Human Reproduction – Daily Practice Problem (DPP)

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🎯 NEET 2026 Daily Practice Problem (DPP)

Class 12 | Unit 1: Reproduction | Topic: Human Reproduction

Q1. The temperature of the scrotum which is necessary for spermatogenesis is:

  1. 2–2.5°C higher than body temperature
  2. 2–2.5°C lower than body temperature
  3. Same as body temperature
  4. 4–5°C lower than body temperature
✅ View Answer & Explanation

Correct Answer: (2) 2–2.5°C lower than body temperature
Explanation: The scrotum is situated outside the abdominal cavity to maintain the testes at a temperature lower than the internal body temperature, which is essential for sperm production.

Q2. Sertoli cells are regulated by the pituitary hormone known as:

  1. LH
  2. FSH
  3. GH
  4. Prolactin
✅ View Answer & Explanation

Correct Answer: (2) FSH
Explanation: FSH acts on the Sertoli cells and stimulates the secretion of some factors (like ABP) which help in the process of spermiogenesis. LH acts on Leydig cells.

Q3. Which part of the fallopian tube is closest to the ovary?

  1. Isthmus
  2. Infundibulum
  3. Cervix
  4. Ampulla
✅ View Answer & Explanation

Correct Answer: (2) Infundibulum
Explanation: The part closest to the ovary is the funnel-shaped infundibulum, which possesses finger-like projections called fimbriae.

[Image of female reproductive system]

Q4. Seminal plasma in humans is rich in:

  1. Fructose and calcium but has no enzymes
  2. Glucose and certain enzymes but has no calcium
  3. Fructose and certain enzymes but poor in calcium
  4. Fructose, calcium and certain enzymes
✅ View Answer & Explanation

Correct Answer: (4) Fructose, calcium and certain enzymes
Explanation: The secretions of the male accessory glands (seminal vesicles, prostate, bulbourethral) constitute the seminal plasma.

Q5. The final release of sperms from the seminiferous tubules is called:

  1. Spermiation
  2. Spermiogenesis
  3. Spermatogenesis
  4. Ejaculation
✅ View Answer & Explanation

Correct Answer: (1) Spermiation
Explanation: After spermiogenesis, sperm heads become embedded in Sertoli cells and are finally released from the tubules by spermiation.

Q6. Which layer of the uterus exhibits strong contraction during delivery of the baby?

  1. Perimetrium
  2. Myometrium
  3. Endometrium
  4. Mesometrium
✅ View Answer & Explanation

Correct Answer: (2) Myometrium
Explanation: The middle thick layer of smooth muscle (myometrium) exhibits strong contractions during parturition.

Q7. The proliferative phase of the menstrual cycle is also called:

  1. Secretory phase
  2. Luteal phase
  3. Follicular phase
  4. Menstrual phase
✅ View Answer & Explanation

Correct Answer: (3) Follicular phase
Explanation: During this phase, primary follicles in the ovary grow to become a fully mature Graafian follicle, and the endometrium regenerates through proliferation.

Q8. The LH surge occurs on which day of a typical 28-day menstrual cycle?

  1. 5th day
  2. 14th day
  3. 20th day
  4. 28th day
✅ View Answer & Explanation

Correct Answer: (2) 14th day
Explanation: Rapid secretion of LH leading to its maximum level during the mid-cycle (14th day) is called LH surge, which induces ovulation.

Q9. Capacitation occurs in:

  1. Epididymis
  2. Vas deferens
  3. Female reproductive tract
  4. Rete testis
✅ View Answer & Explanation

Correct Answer: (3) Female reproductive tract
Explanation: Capacitation refers to the functional maturation of sperm (removal of membrane cholesterol/glycoproteins) that allows them to fertilize the egg.

Q10. The hormone HCG (Human Chorionic Gonadotropin) is secreted by:

  1. Ovary
  2. Placenta
  3. Pituitary
  4. Corpus luteum
✅ View Answer & Explanation

Correct Answer: (2) Placenta
Explanation: The placenta acts as an endocrine tissue and produces hCG, hPL, estrogens, and progesterone. hCG maintains the corpus luteum.

Q11. Which structure implants into the endometrium of the uterus?

  1. Zygote
  2. Morula
  3. Blastocyst
  4. Gastrula
✅ View Answer & Explanation

Correct Answer: (3) Blastocyst
Explanation: The embryo with 8-16 blastomeres (morula) continues to divide to form the blastocyst. The trophoblast layer of the blastocyst attaches to the endometrium.

Q12. What ensures that only one sperm can fertilize an ovum?

  1. Corona radiata
  2. Zona pellucida
  3. Acrosome
  4. Cortical reaction
✅ View Answer & Explanation

Correct Answer: (2) Zona pellucida changes / Cortical reaction
Explanation: Contact of the sperm with the zona pellucida induces changes (depolarization/cortical reaction) in the membrane that block the entry of additional sperms (blocks polyspermy).

Q13. The signals for parturition originate from:

  1. Fully developed foetus only
  2. Placenta only
  3. Placenta as well as fully developed foetus
  4. Oxytocin released from maternal pituitary
✅ View Answer & Explanation

Correct Answer: (3) Placenta as well as fully developed foetus
Explanation: The signals originate from the foetus and placenta which induce mild uterine contractions called the foetal ejection reflex.

Q14. Colostrum is rich in which type of antibodies?

  1. IgG
  2. IgA
  3. IgM
  4. IgE
✅ View Answer & Explanation

Correct Answer: (2) IgA
Explanation: Colostrum (the milk produced during the initial days of lactation) contains several antibodies (IgA) essential for developing resistance in the newborn.

Q15. Meiosis II in the secondary oocyte is completed:

  1. At the time of ovulation
  2. Inside the ovary
  3. At the time of entry of sperm into ovum (fertilization)
  4. Before birth
✅ View Answer & Explanation

Correct Answer: (3) At the time of entry of sperm into ovum
Explanation: The secondary oocyte is arrested at Metaphase II. Meiosis II is completed only when the sperm enters the ovum, forming the second polar body and ootid.

Q16. The corpus luteum secretes large amounts of:

  1. LH
  2. FSH
  3. Estrogen
  4. Progesterone
✅ View Answer & Explanation

Correct Answer: (4) Progesterone
Explanation: Progesterone is essential for the maintenance of the endometrium and is thus called the pregnancy hormone.

Q17. The first sign of growing foetus may be noticed by:

  1. Movement of foetus
  2. Appearance of hair on head
  3. Listening to the heart sound
  4. Formation of limbs
✅ View Answer & Explanation

Correct Answer: (3) Listening to the heart sound
Explanation: The first sign is usually noticing the heart sound after one month of pregnancy.

Q18. The function of the Acrosome is to:

  1. Provide energy for movement
  2. Help in fertilization by releasing enzymes
  3. Contain genetic material
  4. Provide nutrition
✅ View Answer & Explanation

Correct Answer: (2) Help in fertilization by releasing enzymes
Explanation: The acrosome contains enzymes (sperm lysins/hyaluronidase) that help the sperm penetrate the ovum.

Q19. Which of the following depicts the correct pathway of transport of sperms?

  1. Rete testis → Efferent ductules → Epididymis → Vas deferens
  2. Rete testis → Epididymis → Efferent ductules → Vas deferens
  3. Rete testis → Vas deferens → Efferent ductules → Epididymis
  4. Efferent ductules → Rete testis → Vas deferens → Epididymis
✅ View Answer & Explanation

Correct Answer: (1) Rete testis → Efferent ductules → Epididymis → Vas deferens
Explanation: Seminiferous tubules open into the rete testis, then vasa efferentia (efferent ductules), epididymis, and finally vas deferens.

Q20. In the absence of fertilization, the corpus luteum degenerates into:

  1. Corpus callosum
  2. Corpus albicans
  3. Graafian follicle
  4. Primary follicle
✅ View Answer & Explanation

Correct Answer: (2) Corpus albicans
Explanation: If fertilization does not occur, the corpus luteum degenerates into a white scar tissue called corpus albicans, leading to menstruation.

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