Reaching the Age of Adolescence Class 8 MCQs Questions with Answers
I. Choose the correct option.
Question 1.
The adolescence period is
(a) 14 – 20 years
(b) 10 – 18 years
(c) 11 – 19 years
(d) none of these
Answer
Answer: (c) 11 – 19 years
Question 2.
Larynx is called
(a) music box
(b) voice box
(c) respiratory organ
(d) sound box
Answer
Answer: (b) voice box
Question 3.
Most adolescents attain their maximum height around the age of
(a) 22 – 25years
(b) 13 – 15 years
(c) 11 – 12years
(d) 18 – 19 years
Answer
Answer: (d) 18 – 19 years
Question 4.
Initially girls grow
(a) slower than boys
(b) faster than boys
(c) both of these
(d) none of these
Answer
Answer: (b) faster than boys
Question 5.
Puberty age in females is
(a) 10 – 12 years
(b) 12 – 14 years
(c) 8 – 10 years
(d) 5 – 6 years
Answer
Answer: (a) 10 – 12 years
Question 6.
Puberty age in males is
(a) 12 – 14years
(b) 13 – 15years
(c) 10 – 12years
(d) 18 – 20 years
Answer
Answer: (a) 12 – 14years
Question 7.
Thyroxine hormone is produced by
(a) adrenal gland
(b) testes
(c) pituitary gland
(d) thyroid gland
Answer
Answer: (d) thyroid gland
Question 8.
The male hormone is called
(a) estrogen
(b) testosterone
(c) thyroxine
(d) insulin
Answer
Answer: (b) testosterone
Question 9.
The female hormone is called
(a) estrogen
(b) testosterone
(c) adrenaline
(d) none of these
Answer
Answer: (a) estrogen
Question 10.
Menstruation occurs once in about
(a) 28 to 30 days
(b) 25 to 30 days
(c) 45 to 50 days
(d) none of these
Answer
Answer: (a) 28 to 30 days
Question 11.
The number of chromosomes present in human cell are
(a) 25 pairs
(b) 22 pairs
(c) 23 pairs
(d) none of these
Answer
Answer: (c) 23 pairs
Question 12.
The number of sex chromosomes are
(a) three
(b) two
(c) four
(d) none of these
Answer
Answer: (b) two
Question 13.
The age of menopause stage is
(a) 45 to 50 years
(b) 40 to 45 years
(c) 50 to 55 years
(d) none of these
Answer
Answer: (a) 45 to 50 years
Question 14.
The unfertilised egg always has ______ chromosome.
(a) X
(b) Y
(c) XY
(d) XX
Answer
Answer: (a) X
Question 15.
A female has
(a) KY chromosomes
(b) YY chromosomes
(c) XX chromosomes
(d) none of these
Answer
Answer: (c) XX chromosomes
Question 16.
The gametes have only
(a) one set of chromosomes
(b) two sets of chromosomes
(c) three sets of chromosomes
(d) none of these
Answer
Answer: (a) one set of chromosomes
Question 17.
Which of the following is male gonads?
(a) Moustache
(b) Chest
(c) Testes
(d) Hair
Answer
Answer: (c) Testes
Question 18.
Production of thyroxine requires
(a) magnesium
(b) iodine
(c) sodium
(d) bromine
Answer
Answer: (b) iodine
Question 19.
Which of the following determines the sex of the baby?
(a) Chromosomes
(b) Chloroplast
(c) Hormones
(d) Pituitary gland
Answer
Answer: (a) Chromosomes
Question 20.
Pancreas is responsible for maintaining
(a) blood pressure
(b) fat metabolism
(c) blood glucose level
(d) electrolyte balance
Answer
Answer: (c) blood glucose level
II. Fill in the Blanks
Question 1.
_________ means to grow into maturity.
Answer
Answer: Adolescence
Question 2.
Children gain height during _________ .
Answer
Answer: puberty
Question 3.
The boys and girls passing through the adolescence period are called __________ or __________ .
Answer
Answer: adolescents, teenagers
Question 4.
During puberty, a change in voice takes place due to the increase in the size of__________ or __________
Answer
Answer: voice box, larynx
Question 5.
The stage when the menstrual cycle stops is called __________ .
Answer
Answer: menopause
Question 6.
The __________ gland helps in controlling the production of both testosterone and estrogen hormones.
Answer
Answer: pituitary
Question 7.
Diabetes is caused due to the deficiency of__________ in the body.
Answer
Answer: insulin
Question 8.
__________ is caused due to deficiency of thyroxine hormone.
Answer
Answer: Goitre
Question 9.
Endocrine glands are also called _________ glands.
Answer
Answer: ductless
Question 10.
__________ secrets male sex hormones.
Answer
Answer: Testes
Question 11.
__________ secrets female sex hormones.
Answer
Answer: Ovary
Question 12.
Sex of the unborn child depends on whether the _________ has _________ or _________ chromosomes.
Answer
Answer: zygote, XX, XY
Question 13.
Metamorphosis in insects is controlled by _________ hormone.
Answer
Answer: insect
Question 14.
Metamorphosis in frog is controlled by _________ hormone.
Answer
Answer: thyroxine
Question 15.
If the water in which tadpoles are growing does not contain sufficient _________, the tadpoles cannot become adults.
Answer
Answer: iodine
Question 16.
In females, the uterine wall thickens to receive the _________
Answer
Answer: metamorphosis
Question 17.
Endocrine glands release hormones directly into the _________ for transportation to the _________
Answer
Answer: blood stream, target site
Question 18.
_________ helps the body to adjust and fight the stress.
Answer
Answer: Adrenaline
Question 19.
The development of a caterpillar to an adult butterfly is termed as _________
Answer
Answer: zygote
Question 20.
The first menstrual flow begins at and is termed as _________
Answer
Answer: puberty, menarche
III. True or FaIse
Question 1.
The age of adolescence is 15 to 20 years.
Answer
Answer: False
Question 2.
The female puberty starts at the age of 12 to 14 years.
Answer
Answer: False
Question 3.
Boys have enlarged and well developed Adam’s apple.
Answer
Answer: True
Question 4.
Insulin is secreted by pituitary gland.
Answer
Answer: False
Question 5.
The chemical substances secreted by endocrine glands are called hormones.
Answer
Answer: True
Question 6.
Estrogen is female hormone.
Answer
Answer: True
Question 7.
Testosterone is male hormone.
Answer
Answer: True
Question 8.
There are 23 pairs of chromosomes in the nuclei of human cell.
Answer
Answer: True
Question 9.
Menstruation stops in men permanently around the age of 45 to 50 years.
Answer
Answer: False
Question 10.
The estrogen hormone develops deeper voice in males at puberty.
Answer
Answer: False
Question 11.
The sex of an unborn child is determined after a foetus is formed.
Answer
Answer: False
Question 12.
Initially girls grow faster than boys.
Answer
Answer: True
Question 13.
Thyroxine hormone is released by thyroid gland.
Answer
Answer: True
Question 14.
Diabetes is caused due to the deficiency of adrenaline hormone.
Answer
Answer: False
Question 15.
Menstrual cycle in women is controlled by enzyme.
Answer
Answer: False
Question 16.
Growth hormones are secreted by pituitary glands.
Answer
Answer: True
Question 17.
Metamorphosis in insects are controlled by growth hormone.
Answer
Answer: False
Question 18.
Menstruation occurs once in about 28 to 30 days.
Answer
Answer: True
Question 19.
There are 3 sex chromosomes present in the nuclei of human being.
Answer
Answer: False
Question 20.
A male has two X chromosomes.
Answer
Answer: False
Question 21.
The gametes have only one set of chromosomes.
Answer
Answer: True
Question 22.
The unfertilised egg has two X chromosomes.
Answer
Answer: False
Question 23.
At puberty, the voice box or the larynx begins to grow.
Answer
Answer: True
Question 24.
When the zygote has one X and one Y chromosome, a male child is developed.
Answer
Answer: True
Question 25.
Menopause is the stage when menstruation starts.
Answer
Answer: False
IV. Match the following
| Column I | Column II |
| 1. Growth hormones | (a) Voice box |
| 2. Pituitary gland | (b) Thyroxine |
| 3. XX chromosomes | (c) Male child |
| 4. Adrenal gland | (d) Male hormone |
| 5. Thyroid gland | (e) Adrenaline |
| 6. XY chromosomes | (f) Female child |
| 7. Pancreas | (g) Stoppage of menstruation |
| 8. Testosterone | (h) Insulin |
| 9. Menopause | (i) Master gland |
| 10. Adam’s apple | (j) Pituitary gland |
Answer
Answer:
| Column I | Column II |
| 1. Growth hormones | (j) Pituitary gland |
| 2. Pituitary gland | (i) Master gland |
| 3. XX chromosomes | (f) Female child |
| 4. Adrenal gland | (e) Adrenaline |
| 5. Thyroid gland | (b) Thyroxine |
| 6. XY chromosomes | (c) Male child |
| 7. Pancreas | (h) Insulin |
| 8. Testosterone | (d) Male hormone |
| 9. Menopause | (g) Stoppage of menstruation |
| 10. Adam’s apple | (a) Voice box |
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