NEET Biology Human Reproduction MCQs Set 30

Download NEET MCQs for NEET Biology: Human Reproduction

Access targeted multiple-choice questions for Human Reproduction designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Chapter-wise Objective Questions: Human Reproduction

View or download the dedicated Human Reproduction MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Biology evaluations.

Multiple Choice Questions

Question 1: If mammalian ovum fails to get fertilized, which one of the following is unlikely?
(a) Corpus luteum will disintegrate
(b) Estrogen secretion further decreases
(c) Primary follicle starts developing
(d) Progesterone secretion rapidly declines
Show Answer & Explanation

Answer: (c) Primary follicle starts developing

Explanation:
1. Primary follicles start developing mainly in follicular phase after menstrual phase.

Question 2: The number of autosomes in human primary spermatocyte is
(a) 46
(b) 44
(c) 23
(d) 22
Show Answer & Explanation

Answer: (b) 44

Explanation:
1. Primary spermatocyte is (2n) diploid having 46 chromosomes 44 2(XY) autosomes sex chromosomes.

Question 3: Corpus luteum releases
(a) Estrogen
(b) Progesterone
(c) Estrogen and progesterone
(d) Androgen
Show Answer & Explanation

Answer: (c) Estrogen and progesterone

Explanation:
1. Corpus luteum secretes large amounts of progesterone and some estrogen.

Question 4: Which one of the following statements is incorrect about menstruation?
(a) The beginning of the cycle of menstruation is called menarche
(b) During normal menstruation about 40 ml blood is lost
(c) The menstrual fluid can easily clot
(d) At menopause in the female, there is especially abrupt increase in gonadotropic hormones
Show Answer & Explanation

Answer: (c) The menstrual fluid can easily clot

Explanation:
1. Uterus secretes fibrinolytic enzyme and dissolves the clotted blood in uterus during menstrual phase.
2. Hence, blood in the menses always remains in liquid state.

Question 5: What is true about cleavage in the fertilized egg in humans?
(a) It starts while the egg is in fallopian tube
(b) It starts when the egg reaches uterus
(c) It is meroblastic
(d) It is identical to the normal mitosis
Show Answer & Explanation

Answer: (a) It starts while the egg is in fallopian tube

Explanation:
1. First cleavage is completed after 30 hours of fertilization.

Question 6: In the 28 day human ovarian cycle, the duration of luteal phase is approximately?
(a) 14 days
(b) 28 days
(c) 30 days
(d) 5 days
Show Answer & Explanation

Answer: (a) 14 days

Explanation:
1. Luteal phase or the post ovulatory phase lasts for 14 days.

Question 7: The mammalian corpus luteum produces
(a) Luteotropic hormone
(b) Luteinizing hormone
(c) Estrogen
(d) Progesterone
Show Answer & Explanation

Answer: (d) Progesterone

Explanation:
1. Corpus luteum secretes large amounts of progesterone and some estrogen.

Question 8: Fertilizin is a chemical substance produced from
(a) Polar bodies
(b) Middle piece of sperm
(c) Mature eggs
(d) Acrosome
Show Answer & Explanation

Answer: (c) Mature eggs

Explanation:
1. Fertilizin is produced by mature egg and antifertilizin is produced by sperm.
2. These are species specific.

Question 9: In the fertile human female, approximately on which day of the menstrual cycle does ovulation take place?
(a) Day 14
(b) Day 18
(c) Day 1
(d) Day 8
Show Answer & Explanation

Answer: (a) Day 14

Explanation:
1. Day of evolution = number of days in menstrual cycle – 14.
2. Normally, 28 – 14 = 14.

Question 10: Which one of the following cells, found in testes of rabbit secretes male hormone?
(a) Epithelial cells
(b) Spermatocytes
(c) Leydig’s cell
(d) Sertoli cells
Show Answer & Explanation

Answer: (c) Leydig’s cell

Explanation:
1. Leydig cells or interstitial cells secrete testosterone.

Question 11: After ovulation Graafian follicle regresses into
(a) Corpus atresia
(b) Corpus callosum
(c) Corpus luteum
(d) Corpus albicans
Show Answer & Explanation

Answer: (c) Corpus luteum

Explanation:
1. Corpus luteum is the yellow body formed after ovulation.

Question 12: Ovulation in the human female normally takes place during the menstrual cycle
(a) At the mid secretory phase
(b) Just before the end of the secretory phase
(c) At the beginning of the proliferative phase
(d) At the end of the proliferative phase
Show Answer & Explanation

Answer: (d) At the end of the proliferative phase

Explanation:
1. Menstrual phase Proliferative phase/ Secretory phase for 3 to 5 days (Follicular phase) (luteal phase) (6 to 13 days) OVULATION (14 days) 14th day (15th – 28th day).

Question 13: The shared terminal duct of the reproductive and urinary system in the human male is
(a) Urethra
(b) Ureter
(c) Vas deferens
(d) Vasa efferentia
Show Answer & Explanation

Answer: (a) Urethra

Explanation:
1. Urethra is urino-genital duct in human male.

Question 14: Assertion (A): Failure of testes to descend into the scrotum causes sterility in man.
Reason (R): Higher internal body temperature is not suitable for sperm development.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. Spermatogenesis requires 2 - 2.5°C lower than the body temperature.

Question 15: Assertion (A): Vaginal orifice is partially covered by a membrane called the hymen.
Reason (R): It is made up of thick layer of smooth muscle.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Hymen is a membranous structure, partially covering vaginal orifice.

Question 16: Assertion (A): The male urethra is longer than the female urethra.
Reason (R): It carries both urine as well as semen.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

Explanation:
1. Male urethra is about 20 cm long and female urethra is 2-4 cm.
2. In females, genital tract and urinary tract have different openings.

Question 17: Assertion (A): If fertilization occurs, the corpus luteum is rescued from regression by human chorionic gonadotropin, which is produced by placenta.
Reason (R): In first trimester the corpus luteum stimulates by hCG is responsible for the production of progesterone.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. hCG stimulates corpus luteum to secrete progesterone and estrogen for longer time.
2. After first trimester, placenta secretes sufficient progesterone.

Question 18: Assertion (A): If both the ovaries are removed after the first trimester of pregnancy, still there would be normal growth of foetus.
Reason (R): After first trimester placenta secretes sufficient progesterone.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. During first trimester, corpus luteum is responsible for secreting progesterone.
2. If both ovaries are removed during first trimester, there will be abortion.

Question 19: Assertion (A): Placenta is connected to the embryo through an umbilical cord which helps in the transport of substance to and from the embryo
Reason (R): Placenta acts as an endocrine tissue.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

Explanation:
1. Umbilical cord is not an endocrine structure.

Question 20: Assertion (A): Lack of menstruation may be indicative of pregnancy.
Reason (R): Menstruation only occurs if the released ovum is fertilised.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Menstruation occurs when released secondary ocyte remains unfertilized in a normal female.

Question 21: Assertion (A): LH acts on Sertoli cells for release of certain factors required for spermatogenesis.
Reason (R): Spermiation occurs directly under influence of LH.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (d) Both Assertion and Reason are false.

Explanation:
1. FSH acts on sertoli cells for release of factors required for spermatogenesis (Spermiogenesis).
2. Spermiation occurs directly under the influence of testosterone.

Question 22: Assertion (A): The first sign of growing foetus may be noticed by listening to the heart sound through the stethoscope.
Reason (R): By the end of second month of pregnancy, the foetus develops limbs and digits.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.

Explanation:
1. Human heart is formed after one month of pregnancy.

Question 23: Assertion (A): Leydig’s cells synthesise and secrete testicular hormones called androgens.
Reason (R): Leydig’s cells are located between the Sertoli cells.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Leydig’s cells are located outside the seminiferous tubules.

Question 24: Assertion (A): The morula passes through the phase of compaction, produces two major type of cells : the peripheral cells and the inner cell mass.
Reason (R): The descendants of inner cell mass become the trophoblast cells.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Inner cell mass becomes embryo.

Question 25: Assertion (A): Synthesis of milk is stimulated by rise in the level of oxytocin.
Reason (R): Oxytocin is released from the adenohypophysis under influence of hypothalamus.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (d) Both Assertion and Reason are false.

Explanation:
1. Ejection of milk is stimulated by rise in oxytocin.
2. Synthesis of milk is stimulated by rise in level of prolactin.

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