All Free Biology MCQs with Answers

• A. Seminal vesicle
• B. Cowper's gland
• C. Prostate gland
• D. Bartholin's gland

Explanation: Fluids contributed by the seminal vesicles are approximately 60 percent of the total semen volume; these fluids contain fructose, amino…

• A. Urethra
• B. Spermatic duct
• C. Oviduct
• D. Ejaculatory duct

Explanation: The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens.

• A. Seminal vesicle
• B. Prostate gland
• C. Cowper's gland
• D. Lacrimal gland

Explanation: In humans, the male reproductive system consists of the following organs:2 testes in the scrotum, 2 epididymides, 2 deferent ducts (vas…

• A. Zona pellucida, corona radiata, plasma membrane
• B. Corona radiata, zona pellucida, plasma membrane
• C. Plasma membrane, zona pellucida, corona radiata
• D. None of the above

Explanation: The correct sequence of layers in the mammalian egg from the outside to the inside is:b) Corona Radiata, Zona Pellucida, Plasma…

• A. Estrogen
• B. Testosterone
• C. Progesterone
• D. All of these

Explanation: The correct answer is a) Estrogen. While estrogen is active during the proliferative phase, neither testosterone nor progesterone is…

• A. Follicular phase
• B. Menstrual phase
• C. Secretory phase
• D. Proliferative phase

Explanation: The secretory phase occurs after ovulation and is also known as the luteal phase.

• A. Menarche
• B. Impotency
• C. Menopause
• D. Puberty

Explanation: Menopause is the correct term for the cessation of the menstrual cycle.

• A. Meiosis II
• B. Division of secondary oocyte and secondary spermatocyte
• C. Formation of first polar body
• D. Formation of second polar body

Explanation: The correct answer is:c) Formation of the first polar bodyDuring oogenesis (the process of egg cell development), the primary oocyte…

• A. Interphase
• B. Anaphase II
• C. Prophase I
• D. Both prophase I and II

Explanation: The correct answer is:c) Prophase IProphase I is the first phase of meiosis and is characterized by the pairing of homologous chromosomes…

• A. Ovum
• B. Primary oocyte
• C. Oogonium
• D. Secondary oocyte

Explanation: The correct answer is:d) Secondary oocyteThe secondary oocyte is the immediate product of the first meiotic division (Meiosis I) of a…

• A. ADCEB
• B. ACEDB
• C. BACDE
• D. CADBE

Explanation: The sequence of events in the human female reproductive cycle and match them with the provided options:A-Secretion of…

• A. Sperms are non-nucleate
• B. Semen is without sperms
• C. Spermatogenesis does not occur
• D. Sperms are nonmotile

Explanation: The correct answer is:b) Semen is without spermsThe vas deferens are responsible for transporting sperm from the epididymis to the…

• A. 6,1,2,7,5,3,4
• B. 1,6,2,7,5,4,3
• C. 1,6,2,7,5,3,4
• D. 1,2,6,7,5,3,4

Explanation: The pathway of sperm is seminiferous tubules-epididymis-vas deferens- urethra-vagina-fallopian tubes-uterus.

• A. 12
• B. 46
• C. 23
• D. 92

Explanation: The most accurate option is:b) 46Spermatogonia are the diploid precursor cells of sperm cells.

• A. Testosterone
• B. Corticosterone
• C. Oestrogen
• D. Progesterone

Explanation: The correct answer is:a) TestosteroneLeydig cells are specialized cells found in the testes of males.

• A. Vagina
• B. Embryo sac
• C. Testes
• D. Ovary

Explanation: The correct answer is d) Ovary. Human eggs, also known as ova or oocytes, are produced within the ovaries.

• A. Seminal fluid
• B. Testosterone
• C. Sperm
• D. Urine

Explanation: The correct answer is a) Seminal fluid. The prostate gland is a major contributor to the production of seminal fluid, which is a milky…

• A. Luteinizing hormone
• B. Progesterone
• C. Follicle-stimulating hormone
• D. Testosterone

Explanation: The corpus luteum secretes estrogens and progesterone. The latter hormone causes changes in the uterus that make it more suitable for…

• A. 14th day
• B. 5th day
• C. 20th day
• D. 11th day

Explanation: The correct answer is a) 14th day. In a normal human menstrual cycle, the rapid secretion of LH (luteinizing hormone) surge usually occurs…

• A. Spermiogenesis
• B. Metamorphosis
• C. Spermatogenesis
• D. Gametogenesis

Explanation: The correct answer is a) Spermiogenesis. Spermiogenesis is the process by which round, non-motile spermatids (immature male germ cells)…