
100. The release of ovum from the ovary is called:
Answer: C) Ovulation