Free Mock Test 2026
Free NEET Human Reproduction Important MCQs Practice Test — Practice Questions
1. A solid ball of 8–16 blastomeres formed by cleavage is called:
- (A) Blastocyst
- (B) Gastrula
- (C) Morula
- (D) Zygote
Answer: (C) Morula
Cleavage divisions of the zygote form the morula, which later becomes the blastocyst.
2. Leydig cells, found in the spaces between seminiferous tubules, secrete:
- (A) FSH
- (B) Inhibin
- (C) Relaxin
- (D) Androgens
Answer: (D) Androgens
Leydig (interstitial) cells synthesise and secrete androgens such as testosterone. Sertoli cells nourish the germ cells.
3. Ovulation is induced by a sharp surge of:
- (A) LH
- (B) FSH
- (C) Progesterone
- (D) Oxytocin
Answer: (A) LH
A rapid rise in LH, the LH surge, triggers the rupture of the Graafian follicle and the release of the ovum, around the 14th day.
4. The enzymes that help the sperm penetrate the egg coverings are stored in the:
- (A) Middle piece
- (B) Acrosome
- (C) Tail
- (D) Nucleus
Answer: (B) Acrosome
The acrosome is a cap-like structure on the head that contains hydrolytic enzymes.
5. Which of the following hormones is produced only during pregnancy?
- (A) LH
- (B) hCG
- (C) Oestrogen
- (D) Testosterone
Answer: (B) hCG
hCG, hPL and relaxin are produced only during pregnancy. Oestrogen is produced in non-pregnant women too.
6. The scrotum keeps the testes at a temperature that is about:
- (A) 2–2.5°C higher than body temperature
- (B) 2–2.5°C lower than body temperature
- (C) Equal to body temperature
- (D) 10°C lower than body temperature
Answer: (B) 2–2.5°C lower than body temperature
Spermatogenesis needs a temperature slightly lower than the normal body temperature, which the scrotum provides.
7. After ovulation the corpus luteum mainly secretes:
- (A) FSH
- (B) LH
- (C) Progesterone
- (D) Relaxin
Answer: (C) Progesterone
Progesterone from the corpus luteum maintains the endometrium for implantation.
8. Strong uterine contractions at childbirth are induced by:
- (A) Prolactin
- (B) Oxytocin
- (C) FSH
- (D) Thyroxine
Answer: (B) Oxytocin
Oxytocin stimulates stronger uterine contractions, which in turn increase its release. This positive feedback leads to delivery.
9. The secretion of the seminal vesicles is rich in:
- (A) Antibodies
- (B) Lactose
- (C) Glycogen
- (D) Fructose
Answer: (D) Fructose
Seminal plasma is rich in fructose, which gives energy to the sperms, along with calcium and some enzymes.
10. Meiosis I of a primary spermatocyte gives rise to:
- (A) Spermatogonia
- (B) Spermatids
- (C) Two secondary spermatocytes
- (D) Four spermatozoa
Answer: (C) Two secondary spermatocytes
The first meiotic division is reductional and gives two haploid secondary spermatocytes.
11. One primary oocyte ultimately produces:
- (A) Four ova
- (B) Two ova and two polar bodies
- (C) Three ova and one polar body
- (D) One ovum and three polar bodies
Answer: (D) One ovum and three polar bodies
Unequal cytoplasmic division gives one large ovum and three small polar bodies.
12. The inner cell mass of the blastocyst gives rise to:
- (A) Placenta
- (B) Trophoblast
- (C) Chorion
- (D) The embryo proper
Answer: (D) The embryo proper
The inner cell mass differentiates into the embryo. The trophoblast forms the outer layer that attaches to the endometrium.
13. In a female foetus, primary oocytes are arrested at which stage of meiosis until puberty?
- (A) Metaphase II
- (B) Anaphase I
- (C) Prophase I
- (D) Telophase II
Answer: (C) Prophase I
Primary oocytes begin meiosis I during foetal life and are arrested in prophase I until puberty.
14. How many functional sperms are formed from one primary spermatocyte?
- (A) 4
- (B) 1
- (C) 2
- (D) 8
Answer: (A) 4
A primary spermatocyte undergoes meiosis I and II to form 4 spermatids, which become 4 sperms.
15. The secondary oocyte completes its second meiotic division:
- (A) At ovulation
- (B) Only after a sperm enters it
- (C) At puberty
- (D) At implantation
Answer: (B) Only after a sperm enters it
The secondary oocyte is arrested at metaphase II and completes meiosis II only when a sperm penetrates it.
16. Menstruation takes place when:
- (A) The ovum is fertilised
- (B) Ovulation occurs
- (C) The ovum is not fertilised, the corpus luteum degenerates and the endometrium breaks down
- (D) Implantation occurs
Answer: (C) The ovum is not fertilised, the corpus luteum degenerates and the endometrium breaks down
Without fertilisation the corpus luteum degenerates, progesterone falls, and the endometrium is shed.
17. The trophoblast layer of the blastocyst:
- (A) Attaches to the endometrium and helps in implantation
- (B) Forms the embryo proper
- (C) Forms the notochord
- (D) Forms the neural tube
Answer: (A) Attaches to the endometrium and helps in implantation
Trophoblast cells attach to the endometrium, and the uterine cells then divide and cover the blastocyst.
18. The first movements of the foetus and the appearance of hair on the head are usually observed during the:
- (A) Fifth month
- (B) Second month
- (C) Third month
- (D) Ninth month
Answer: (A) Fifth month
Foetal movements and hair on the head are usually seen in the fifth month of pregnancy.
19. Colostrum, the milk produced during the initial days of lactation, is rich in:
- (A) Fat only
- (B) Lactose only
- (C) Glycogen
- (D) Antibodies
Answer: (D) Antibodies
Colostrum contains antibodies that help the new-born develop resistance to infection.
20. In humans, fertilisation takes place in the:
- (A) Ampullary–isthmic junction of the fallopian tube
- (B) Uterus
- (C) Cervix
- (D) Ovary
Answer: (A) Ampullary–isthmic junction of the fallopian tube
The sperm and ovum fuse in the ampullary–isthmic junction. The embryo then moves to the uterus.