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All Free Biology MCQs with Answers

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19,844 questions · page 788 of 993

15741. Primary spermatocytes undergo meiotic division to form:

  • A. Spermatids
  • B. Secondary spermatocytes
  • C. Sperms
  • D. Spermatogonia

Explanation: Primary spermatocyte undergoes first meiotic division to give rise to two secondary spermatocytes which undergo second meiotic division to…

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Correct answer: Secondary spermatocytes

15742. Secondary spermatocytes give rise to spermatids through:

  • A. Meiosis-I
  • B. Meiosis-II
  • C. Mitosis
  • D. Repeated division

Explanation: Spermatogonia differentiates into primary spermatophytes which undergo meiotic division to form secondary spermatocytes and spermatids…

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Correct answer: Meiosis-II

15743. Secondary spermatocytes originate from:

  • A. Primary spermatocytes
  • B. Sperms
  • C. Spermatogonia
  • D. Spermatids

Explanation: Spermatogonia differentiates into primary spermatophytes which undergo meiotic division to form secondary spermatocytes and spermatids…

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Correct answer: Primary spermatocytes

15744. This hormone develops the endometrium and makes it receptive for the implantation of zygote:

  • A. Estrogen
  • B. Progesterone
  • C. FSH
  • D. ICSH

Explanation: The correct answer is Progesterone. Progesterone is essential for preparing the endometrium, making it suitable for the implantation of a…

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Correct answer: Progesterone

15745. The discharge of blood and cell debris from vagina at the end of reproductive cycle is called:

  • A. Gestation
  • B. After birth
  • C. Menstruation
  • D. Implantation

Explanation: The correct term for the discharge of blood and cell debris from the vagina at the end of the reproductive cycle is menstruation.

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Correct answer: Menstruation

15746. The human menstrual cycle generally repeats every_days.

  • A. 26
  • B. 27
  • C. 28
  • D. 29

Explanation: The human menstrual cycle generally averages 28 days, although it can vary from person to person.

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Correct answer: 28

15747. The uterine cycle in humans involve the preparation of the uterine wall to receive the_if fertilization occurs.

  • A. Ovum
  • B. Egg
  • C. Embryo
  • D. Zygote

Explanation: Uterine wall (endometrium) prepares itself for the implantation of fertilized zygote.

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Correct answer: Zygote

15748. The ovary under the stimulus of_, also produce_.

  • A. FSH, LH
  • B. FSH, Estrogen
  • C. LH, FSH
  • D. Estrogen, Progesterone

Explanation: The correct answer is FSH, Estrogen. Follicle-stimulating hormone (FSH) is responsible for stimulating the ovaries to produce estrogen…

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Correct answer: FSH, Estrogen

15749. On which date is a woman most likely to ovulate if the first day of menstrual cycle was first april?

  • A. 5 April
  • B. 14 April
  • C. 20 April
  • D. 28 April

Explanation: Because secretory (Luteal/postovulatory) phase has fixed number of days (15-28).

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Correct answer: 14 April

15750. Primary oocyte divides meiotically to form:

  • A. Secondary oocytes
  • B. Primary oocytes
  • C. Ovum
  • D. Egg

Explanation: Based on the explanations provided, the correct answer to the question is option A) Secondary oocytes.

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Correct answer: Secondary oocytes

15751. In human females, the periodic reproductive cycle is completed in approximately_days:

  • A. 20
  • B. 28
  • C. 30
  • D. 40

Explanation: Based on the explanations provided, the correct answer to the question is option B) 28 days.

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Correct answer: 28

15752. This hormone develops the endometrium and make it receptive for the implantation of the zygote (placenta formation):

  • A. Androgen
  • B. FSH
  • C. LH
  • D. Progesterone

Explanation: Based on the explanations provided, the correct answer to the question is option D) Progesterone.

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Correct answer: Progesterone

15753. Vascularization of endometrium is induced by:

  • A. LH
  • B. Progesterone
  • C. Estrogen
  • D. Testosterone

Explanation: Based on the explanations provided, the correct answer to the question is option C) Estrogen.

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Correct answer: Estrogen

15754. Pick up the shortest phase of uterine cycle:

  • A. Menstruation phase
  • B. Proliferative phase
  • C. Secretory phase
  • D. Luteal phase

Explanation: Based on the explanations provided, the correct answer to the question is option A) Menstruation Phase.

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Correct answer: Menstruation phase

15755. The hormone which stimulates and vascularizes the endometrium:

  • A. LH
  • B. FSH
  • C. Progesterone
  • D. Estrogen

Explanation: Based on the explanations provided, the correct answer to the question is option D) Estrogen.

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Correct answer: Estrogen

15756. The hormone, produced by the corpus luteum, that promotes the development of the uterine lining in females is called:

  • A. LH
  • B. FSH
  • C. Progesterone
  • D. Estrogen

Explanation: Based on the explanations provided, the correct answer to the question is option C) Progesterone.

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Correct answer: Progesterone

15757. Pick up the inner lining of uterus:

  • A. Ectometrium
  • B. Myometrium
  • C. Endometrium
  • D. Perimetrium

Explanation: Based on the explanations provided, the correct answer to the question is option C) Endometrium.

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Correct answer: Endometrium

15758. _cycle is a reproductive cycle found in all female mammals, EXCEPT human being:

  • A. Menstrual
  • B. Ovarian
  • C. Oestrous
  • D. Uterine

Explanation: The oestrous cycle is a reproductive cycle found in most non-primate mammals, including domestic animals like dogs, cats, and cows.

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Correct answer: Oestrous

15759. The release of a_is timed to coincide with the thickening of the lining of the uterus:

  • A. Polar body
  • B. Ovum
  • C. Primary oocyte
  • D. Secondary oocyte

Explanation: The correct answer is Option D: Secondary oocyte. The release of the secondary oocyte occurs during ovulation, which is coordinated with…

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Correct answer: Secondary oocyte

15760. The_cycle in humans involves the preparation of the uterine wall to receive the embryo if fertilization occurs:

  • A. Menstrual
  • B. Ovarian
  • C. Uterine
  • D. Oestrous

Explanation: Based on the explanations provided, the correct answer to the question is option C) Uterine Cycle.

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Correct answer: Uterine
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