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GRADE 12 LIFE SCIENCES - HUMAN REPRODUCTION 2026
QUESTIONS LATEST 2026 – 2027 VERSION SOLVED
QUESTIONS & ANSWERS
Grade 12 Life Sciences - Human Reproduction
250 Multiple Choice Questions with Rationales
SECTION 1: MALE REPRODUCTIVE SYSTEM (Questions 1-30)
1. Which of the following structures in the male reproductive system is responsible
for the production of sperm cells through the process of spermatogenesis?
• A) Epididymis
• B) Seminal vesicles
• C) Seminiferous tubules of the testes
• D) Prostate gland
Answer: C - The seminiferous tubules, located within the testes, are the specific sites
where spermatogenesis (sperm production) occurs. The epididymis (A) stores and
matures sperm, the seminal vesicles (B) and prostate gland (D) produce seminal fluid
components, but they do not produce sperm cells.
2. The male reproductive system is responsible for producing gametes and
hormones. Which hormone is primarily produced by the interstitial cells (Leydig
cells) in the testes?
• A) Follicle-stimulating hormone (FSH)
• B) Luteinizing hormone (LH)
• C) Testosterone
• D) Gonadotropin-releasing hormone (GnRH)
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Answer: C - Testosterone is the primary male sex hormone, produced by the interstitial
cells (Leydig cells) located between the seminiferous tubules. FSH (A) and LH (B) are
produced by the anterior pituitary gland, and GnRH (D) is produced by the
hypothalamus.
3. A 45-year-old male patient presents with decreased libido, fatigue, and reduced
muscle mass. Blood tests reveal low testosterone levels and elevated FSH and LH
levels. This hormonal pattern is most consistent with which condition?
• A) Primary testicular failure
• B) Secondary hypogonadism due to pituitary dysfunction
• C) Hypothalamic dysfunction
• D) Prostate cancer
Answer: A - Primary testicular failure is characterized by low testosterone production by
the testes, leading to reduced negative feedback on the pituitary. This results in
elevated FSH and LH levels as the pituitary attempts to stimulate the non-responsive
testes. Secondary hypogonadism (B) involves low pituitary hormones, and
hypothalamic dysfunction (C) involves low GnRH.
4. Sperm cells are transported from the epididymis through which structure before
reaching the ejaculatory duct?
• A) Vas deferens
• B) Urethra
• C) Seminiferous tubules
• D) Prostate gland
Answer: A - The vas deferens (ductus deferens) transports sperm from the epididymis
to the ejaculatory duct. The urethra (B) transports both urine and semen out of the body
but is after the ejaculatory duct. Sperm are produced in the seminiferous tubules (C),
and the prostate gland (D) adds fluid to semen.
5. Which structure in the male reproductive system secretes an alkaline fluid that
neutralizes the acidic environment of the vagina and provides nutrients for sperm?
• A) Epididymis
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• B) Seminal vesicles
• C) Prostate gland
• D) Bulbourethral glands
Answer: B - The seminal vesicles produce a thick, yellowish, alkaline fluid rich in
fructose (for sperm energy) and prostaglandins, which helps neutralize vaginal acidity.
The prostate gland (C) also produces an alkaline fluid but is more watery, and
bulbourethral glands (D) produce a pre-ejaculatory lubricating fluid.
6. During spermatogenesis, a primary spermatocyte undergoes meiosis to produce
how many functional sperm cells?
• A) One
• B) Two
• C) Three
• D) Four
Answer: D - Each primary spermatocyte undergoes meiosis (two divisions) to produce
four haploid spermatids, which then differentiate into four functional sperm cells. This
contrasts with oogenesis (female), where only one functional ovum is produced from a
primary oocyte.
7. The prostate gland is located in the male reproductive system. Which of the
following is a common age-related condition associated with enlargement of the
prostate gland?
• A) Testicular torsion
• B) Benign prostatic hyperplasia (BPH)
• C) Epididymitis
• D) Varicocele
Answer: B - Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the
prostate gland that commonly occurs in aging men, often causing urinary symptoms.
Testicular torsion (A) is a twisting of the testicle, epididymitis (C) is inflammation of the
epididymis, and varicocele (D) is enlarged veins in the scrotum.
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8. The male reproductive system includes accessory glands that contribute to
seminal fluid. Which structure is responsible for producing a fluid that provides
lubrication during sexual intercourse?
• A) Seminal vesicles
• B) Prostate gland
• C) Bulbourethral glands (Cowper's glands)
• D) Epididymis
Answer: C - The bulbourethral glands (Cowper's glands) secrete a clear, mucus-like
fluid that lubricates the urethra and neutralizes acidic urine residue before ejaculation.
The seminal vesicles (A) and prostate gland (B) contribute to seminal fluid volume and
nutrients, while the epididymis (D) stores and matures sperm.
9. Sperm cells have a specialized structure adapted for their function. What is the
primary function of the acrosome found at the tip of the sperm head?
• A) To provide energy for movement
• B) To carry genetic material
• C) To release enzymes that help penetrate the egg
• D) To propel the sperm forward
Answer: C - The acrosome is a cap-like structure at the head of the sperm that contains
hydrolytic enzymes (e.g., hyaluronidase, acrosin) that are released to digest the zona
pellucida and facilitate penetration of the egg's outer layers. The midpiece contains
mitochondria for energy (A), the head carries genetic material (B), and the tail
(flagellum) provides propulsion (D).
10. Which hormone is responsible for stimulating sperm production
(spermatogenesis) in the seminiferous tubules?
• A) Luteinizing hormone (LH)
• B) Testosterone
• C) Follicle-stimulating hormone (FSH)
• D) Gonadotropin-releasing hormone (GnRH)
Answer: C - Follicle-stimulating hormone (FSH) acts directly on the Sertoli cells in the
seminiferous tubules to stimulate spermatogenesis. LH (A) stimulates testosterone
GRADE 12 LIFE SCIENCES - HUMAN REPRODUCTION 2026
QUESTIONS LATEST 2026 – 2027 VERSION SOLVED
QUESTIONS & ANSWERS
Grade 12 Life Sciences - Human Reproduction
250 Multiple Choice Questions with Rationales
SECTION 1: MALE REPRODUCTIVE SYSTEM (Questions 1-30)
1. Which of the following structures in the male reproductive system is responsible
for the production of sperm cells through the process of spermatogenesis?
• A) Epididymis
• B) Seminal vesicles
• C) Seminiferous tubules of the testes
• D) Prostate gland
Answer: C - The seminiferous tubules, located within the testes, are the specific sites
where spermatogenesis (sperm production) occurs. The epididymis (A) stores and
matures sperm, the seminal vesicles (B) and prostate gland (D) produce seminal fluid
components, but they do not produce sperm cells.
2. The male reproductive system is responsible for producing gametes and
hormones. Which hormone is primarily produced by the interstitial cells (Leydig
cells) in the testes?
• A) Follicle-stimulating hormone (FSH)
• B) Luteinizing hormone (LH)
• C) Testosterone
• D) Gonadotropin-releasing hormone (GnRH)
, Page 2 of 82
Answer: C - Testosterone is the primary male sex hormone, produced by the interstitial
cells (Leydig cells) located between the seminiferous tubules. FSH (A) and LH (B) are
produced by the anterior pituitary gland, and GnRH (D) is produced by the
hypothalamus.
3. A 45-year-old male patient presents with decreased libido, fatigue, and reduced
muscle mass. Blood tests reveal low testosterone levels and elevated FSH and LH
levels. This hormonal pattern is most consistent with which condition?
• A) Primary testicular failure
• B) Secondary hypogonadism due to pituitary dysfunction
• C) Hypothalamic dysfunction
• D) Prostate cancer
Answer: A - Primary testicular failure is characterized by low testosterone production by
the testes, leading to reduced negative feedback on the pituitary. This results in
elevated FSH and LH levels as the pituitary attempts to stimulate the non-responsive
testes. Secondary hypogonadism (B) involves low pituitary hormones, and
hypothalamic dysfunction (C) involves low GnRH.
4. Sperm cells are transported from the epididymis through which structure before
reaching the ejaculatory duct?
• A) Vas deferens
• B) Urethra
• C) Seminiferous tubules
• D) Prostate gland
Answer: A - The vas deferens (ductus deferens) transports sperm from the epididymis
to the ejaculatory duct. The urethra (B) transports both urine and semen out of the body
but is after the ejaculatory duct. Sperm are produced in the seminiferous tubules (C),
and the prostate gland (D) adds fluid to semen.
5. Which structure in the male reproductive system secretes an alkaline fluid that
neutralizes the acidic environment of the vagina and provides nutrients for sperm?
• A) Epididymis
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• B) Seminal vesicles
• C) Prostate gland
• D) Bulbourethral glands
Answer: B - The seminal vesicles produce a thick, yellowish, alkaline fluid rich in
fructose (for sperm energy) and prostaglandins, which helps neutralize vaginal acidity.
The prostate gland (C) also produces an alkaline fluid but is more watery, and
bulbourethral glands (D) produce a pre-ejaculatory lubricating fluid.
6. During spermatogenesis, a primary spermatocyte undergoes meiosis to produce
how many functional sperm cells?
• A) One
• B) Two
• C) Three
• D) Four
Answer: D - Each primary spermatocyte undergoes meiosis (two divisions) to produce
four haploid spermatids, which then differentiate into four functional sperm cells. This
contrasts with oogenesis (female), where only one functional ovum is produced from a
primary oocyte.
7. The prostate gland is located in the male reproductive system. Which of the
following is a common age-related condition associated with enlargement of the
prostate gland?
• A) Testicular torsion
• B) Benign prostatic hyperplasia (BPH)
• C) Epididymitis
• D) Varicocele
Answer: B - Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the
prostate gland that commonly occurs in aging men, often causing urinary symptoms.
Testicular torsion (A) is a twisting of the testicle, epididymitis (C) is inflammation of the
epididymis, and varicocele (D) is enlarged veins in the scrotum.
, Page 4 of 82
8. The male reproductive system includes accessory glands that contribute to
seminal fluid. Which structure is responsible for producing a fluid that provides
lubrication during sexual intercourse?
• A) Seminal vesicles
• B) Prostate gland
• C) Bulbourethral glands (Cowper's glands)
• D) Epididymis
Answer: C - The bulbourethral glands (Cowper's glands) secrete a clear, mucus-like
fluid that lubricates the urethra and neutralizes acidic urine residue before ejaculation.
The seminal vesicles (A) and prostate gland (B) contribute to seminal fluid volume and
nutrients, while the epididymis (D) stores and matures sperm.
9. Sperm cells have a specialized structure adapted for their function. What is the
primary function of the acrosome found at the tip of the sperm head?
• A) To provide energy for movement
• B) To carry genetic material
• C) To release enzymes that help penetrate the egg
• D) To propel the sperm forward
Answer: C - The acrosome is a cap-like structure at the head of the sperm that contains
hydrolytic enzymes (e.g., hyaluronidase, acrosin) that are released to digest the zona
pellucida and facilitate penetration of the egg's outer layers. The midpiece contains
mitochondria for energy (A), the head carries genetic material (B), and the tail
(flagellum) provides propulsion (D).
10. Which hormone is responsible for stimulating sperm production
(spermatogenesis) in the seminiferous tubules?
• A) Luteinizing hormone (LH)
• B) Testosterone
• C) Follicle-stimulating hormone (FSH)
• D) Gonadotropin-releasing hormone (GnRH)
Answer: C - Follicle-stimulating hormone (FSH) acts directly on the Sertoli cells in the
seminiferous tubules to stimulate spermatogenesis. LH (A) stimulates testosterone
