Check the below Online Education NCERT MCQ Questions for Class 8 Science Chapter 10 Reaching the Age of Adolescence with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. We have provided Reaching the Age of Adolescence Class 8 Science MCQs Questions with Answers to help students understand the concept very well. https://ncertmcq.com/mcq-questions-for-class-8-science-with-answers/
You can refer to NCERT Solutions for Class 8 Science Chapter 10 Reaching the Age of Adolescence to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Reaching the Age of Adolescence Class 8 MCQs Questions with Answers
Choose the correct option in the following questions:
Reaching The Age Of Adolescence Class 8 MCQ Question 1.
Adolescence is the period of
(a) 5 to 10 years
(b) 11 to 19 years
(c) 22 to 28 years
(d) 30 to 40 years
Answer
Answer: (b) 11 to 19 years
Class 8 Science Chapter 10 MCQ Question 2.
When a sperm having X-chromosome fuses with the ovum, the child born will be
(a) male
(b) female
(c) male as well as female twin
(d) it depends on the chance of fusion
Answer
Answer: (b) female
Class 8 Science Ch 10 MCQ Question 3.
How many pairs of Chromosomes are found in nuclei of their cells?
(a) 22 pairs
(b) 23 pairs
(c) 24 pairs
(d) 25 pairs
Answer
Answer: (b) 23 pairs
MCQ Questions For Class 8 Science Chapter 10 Question 4.
Children gain height during
(a) adolescence
(b) endocrine
(c) balanced food
(d) menarche
Answer
Answer: (a) adolescence
Ch 10 Science Class 8 MCQ Question 5.
Testes secrete
(a) thyroxin
(b) estrogen
(c) testosterone
(d) iodine
Answer
Answer: (c) testosterone
Class 8 Chapter 10 Science MCQ Question 6.
Adam’s apple is
(a) enlarged larynx
(b) mammary glands
(c) apple of adam
(d) red apple
Answer
Answer: (a) enlarged larynx
Ncert Class 8 Science Chapter 10 MCQ Question 7.
The chemical substances which are secreted from endocrine glands are called
(a) puberty
(b) hormones
(c) estrogen
(d) adolescence
Answer
Answer: (b) hormones
Class 8 Ch 10 Science MCQ Question 8.
Out of these which one determines the sex of the baby?
(a) Hormones
(b) Chloroplast
(c) Chromosomes
(d) Pituitary gland
Answer
Answer: (c) Chromosomes
Chapter 10 Science Class 8 MCQ Question 9.
What is the stoppage of menstruation called?
(a) Menarche
(b) Menopause
(c) Gametes
(d) Insulin
Answer
Answer: (b) Menopause
Adolescence Class 8 MCQ Question 10.
Which hormone is secreted by adrenal glands?
(a) Adrenalin
(b) Insulin
(c) Testosterone
(d) Estrogen
Answer
Answer: (a) Adrenalin
Science Class 8 Chapter 10 MCQ Question 11.
Reproduction age in women starts when their
(a) menstruation starts
(b) breasts start developing
(c) body weight increases
(d) height increases
Answer
Answer: (a) menstruation starts
Class 8 Reaching The Age Of Adolescence MCQ Question 12.
Which is male gonads?
(a) Hair
(b) Chest
(c) Moustache
(d) Testis
Answer
Answer: (d) Testis
Chapter 10 Class 8 Science MCQ Question 13.
The beginning of menstruation at puberty is called
(a) ovulation
(b) menstruation
(c) menarche
(d) menopause
Answer
Answer: (c) menarche
Class 8 Science Ch 10 MCQ Questions Question 14.
In males, the sex chromosome consists
(a) one X and one Y
(b) both X and X
(c) both Y and Y
(d) one M and one X
Answer
Answer: (a) one X and one Y
Ch 10 Class 8 Science MCQ Question 15.
Production of thyroxin requires
(a) sodium
(b) magnesium
(c) iodine
(d) bromine
Answer
Answer: (c) iodine
Question 16.
The period of life, when the body undergoes changes, leading to reproductive maturity, is called
(a) childhood
(b) adolescence
(c) Grown up
(d) Old age
Answer
Answer: (b) adolescence
Question 17
The human body undergoes several changes during adolescence. These changes mark the onset of
(a) Puberty
(b) Prematurity
(c) Post adolescence
(d) ageing
Answer
Answer: (a) Puberty
Question 18.
Adam’s apple is prominent in
(a) Boys of any age
(b) Adolescent girls
(c) Girls of any age
(d) Adolescent boys
Answer
Answer: (d) Adolescent boys
Question 19.
Larynx is also called
(a) Voice box
(b) Sound box
(c) Black box
(d) All of the above
Answer
Answer: (a) Voice box
Question 20.
Acne and pimples on the face is due to secretion of
(a) bile from liver
(b) Oil glands during puberty
(c) Enzymes in the digestive tract
(d) Tear from tear glands
Answer
Answer: (b) Oil glands during puberty
Question 21.
Testosterone is a hormone found in human ___
(a) Children
(b) males and females
(c) Females only
(d) Males only
Answer
Answer: (d) Males only
Question 22.
The first menstrual flow is called
(a) Menstruation
(b) Mensuration
(c) Menarche
(d) Menopause
Answer
Answer: (c) Menarche
Question 23.
Menopause occurs at the age of
(a) 10-12 years in boys
(b) 45-50 years in men
(c) 10-12 years in girls
(d) 45-50 years in women
Answer
Answer: (d) 45-50 years in women
Question 24.
When a sperm containing Y chromosome fertilizes an egg with X chromosome, the zygote develops into a _____ child
(a) Female
(b) Either a male or female
(c) Male
(d) No child
Answer
Answer: (c) Male
Question 25.
The change from larvae to adult is called
(a) Metabolism
(b) Metamorphosis
(c) Metastasis
(d) Morphology
Answer
Answer: (b) Metamorphosis
Match the following items given in Column ‘A with that in Column B’:
| Column A | Column B |
| (i) Pituitary gland | (a) Thyroxine |
| (ii) Thyroid gland | (b) Adrenalin |
| (iii) Adrenal gland | (c) Insulin |
| (iv) Pancreas | (d) Master gland |
| (v) XX chromosomes | (e) Boy |
| (vi) XY chromosomes | (f) Girl |
Answer
Answer:
| Column A | Column B |
| (i) Pituitary gland | (d) Master gland |
| (ii) Thyroid gland | (a) Thyroxine |
| (iii) Adrenal gland | (b) Adrenalin |
| (iv) Pancreas | (c) Insulin |
| (v) XX chromosomes | (f) Girl |
| (vi) XY chromosomes | (e) Boy |
Fill in the blanks with the appropriate words:
1. Children gain height during …………..
Answer
Answer: adolescence
2. The onset of ………….. and ………….. of reproductive parts are controlled by hormones.
Answer
Answer: puberty, maturity
3. Hormones are secretions of ………….. glands.
Answer
Answer: endocrine
4. Pancreas secretes ………….., thyroid produces ………….. and adrenals produce …………..
Answer
Answer: insulin, thyroxine, adrenalin
5. Testosterone is the ………….. hormone.
Answer
Answer: male
6. ………….. of the unborn child depends on whether the zygote has XX or XY chromosomes.
Answer
Answer: Sex
7. It is important to eat ………….. and maintain personal hygiene during adolescence.
Answer
Answer: balanced food.
State whether the statements given below are True or False:
1. Hormones are secreted from endocrine gland.
Answer
Answer: True
2. Adolescence period cover 30-35 years of age.
Answer
Answer: False
3. 23 pair of chlorosomes are found in nuclei of the cells.
Answer
Answer: True
4. Testes are responsible for production of sperms.
Answer
Answer: True
5. Stoppage of menstruation is called adolescence.
Answer
Answer: False
6. Mother is responsible for the sex determination of the baby.
Answer
Answer: False
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