🧑‍🤝‍🧑 Reaching the Age of Adolescence – MCQs for Class 8 Science

Part 2: Q26–Q50

Q26. Which of the following is a secondary sexual character in girls?

A) Growth of beard
B) Development of breasts
C) Deepening of voice
D) Growth of moustache

✅ Correct Answer: B) Development of breasts

Explanation:

• A, C, D – Male characters.
• B) ✔ Breast development is a female secondary sexual character.

Q27. Which hormone is responsible for milk production after childbirth?

A) Estrogen
B) Progesterone
C) Prolactin
D) Testosterone

✅ Correct Answer: C) Prolactin

Explanation:

• A, B – Female reproductive hormones.
• C) ✔ Prolactin stimulates milk production in mothers.
• D) Male hormone.

Q28. Which gland secretes growth hormone?

A) Thyroid
B) Pituitary
C) Pancreas
D) Adrenal

✅ Correct Answer: B) Pituitary

Explanation:

• A, C, D – Other hormones.
• B) ✔ Pituitary produces growth hormone that regulates body height.

Q29. Which gland secretes insulin?

A) Pancreas
B) Thyroid
C) Pituitary
D) Adrenal

✅ Correct Answer: A) Pancreas

Explanation:

• A) ✔ Insulin from pancreas regulates blood sugar.
• B, C, D – Not insulin.

Q30. A sudden and uncontrollable release of emotions during adolescence is due to:

A) Growth in bones
B) Hormonal changes
C) Dietary habits
D) Lack of exercise

✅ Correct Answer: B) Hormonal changes

Explanation:

• A, C, D – May affect health, but not emotions.
• B) ✔ Hormonal fluctuations cause mood swings.

Q31. Which organ in the body is affected due to lack of insulin?

A) Brain
B) Heart
C) Blood and body cells
D) Bones

✅ Correct Answer: C) Blood and body cells

Explanation:

• A, B, D – Not directly.
• C) ✔ Without insulin, glucose cannot enter cells, causing diabetes.

Q32. Which gland secretes adrenaline?

A) Pituitary
B) Adrenal
C) Pancreas
D) Thyroid

✅ Correct Answer: B) Adrenal

Explanation:

• A, C, D – Other glands.
• B) ✔ Adrenal gland produces adrenaline (emergency hormone).

Q33. Which hormone is released by ovaries in females?

A) Testosterone
B) Estrogen
C) Adrenaline
D) Thyroxine

✅ Correct Answer: B) Estrogen

Explanation:

• A) Male hormone.
• B) ✔ Estrogen regulates female sexual development.
• C, D – Other roles.

Q34. Which is the male reproductive hormone?

A) Estrogen
B) Progesterone
C) Testosterone
D) Insulin

✅ Correct Answer: C) Testosterone

Explanation:

• A, B – Female hormones.
• C) ✔ Testosterone → male reproductive hormone.
• D) Blood sugar regulator.

Q35. The term “adolescence” is derived from a Latin word meaning:

A) To mature
B) To grow
C) To nourish
D) To complete

✅ Correct Answer: B) To grow

Explanation:

• A, C, D – Not exact meaning.
• B) ✔ Adolescence means “to grow” in Latin.

Q36. Which gland is situated in the neck region?

A) Pituitary
B) Thyroid
C) Pancreas
D) Adrenal

✅ Correct Answer: B) Thyroid

Explanation:

• A, C, D – Located elsewhere.
• B) ✔ Thyroid is located in the throat/neck region.

Q37. Which hormone triggers ovulation in females?

A) Follicle-stimulating hormone (FSH)
B) Luteinizing hormone (LH)
C) Estrogen
D) Insulin

✅ Correct Answer: B) Luteinizing hormone (LH)

Explanation:

• A) FSH develops follicles.
• B) ✔ LH causes ovulation.
• C) Estrogen regulates cycles.
• D) Not reproductive.

Q38. The changes which help to distinguish a boy from a girl are called:

A) Primary sexual characters
B) Secondary sexual characters
C) Tertiary sexual characters
D) Genetic characters

✅ Correct Answer: B) Secondary sexual characters

Explanation:

• A) Organs present since birth.
• B) ✔ Secondary traits develop at puberty.
• C, D – Not proper terms.

Q39. Which of these is NOT a secondary sexual character in boys?

A) Growth of beard
B) Deepening of voice
C) Menstruation
D) Development of muscles

✅ Correct Answer: C) Menstruation

Explanation:

• A, B, D – Male characters.
• C) ✔ Menstruation is in girls.

Q40. The hormone thyroxine is secreted in the presence of which mineral?

A) Calcium
B) Iron
C) Iodine
D) Phosphorus

✅ Correct Answer: C) Iodine

Explanation:

• A, B, D – Needed for other functions.
• C) ✔ Iodine is required for thyroxine production.

Q41. Which of these is NOT an endocrine gland?

A) Thyroid
B) Pituitary
C) Sweat gland
D) Pancreas

✅ Correct Answer: C) Sweat gland

Explanation:

• A, B, D – Endocrine glands.
• C) ✔ Sweat gland is exocrine, not endocrine.

Q42. The stopping of menstruation around age 45–50 is called:

A) Menarche
B) Puberty
C) Menopause
D) Ovulation

✅ Correct Answer: C) Menopause

Explanation:

• A) Start of menstruation.
• B) Adolescence phase.
• C) ✔ Menopause is end of menstrual cycles.
• D) Egg release.

Q43. Which vitamin helps in absorption of calcium in bones?

A) Vitamin A
B) Vitamin B
C) Vitamin D
D) Vitamin C

✅ Correct Answer: C) Vitamin D

Explanation:

• A, B, D – Other functions.
• C) ✔ Vitamin D helps calcium absorption for strong bones.

Q44. Which hormone regulates the menstrual cycle?

A) Progesterone
B) Testosterone
C) Adrenaline
D) Thyroxine

✅ Correct Answer: A) Progesterone

Explanation:

• A) ✔ Progesterone regulates menstruation and pregnancy.
• B, C, D – Not correct.

Q45. Which part of the brain controls the pituitary gland?

A) Cerebellum
B) Medulla
C) Hypothalamus
D) Cerebrum

✅ Correct Answer: C) Hypothalamus

Explanation:

• A, B, D – Not control centers.
• C) ✔ Hypothalamus controls pituitary secretion.

Q46. The emergency hormone is:

A) Insulin
B) Adrenaline
C) Progesterone
D) Estrogen

✅ Correct Answer: B) Adrenaline

Explanation:

• A, C, D – Not stress hormones.
• B) ✔ Adrenaline prepares body for “fight or flight.”

Q47. What is the full form of AIDS?

A) Advanced Immunity Deficiency Syndrome
B) Acquired Immune Deficiency Syndrome
C) Acute Immune Disorder Syndrome
D) Active Immunity Disease Syndrome

✅ Correct Answer: B) Acquired Immune Deficiency Syndrome

Explanation:

• B) ✔ Correct full form of AIDS.
• A, C, D – Incorrect expansions.

Q48. Which microorganism causes AIDS?

A) Bacteria
B) Virus
C) Protozoa
D) Fungi

✅ Correct Answer: B) Virus

Explanation:

• A, C, D – Cause other diseases.
• B) ✔ HIV (Human Immunodeficiency Virus) causes AIDS.

Q49. Which of these is a way to prevent AIDS?

A) Using clean needles
B) Sharing razors
C) Using unprotected injections
D) Blood transfusion without testing

✅ Correct Answer: A) Using clean needles

Explanation:

• B, C, D – Spread HIV.
• A) ✔ Prevention includes using clean needles and tested blood.

Q50. Which is the male gamete?

A) Ovum
B) Embryo
C) Sperm
D) Zygote

✅ Correct Answer: C) Sperm

Explanation:

• A) Female gamete.
• B, D – Products after fertilization.
• C) ✔ Sperm is male gamete.

Reaching the Age Adolescence Class 8 MCQs, CBSE Class 8 Science MCQs, NCERT Class 8 Adolescence MCQs, Online Learning Science MCQs, Important MCQs Class 8, cbse class 8 science reaching the age of adolescence mcqs with answers, ncert class 8 reaching the age of adolescence objective questions, important mcqs for class 8 adolescence board exams, online learning mcqs for class 8 science adolescence, chapter wise mcqs for class 8 science reaching the age of adolescence