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NEET UG Human Reproduction — practice questions

Explore 103 free Human Reproduction questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Human Reproduction questions and exercises with answers

Showing questions 1–30 of 103.

For normal male fertility, at least what percentage of ejaculated sperms must show vigorous motility?Read the answer and worked solution →At puberty, approximately how many primary follicles remain in each ovary?Read the answer and worked solution →The new membrane that forms around the secondary oocyte just before ovulation is called the:Read the answer and worked solution →In human females, the first menstruation at puberty is termed:Read the answer and worked solution →The average menstrual cycle in human females lasts approximately:Read the answer and worked solution →The menstrual phase normally lasts approximately:Read the answer and worked solution →The reproductive phase in women, marked by cyclic menstruation, extends between:Read the answer and worked solution →After fertilisation, the resulting zygote first undergoes cleavage as it moves through the:Read the answer and worked solution →The embryo with 8–16 blastomeres is called the:Read the answer and worked solution →In a blastocyst, the outer layer attaching to the endometrium is the *trophoblast*, and the inner cluster that differentiates into the embryo is the:Read the answer and worked solution →The structural and functional unit between the developing foetus and maternal body that supports exchange of gases, nutrients and wastes is the:Read the answer and worked solution →Which of the following hormones is produced by the placenta during pregnancy?Read the answer and worked solution →Which hormone, secreted by the ovary in the later phase of pregnancy, is produced *only* during pregnancy?Read the answer and worked solution →By the end of which month/period of pregnancy is the human embryo's heart formed?Read the answer and worked solution →The average gestation period in humans is approximately:Read the answer and worked solution →The mild uterine contractions originating from the fully developed foetus and placenta that initiate parturition are called the:Read the answer and worked solution →The hormone primarily responsible for stronger uterine contractions during parturition is:Read the answer and worked solution →The first milk produced during the initial few days of lactation, rich in antibodies essential for the newborn's immunity, is called:Read the answer and worked solution →Which of the following statements is TRUE?Read the answer and worked solution →How many chromosomes are present in a normal human zygote immediately after fertilisation?Read the answer and worked solution →The testes are held outside the abdominal cavity in a pouch called the:Read the answer and worked solution →The scrotum keeps the testes at a temperature that is:Read the answer and worked solution →Each testis contains about how many testicular lobules?Read the answer and worked solution →Sperms are produced inside coiled tubes called:Read the answer and worked solution →A seminiferous tubule is lined by Sertoli cells and:Read the answer and worked solution →Male germ cells form sperm by divisions that are:Read the answer and worked solution →Sertoli cells in the tubule provide the germ cells with:Read the answer and worked solution →Regions outside the seminiferous tubules are called:Read the answer and worked solution →Interstitial cells of the testis are also known as:Read the answer and worked solution →The primary female sex organs are the:Read the answer and worked solution →

Worked practice questions

For normal male fertility, at least what percentage of ejaculated sperms must show vigorous motility?

  1. 80%
  2. 40%
  3. 20%
  4. 60%
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Correct answer: B. 40%

As per your syllabus, at least **40% vigorous motility** AND at least **60% normal shape/size** are required for normal fertility.

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At puberty, approximately how many primary follicles remain in each ovary?

  1. 1 - 2 million
  2. 60,000 - 80,000
  3. 5 - 10 million
  4. 1,000 - 2,000
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Correct answer: B. 60,000 - 80,000

A large number of primary follicles degenerate during the phase from birth to puberty. Only **60,000–80,000 primary follicles** remain in each ovary at puberty.

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The new membrane that forms around the secondary oocyte just before ovulation is called the:

  1. Zona pellucida
  2. Theca interna
  3. Vitelline membrane
  4. Corona radiata
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Correct answer: A. Zona pellucida

The **zona pellucida** is the glycoprotein membrane that surrounds the secondary oocyte. Sperm must penetrate it to fertilise the ovum, and after entry of one sperm it blocks further sperms.

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More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationPrinciples of Inheritance and VariationAnimal Kingdom