All Free Biology MCQs with Answers

• A. Prolactin
• B. LH
• C. FSH
• D. Oxytocin

Explanation: Luteinizing hormone (LH) is a hormone produced by the pituitary gland. In females, LH plays a crucial role in the menstrual cycle by…

• A. Menospause
• B. Menstruation
• C. Puberty
• D. All of the above

Explanation: Puberty is the period during which adolescents undergo physical and hormonal changes that lead to sexual maturity.

• A. Semen
• B. Sperm
• C. Ovum
• D. None of the above

Explanation: Sperm is the actual male reproductive cell, containing genetic material (DNA) and capable of fertilizing an egg.

• A. Penis
• B. Testis
• C. Ovary
• D. All

Explanation: The testes are the primary male reproductive organs responsible for producing sperm and testosterone, the primary male sex hormone.

• A. Male sex hormone
• B. Female sex hormone
• C. A chemical needed for menopause
• D. Type of vitamin

Explanation: Testosterone is primarily known as the male sex hormone, although it is present in both males and females.

• A. A deep voice
• B. Facial hair
• C. Both A and B
• D. None of the above

Explanation: During puberty, the larynx (voice box) grows larger and the vocal cords lengthen and thicken.

• A. Penis
• B. Testes
• C. Prostate gland
• D. Abdominal cavity

Explanation: Sperm is primarily produced in the testes, specifically within structures called the seminiferous tubules.

• A. Scrotum
• B. Epididymis
• C. Testicle
• D. Vas deferens

Explanation: The scrotum is the sac-like structure located outside the body, below the penis. Its primary function is to house and protect the testes.

• A. Testicle
• B. Ovary
• C. Gland
• D. Vas deferens

Explanation: The testicle, also known as the testis (plural: testes), refers to the male reproductive gland that produces sperm and testosterone.

• A. Secrete semen
• B. Store sperm temporarily
• C. Lubricate the sperm for more effective movement
• D. None of the above

Explanation: Sperm secretion is correct. One of the main functions of the epididymis is to store sperm temporarily.

• A. Sperm
• B. Semen
• C. Urine
• D. All

Explanation: Semen is the fluid that is ejaculated from the male reproductive tract.

• A. Leaving the testis
• B. Mutations
• C. Dehydration
• D. All

Explanation: Semen helps prevent dehydration of sperm by providing a nourishing medium that contains sugars and other nutrients to sustain the sperm…

• A. Urethra
• B. Sperm duct
• C. Vas deferens
• D. None of the above

Explanation: The urethra is the tube that carries urine from the urinary bladder to the outside of the body during urination.

• A. Epididymis
• B. Penis
• C. Vas deferens
• D. None of the above

Explanation: The sperm duct, also known as the vas deferens, is a duct in the male reproductive system that carries sperm from the epididymis to the…

• A. Pancreas
• B. Penile
• C. Prostate
• D. All

Explanation: The prostate gland, located beneath the bladder, surrounds the urethra.

• A. Spongy tissues inside it fills with blood
• B. There is a hinge joint between the pelvic bone and the penile bone
• C. It fills with urine or sperm
• D. None of the above

Explanation: Spongy tissues inside it fills with blood: This is the correct explanation.

• A. Leydig cells
• B. Seminiferous tubules
• C. Epididymis
• D. Vas deferens

Explanation: Leydig cells: This is the correct explanation. Leydig cells, also known as interstitial cells, are found in the testes and are responsible…

• A. Testes
• B. Ovaries
• C. Scrotal sacs
• D. Sperm duct

Explanation: The male gonads are called testes. They are responsible for producing sperm cells and testosterone, the primary male sex hormone.

• A. Ovum
• B. Blastocyst
• C. Diploid cell
• D. Zygote

Explanation: The zygote is the fertilized egg formed when a sperm cell fertilizes an egg cell.

• A. Puberty
• B. Menarche
• C. Menopause
• D. Old age

Explanation: Menupause is the physiological cessation of menstrual cycles and reproductive capability in females.