Reaching the Age of Adolescence Class 8 MCQ Questions With Answers CBSE

Class 8 Science Chapter 10 MCQs Questions With Answers NCERT

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Reaching the Age of Adolescence Class 8 MCQ

Solving the Reaching the Age of Adolescence Multiple Choice Questions of Class 8 Science Chapter 10 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Reaching the Age of Adolescence Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 10 Science Class 8 and cross-check your answers during preparation.

Question 1.
Reproductive age in women starts when their:
(a) menstruation starts
(b) breasts start developing
(c) body weight increases
(d) height increases

Answer

(b) breasts start developing
Reproductive age in women starts when their menstruation starts.

Question 2.
The right meal for adolescents consists of:
(a) chips, noodles, coke
(b) chapati, dal, vegetables
(c) rice, noodles and burger
(d) vegetable cutlets, chips and lemon drink

Answer

(b) chapati, dal, vegetables
The right meal for adolescents consists of chapati, dal, vegetables.

Question 3.
Which of the following combination of chromosomes lead to the birth of a baby girl:
(a) XX
(b) XY
(c) X
(d) Y

Answer

(a) XX
Combination of chromosomes XX lead to the birth of a baby girl.

Question 4.
Which of the following combination of chromosomes lead to the birth of a baby boy:
(a) XX
(b) XY
(c) X
(d) Y

Answer

(b) XY
Combination of chromosomes XY lead to the birth of a baby boy.

Question 5.
All human beings have pairs of chromosomes in the nuclei of their cells.
(a) 22
(b) 2
(c) 23
(d) 46

Answer

(c) 23
23. All human beings have 23 pairs of chromosomes in the nuclei of their cells. Out of this 22 pairs of chromosomes are called autosomes. 1 pair is called sex chromosome.

Question 6.
The unfertilised egg always has X chromosome.
(a) two
(c) four
(b) one
(d) none of these

Answer

(b) one
The unfertilized egg always has one X chromosome.

Question 7.
‘Goitre’ is a disease of
(a) adrenal gland
(c) pancreas
(b) thyroid gland
(d) none of these

Answer

(b) thyroid gland
‘ Go itre ’ is a disease of thyroid gland.

Question 8.
Which or ht ronowing proIdes iron to our body:
(a) leafy vegetabks
(b) citrus
(c) meat
(d) all of these

Answer

(a) leafy vegetabks
Leafy vegetables, citrus, meat all of these provide iron to our body.

Question 9.
Adreanlia hormone is produced by:
(a) pituitary gland
(b) thyroid gland
(c) adrenal gland
(d) pancreas

Answer

Question 10.
Whea the sperm contributes a Y-chromosome to the egg (ovum) at fertllisatin than the zygole would develop into a:
(a) femaict,hild
(b) malechild
(c) either female or male child
(d) none of these

Answer

(b) malechild
Male child is developed when the sperm contributes a Y chromosome to the egg (ovum) at fertilisation.

Question 11.
Which of the following Is incorrecl:
(a) Girls have high pitched voice
(b) Boys have a deep voice
(c) The voice box of girls is larger than that of boys
(d) The voice box in boys can be seen as a wouudmg part of the throat called Adam’s apple

Answer

Question 12.
The changes which occur at adolescence are controlled by:
(a) enzymes
(b) balanced diet
(c) hormones
(d) none of these

Answer

Question 13.
Which of the following b balmced dirt:
(a) icc-cream and cold drink
(b) meat and egg
(c) roti/rice, dal, vegetables
(d) none of these

Answer

Question 14.
The legal age for marriage of girls in our coaltry is:
(a) 21 years
(b) 18 years
(c) 20 years
(d) 16 years

Answer

(b) 18 years
18 years is the legal age for marriage of girls in our country.

Question 15.
AIDS is teased by a dangerous:
(a) virus HIV
(b) virus VIH
(c) protozoa
(d) bacteria

Answer

(a) virus HIV
AIDS is caused by a dangerous virus HIV.

Question 16.
Hormones reaches to different parts:
(a) with lymph
(b) by ducts
(c) with blood
(d) none of these

Answer

Question 17.
In our body hormones are formed in:
(a) endocrine glands
(b) exocrine glands
(c) kidneys
(d) none of these

Answer

(a) endocrine glands
In our body hormones are formed in endocrine glands.

Question 18.
Which of the following endocrine gland is called master gland:
(a) pituitary gland
(b) adrenals glands
(c) thyroid gland
(d) pancreas

Answer

(a) pituitary gland
Pituitary gland is called master gland.

Question 19.
Which gland secretes insulin:
(a) thyroid gland
(b) pancreas
(c) adrenals
(d) thymus gland

Answer

(b) pancreas
Pancreas secretes insulin.

Question 20.
Which of the following controls sugar in blood:
(a) sex hormone
(b) pancreas
(c) growth hormone
(d) insulin

Answer

(d) insulin
Insulin controls sugar in blood.

Question 21.
Which of the following disease is causes by deficiency of iodine:
(a) goitre
(b) diabetes
(c) scurvy
(d) beri-beri

Answer

(a) goitre
Goitre disease is caused by deficiency of iodine.

Question 22.
Which of the following is secreted by endocrine glands:
(a) harmones
(b) enzymes
(c) digestive juices
(d) all of the above

Answer

(a) harmones
Hormones is secreted by endocrine glands.

Question 23.
Which of the following hormones is secreted by pituitary gland:
(a) insulin
(b) thyroxine
(c) growth
(d) adrenalin

Answer

Question 24.
The necessary element for the formation of thyroxine hormone is:
(a) iron
(b) iodine
(c) calcium
(d) magnesium

Answer

(b) iodine
Iodine element is necessary for the formation of thyroxine hormone.

Question 25.
Which of the following gland secretes thyroxine hormone:
(a) adrenal
(b) thyroid
(c) pituitary
(d) pancreas

Answer

(b) thyroid
Thyroid gland secretes thyroxine hormone.

Question 26.
Which of the following hormone helps at the time of excitement, tear, tension etc:
(a) adrenalin
(b) insulin
(c) growth
(d) thyroxine

Answer

(a) adrenalin
Adrenalin hormone helps at the time of excitement, tear, tension etc.

Question 27.
Menarche is:
(a) beginning of menstrual flow
(b) stoppage of menstrual flow
(c) attachment of embryo with the uterus
(d) none of these

Answer

(a) beginning of menstrual flow
Menarche is beginning of menstrual flow.

Question 28.
Menopause is:
(a) beginning of menstrual flow
(b) stoppage of menstrual flow
(c) attachment of embryo with the uterus
(d) none of these

Answer

(b) stoppage of menstrual flow
Menopause is stoppage of menstrual flow.

Question 29.
‘Puberty’ is the age at which the:
(a) reproductive system stops
(b) reproductive system becomes functional
(c) person starts talking
(d) none 6 these

Answer

(b) reproductive system becomes functional
‘Puberty’ is the age at which the reproductive system becomes functional.

Question 30.
Adolescents should be careful about what they eat, because:
(a) proper diet develops their brains
(b) proper diet is needed for the rapid growth taking place in their body
(c) adolescents feels hungry all the time
(d) taste buds are well-developed in teenagers.

Answer

(b) proper diet is needed for the rapid growth taking place in their body
Adolescents should be careful about what they eat, because proper diet is needed for the rapid growth taking place in their body.

Match the Column-A with Column-B:

Question 1.

Column-A	Column-B
(a) Pituitary gland	(i) Testoterone
(b) Thyroid	(ii) Insulin
(c) Pancreas	(iii) Estrogen
(d) Adrenal	(iv) Thyroxine
(e) Ovary	(v) Growth hormone
(d) Testis	(vi) Adrenaline

Answer

Column-A	Column-B
(a) Pituitary gland	(v) Growth hormone
(b) Thyroid	(iv) Thyroxine
(c) Pancreas	(ii) Insulin
(d) Adrenal	(vi) Adrenaline
(e) Ovary	(iii) Estrogen
(d) Testis	(i) Testoterone

Question 2.

Column-A	Column-B
(a) XX chromosomes in zygote	(i) Male hormone
(b) XY chromosomes in zygote	(ii) Female hormone
(c) Estrogen	(iii) Male child
(d) Testosterone	(iv) Female child

Answer

Column-A	Column-B
(a) XX chromosomes in zygote	(iv) Female child
(b) XY chromosomes in zygote	(iii) Male child
(c) Estrogen	(ii) Female hormone
(d) Testosterone	(i) Male hormone

Question 3.

Column-A	Column-B
(a) Proteins	(i) Carrots
(b) Carbohydrates	(ii) Dal
(c) Vitamins	(iii) Leafy vegetables
(d) Iron	(iv) Roti

Answer

Column-A	Column-B
(a) Proteins	(ii) Dal
(b) Carbohydrates	(iv) Roti
(c) Vitamins	(i) Carrots
(d) Iron	(iii) Leafy vegetables

State whether the following statements are True or False:

Question 1.
The voice of girls becomes high pitched at puberty.

Answer

True

Question 2.
The unfertilised egg is called foetus.

Answer

False

Question 3.
The egg cells are larger than sperms.

Answer

True

Question 4.
In human females, one mature egg is produced every four weeks by each of the ovaries.

Answer

False

Question 5.
At puberty, the larynx beings to grow.

Answer

True

Question 6.
Humans become capable of reproduction after puberty sets in.

Answer

True

Question 7.
Pancreas secretes thyroxine.

Answer

False

Question 8.
AIDS is caused by HIV virus.

Answer

True

Question 9.
The mother is responsible for the sex of her child.

Answer

False

Question 10.
Metamorphosis in insects is controlled by insect hormones.

Answer

True

Question 11.
Chips and tinned snacks have adequate nutritional value.

Answer

False

Question 12.
Adrenalin hormone is necessary for growth of a person.

Answer

False

Question 13.
Deficiency of hormone insulin causes ‘diabetes’.

Answer

True

Question 14.
A female has two X chromosomes.

Answer

True

Question 15.
The sex chromosome of the father determine the sex of an unborn baby.

Answer

True

Fill in the blanks:

Question 1.
In male, the sex chromosomes consists of one X and one ………………………… chromosome.

Answer

Question 2.
Hormones are produced by ………………………….

Answer

endocrine glands

Question 3.
The master gland in the body is …………………………

Answer

pituitary gland

Question 4.
………………………… disease is caused due to the deficiency of hormone thyroxine.

Answer

Goitre

Question 5.
Protruding voice box in boys is called …………………………

Answer

Adam’s apple

Question 6.
Glands without ducts are …………………………

Answer

endocrine

Question 7.
Endocrine gland attached to brain is …………………………

Answer

pituitary

Question 8.
Female hormone is …………………………

Answer

estrogen

Question 9.
Male hormone is ………………………….

Answer

testosterone

Question 10.
Another term for teenage is …………………………

Answer

adolescence

Question 11.
………………………… is the term for changes at adolescence.

Answer

Puberty

Question 12.
Voice box is …………………………

Answer

larynx

Question 13.
Pancreatic hormone is …………………………

Answer

insulin

Question 14.
Hormones reaches through blood stream at …………………………

Answer

target sites

Question 15.
………………………… gland secretes thy roxine

Answer

Thyroid

Question 16.
………………………… is the secretion of endocrine glands.

Answer

Hormones

Question 17.
………………………… is the first menstrual flow at puberty.

Answer

Menarche

Question 18.
………………………… is stoppage of menstruation.

Answer

Menopause

Question 19.
Fertilised egg gets embedded in the ………………………… for further development.

Answer

uterus

Question 20.
Thyroid and adrenals secrete their hormones when they receive orders from the ………………………… through its hormones.

Answer

pituitary

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Class 8 Science MCQ