Quiz - biology - Human Reproduction-A & R questions

Q1. Assertion: Granulosa cells immediately surrounding the acellular layer of a secondary oocyte become elongated and are referred to as the zona pellucida.
Reason: The corpus haemorrhagicum retains the zona pellucida. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q2. Assertion: The production of female gametes is limited throughout a woman's life.
Reason: The majority of primary follicles undergo atresia (degeneration) during the reproductive years. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q3. Assertion: In the menstrual phase, small secondary follicles in the ovary begin to grow as the uterus sheds its lining.
Reason: The degeneration of the corpus luteum leads to higher levels of estrogen in the blood. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q4. Assertion: The level of LH surges around the 14th day, triggering ovulation.
Reason: A high level of estrogen (in the absence of progesterone) provides positive feedback on FSH and LH. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q5. Assertion: The fate of the corpus luteum is dependent on whether fertilization occurs.
Reason: In a pregnant female, a spike in the level of hCG is seen in the blood around 8 days, which helps maintain the corpus luteum. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q6. Assertion: The corpus luteum is considered a temporary endocrine structure.
Reason: The corpus luteum maintains the supply of estrogen, progesterone, relaxin, and inhibin during the menstrual cycle. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q7. Assertion: A decrease in estrogen levels leads to osteoporosis.
Reason: Estrogens are synergistic with growth hormone and can also promote osteoblast activity. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q8. Assertion: Women under the age of 50 have a much lower risk of Coronary Artery Disease (CAD) compared to men of the same age.
Reason: Estrogen lowers blood cholesterol. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q9. Assertion: Amenorrhea (the absence of menstruation) may be an indicator of pregnancy.
Reason: During pregnancy, the corpus luteum is sustained, and the endometrial lining is not shed. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q10. Assertion: Pregnancy is most likely to occur if intercourse takes place within a 3-day window, from 2 days before ovulation to 1 day after.
Reason: The viability of sperm and a secondary oocyte within the female genital tract is approximately 48 hours and 24 hours, respectively. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q11. Assertion: Fraternal twins are genetically dissimilar.
Reason: They are formed from two different zygotes at the same time. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q12. Assertion: Monozygotic twins are always of the same sex.
Reason: A single embryo separates into two. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q13. Assertion: Conjoined twins are genetically identical and are of the same sex.
Reason: Conjoined twins are a rare condition that occurs when an embryo fails to completely separate into two before 8 days of development. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q14. Assertion: Not all acts of copulation lead to fertilization and pregnancy.
Reason: For fertilization to occur, both the ovum (secondary oocyte) and sperm must be transported to the ampullary-isthmic junction simultaneously. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q15. Assertion: In humans, the entire sperm cell enters the egg during fertilization.
Reason: The parts of the sperm, except for the nucleus and the proximal centriole, are destroyed after entering the egg. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q16. Assertion: Oocytes enter the fallopian tube when they are released from the ovary.
Reason: The fallopian tube is lined by squamous epithelium. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q17. Assertion: The middle piece of a sperm facilitates motility, which is essential for fertilization.
Reason: The middle piece contains mitochondria to produce energy. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q18. Assertion: The cementing substance between the cells of the corona radiata is dissolved by the enzyme hyaluronidase.
Reason: The source of this enzyme is the acrosome, which is a modified lysosome. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q19. Assertion: A man has a single, chestnut-shaped prostate gland that contributes an alkaline component to the semen.
Reason: The alkalinity of semen is primarily achieved through secretions from the seminal vesicles, which are unpaired glands. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q20. Assertion: A significant increase in GnRH from the hypothalamus initiates spermatogenesis at puberty.
Reason: GnRH acts on the anterior pituitary (adenohypophysis) to release two gonadotropins. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q21. Assertion: Although a male ejaculate contains 200-300 million sperm, very few of them reach the site of fertilization.
Reason: Most sperm are killed by the acidic environment of the female reproductive tract. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q22. Assertion: An oophorectomy (removal of ovaries) in the first trimester of pregnancy may lead to a miscarriage.
Reason: The hormones essential to maintain pregnancy are primarily produced by the corpus luteum throughout the entire pregnancy. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q23. Assertion: During cleavage, the resulting blastomeres do not grow, and the total size and volume of the embryo remain unchanged.
Reason: In cleavage division, the interphase is without a growth (G1 and G2) phase. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q24. Assertion: The inner cell mass (epiblast) is the source of all the germ layers in the embryo.
Reason: Morphogenetic movements occur during blastocyst formation. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q25. Assertion: During parturition, oxytocin receptors develop on the perimetrium of the uterus.
Reason: Perimetrial contraction is needed for the expulsion phase. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q26. Assertion: The presence of a hymen is a reliable indicator of virginity.
Reason: The hymen is always torn during the first sexual experience. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q27. Assertion: The part of the oviduct closest to the ovary is the funnel-shaped infundibulum.
Reason: It has numerous finger-like projections called fimbriae to collect sperm after spermiation. Source: orcusprep.in

NEET Recommended MCQ A & R

hard

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q28. Assertion: hCG is the basis of pregnancy tests (gravidex test).
Reason: hCG appears in the urine shortly after implantation. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q29. Assertion: Meiotic division during oogenesis is unequal.
Reason: The secondary oocyte retains the bulk of the nutrient-rich cytoplasm of the primary oocyte, which will be utilized later. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q30. Assertion: The placenta acts as a temporary endocrine tissue and produces several hormones.
Reason: hCG, hPL, and estrogen are produced only during pregnancy. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q31. Assertion: The foetal ejection reflex originates from signals from the fully developed fetus and the mother's placenta.
Reason: This reflex triggers the release of oxytocin from the posterior pituitary. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q32. Assertion: The initial milk produced during the first few days of lactation is called colostrum.
Reason: It is rich in IgM antibodies. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q33. Assertion: The vagina contains mucus glands that produce mucus for lubrication.
Reason: The vaginal orifice is completely covered by a membranous diaphragm called the hymen. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q34. Assertion: Each breast contains approximately 15-20 mammary lobes, which are composed of numerous lobules.
Reason: Each lobule is made up of grape-like structures called alveoli where milk is stored. Source: orcusprep.in

NEET Recommended MCQ A & R

easy

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

Q35. Assertion: By the end of the first trimester, most of the major organ systems have been formed.
Reason: Medical Termination of Pregnancy (MTP) during the first trimester is a high-risk procedure. Source: orcusprep.in

NEET Recommended MCQ A & R

medium

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

If Assertion is true but the Reason is false.

If both Assertion and Reason are false.

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Biology - Human Reproduction-A & R questions

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Biology - Human Reproduction-A & R questions

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