Extra 40 MCQs with answers from the chapter:7 "Reaching the Age of Adolescence" for Class 8 Science CBSE:-
1. Adolescence begins at the age of:
a) 5-8 years
b) 10-19 years
c) 20-25 years
d) 30-35 years
Ans: (b) 10-19 years
2. Which hormone is responsible for the development of secondary sexual characteristics in boys?
a) Estrogen
b) Progesterone
c) Testosterone
d) Insulin
Ans: (c) Testosterone
3. The period of transition from childhood to adulthood is called:
a) Puberty
b) Menstruation
c) Fertilization
d) Adolescence
Ans: (d) Adolescence
4. The onset of menstruation in girls is called:
a) Menopause
b) Menarche
c) Ovulation
d) Fertilization
Ans: (b) Menarche
5. Which gland is called the "master gland" of the body?
a) Thyroid
b) Adrenal
c) Pituitary
d) Pancreas
Ans: (c) Pituitary
6. The voice box in boys grows during puberty. It is also called:
a) Pharynx
b) Larynx
c) Epiglottis
d) Trachea
Ans: (b) Larynx
7. The female hormone responsible for the development of secondary sexual characters is:
a) Testosterone
b) Adrenaline
c) Oestrogen
d) Thyroxine
Ans: (c) Oestrogen
8. Which of the following glands is responsible for regulating metabolism?
a) Pituitary
b) Thyroid
c) Adrenal
d) Pancreas
Ans: (b) Thyroid
9. The hormone responsible for controlling sugar levels in the blood is:
a) Insulin
b) Testosterone
c) Oestrogen
d) Thyroxine
Ans: (a) Insulin
10. The secretion of hormones is controlled by which system in the body?
a) Respiratory system
b) Nervous system
c) Endocrine system
d) Circulatory system
Ans: (c) Endocrine system
11. What is the role of the pituitary gland?
a) Regulates growth and development
b) Controls sugar level
c) Produces digestive enzymes
d) Maintains water balance
Ans: (a) Regulates growth and development
12. The male gamete is called:
a) Ovum
b) Sperm
c) Zygote
d) Embryo
Ans: (b) Sperm
13. The age at which girls typically reach puberty is:
a) 10-12 years
b) 6-8 years
c) 16-18 years
d) 20-25 years
Ans: (a) 10-12 years
14. The chemical substances secreted by endocrine glands are called:
a) Enzymes
b) Hormones
c) Proteins
d) Vitamins
Ans: (b) Hormones
15. The gland that controls calcium levels in the blood is:
a) Adrenal
b) Pituitary
c) Parathyroid
d) Thyroid
Ans: (c) Parathyroid
16. Which of the following is an example of a secondary sexual characteristic?
a) Growth of beard in boys
b) Formation of zygote
c) Digestion of food
d) Oxygen transport in blood
Ans: (a) Growth of beard in boys
17. The stopping of the menstrual cycle in women is called:
a) Menarche
b) Menopause
c) Ovulation
d) Fertilization
Ans: (b) Menopause
18. The endocrine gland responsible for emergency reactions is:
a) Thyroid
b) Pituitary
c) Adrenal
d) Pancreas
Ans: (c) Adrenal
19. The phase of rapid growth in boys and girls is called:
a) Childhood
b) Adolescence
c) Old age
d) Infancy
Ans: (b) Adolescence
20. The menstrual cycle in human females is typically:
a) 7 days
b) 15 days
c) 28 days
d) 60 days
Ans: (c) 28 days
21. The voice of boys becomes deeper during puberty due to the growth of:
a) Lungs
b) Vocal cords
c) Mouth
d) Heart
Ans: (b) Vocal cords
22. Which organ produces eggs in females?
a) Testes
b) Ovary
c) Uterus
d) Pituitary
Ans: (b) Ovary
23. What is the function of the pancreas?
a) Produces insulin
b) Controls growth
c) Helps in digestion
d) All of the above
Ans: (d) All of the above
24. The onset of puberty is triggered by the secretion of:
a) Adrenaline
b) Growth hormone
c) Sex hormones
d) Insulin
Ans: (c) Sex hormones
25. The structure in the female reproductive system where the fetus develops is called:
a) Ovary
b) Uterus
c) Fallopian tube
d) Vagina
Ans: (b) Uterus
26. The hormone secreted by the thyroid gland is:
a) Testosterone
b) Insulin
c) Thyroxine
d) Adrenaline
Ans: (c) Thyroxine
27. The first sign of puberty in boys is:
a) Growth of body hair
b) Change in voice
c) Increase in height
d) All of the above
Ans: (d) All of the above
28. Which of the following is an oviparous animal?
a) Cow
b) Dog
c) Hen
d) Elephant
Ans: (c) Hen
29. The menstrual cycle prepares the body for:
a) Fertilization
b) Growth
c) Digestion
d) None of these
Ans: (a) Fertilization
30. The onset of puberty is controlled by which gland?
a) Pituitary
b) Pancreas
c) Adrenal
d) Salivary
Ans: (a) Pituitary
31. The female gamete is called:
a) Ovum
b) Sperm
c) Zygote
d) Embryo
Ans: (a) Ovum
32. The longest bone in the human body is found in the:
a) Hand
b) Leg
c) Arm
d) Spine
Ans: (b) Leg
33. Growth during adolescence is controlled by:
a) Insulin
b) Growth hormone
c) Oestrogen
d) Thyroxine
Ans: (b) Growth hormone
34. Adolescence is characterized by:
a) Rapid growth
b) Physical and emotional changes
c) Maturation of reproductive organs
d) All of the above
Ans: (d) All of the above
35. The gland that controls the release of sex hormones is:
a) Pancreas
b) Pituitary gland
c) Adrenal gland
d) Salivary gland
Ans: (b) Pituitary gland
36. The hormone responsible for controlling body weight and metabolism is:
a) Adrenaline
b) Thyroxine
c) Insulin
d) Testosterone
Ans: (b) Thyroxine
37. Which hormone is responsible for milk production in mothers after childbirth?
a) Progesterone
b) Prolactin
c) Oestrogen
d) Testosterone
Ans: (b) Prolactin
38. Which of the following is NOT a secondary sexual characteristic in males?
a) Growth of facial hair
b) Deepening of voice
c) Widening of hips
d) Development of muscles
Ans: (c) Widening of hips
39. Which of the following is a male reproductive organ?
a) Ovaries
b) Uterus
c) Testes
d) Fallopian tubes
Ans: (c) Testes
40. Which of these statements is TRUE about adolescence?
a) It is the period from birth to childhood.
b) It involves physical, mental, and emotional changes.
c) It occurs only in girls.
d) It has no effect on the body.
Ans: (b) It involves physical, mental, and emotional changes.
