All Free Biology MCQs with Answers

• A. Cervix
• B. Upper part of the uterus
• C. Fallopian tube
• D. Lower part of the uterus

Explanation: In human beings, fertilization -the process where a sperm fuses with an ovum (egg) normally takes place in the fallopian tube…

• A. Spermatozoa
• B. Primary oocyte
• C. Secondary spermatocyte
• D. Mature sperms

Explanation: Primary spermatocytes undergo the first meiotic division to produce secondary spermatocytes.

• A. Fluid secreted by Sertoli cells
• B. Fluid in scrotum
• C. Interstitial fluid
• D. All of the above

Explanation: Sertoli cells are specialized cells found inside the seminiferous tubules of the testes.They play a vital role in protecting and…

• A. Flagella
• B. Pilli
• C. Cilia
• D. All of these

Explanation: Sperm move through the female reproductive tract using a whip-like tail called a flagellum.

• A. To produce enzymes
• B. To produce sperms
• C. To transfer sperm to the female
• D. Both B and C are correct

Explanation: The testes, specifically the seminiferous tubules, are responsible for spermatogenesis, the process of sperm production.

• A. Ureter
• B. Urethra
• C. Testes
• D. All of these

Explanation: The sperm duct, also known as the vas deferens, opens into the urethra.

• A. 10
• B. 20
• C. 30
• D. 300

Explanation: In a healthy human male, approximately 100 to 300 million sperm are produced each day.This high production rate occurs in the seminiferous…

• A. Animal pole
• B. Vegetal pole
• C. Both A and B
• D. None of these

Explanation: In fertilization, the sperm typically enters the ovum at the animal pole.

• A. 1-5
• B. 5-13
• C. 15-28
• D. 16-18

Explanation: Explanation for this question will be added soon.

• A. Uterine and fetal tissues
• B. Uterine and cervix
• C. Cervix and vagina
• D. Ovary and oviduct

Explanation: Explanation for this question will be added soon.

• A. Shedding to uterus
• B. Thickening of the uterus wall
• C. Development of follicle
• D. Implantation

Explanation: During the 16-28 day period, if fertilization has occurred, the uterus prepares for potential implantation by thickening its lining.

• A. Voice deepens
• B. Pubic hair growth
• C. Hips broaden
• D. Start of menstrual cycle

Explanation: At puberty, females experience several physical and hormonal changes due to increased levels of estrogen and other hormones.

• A. Placenta disintegration
• B. Distension of cervix
• C. Secretion of oxytocin
• D. Estrogen production

Explanation: Oxytocin is a hormone that plays a crucial role in inducing labor. It is released in response to various stimuli, such as cervical…

• A. Menopause
• B. Menarche
• C. Huge hips
• D. Hairs

Explanation: Menopause is the cessation of menstrual cycles and reproductive capacity, typically occurring in middle-aged or older women.

• A. In vitro fertilization
• B. In vivo fertilization
• C. Both A and B
• D. Ex vitro fertilization

Explanation: "In vitro" means "in glass" in Latin. In vitro fertilization (IVF) is a process where fertilization occurs outside the body in a…

• A. Prolactin (LTH)
• B. Human Placental Lactogen (hPL)
• C. Placenta
• D. All of these

Explanation: The correct answer is Prolactin (LTH). Prolactin is the hormone primarily responsible for stimulating milk production in the mammary…

• A. Late 50s
• B. Mid 40s
• C. Teens
• D. Early 20s

Explanation: Menopause is a point in time 12 months after a woman's last period.The menopausal transition most often begins between ages 45 and…

• A. Anaphase I
• B. Prophase I
• C. Metaphase I
• D. Metaphase ll

Explanation: When a female ovulates, the secondary oocyte (not the primary oocyte) is released from the ovary.

• A. In uterus
• B. In ovary
• C. In distal part of oviduct
• D. In proximal part of oviduct

Explanation: Fertilization occurs in the distal part of the oviduct (ampulla) because it is closest to the ovary and provides the ideal environment for…

• A. From puberty
• B. At menarche
• C. At the adult stage
• D. Before birth

Explanation: Oogenesis begins during fetal development, before birth. In females, primordial germ cells develop into oogonia, which eventually give…