Class 8 Science Chapter 10 MCQ (Multiple Choice Questions) of reaching the Age of Adolescence updated for academic session 2022-2023. All the MCQs are important for the school unit tests as well as terminal or periodic exams. Practice here MCQ online test with answers and explanation of each questions to prepare the chapter and become confident in all topics of chapter 10 of class 8 science. These MCQ quiz covers the complete chapter 10 reaching the Age of Adolescence from CBSE class viii science.

Class 8 Science Chapter 10 MCQ for 2022-2023

Class: 8Science
Chapter: 10Reaching the Age of Adolescence
Contents:MCQ Online Test with Explanation

MCQ Tests with Answers for Class 8 Science Chapter 10

Q1

The belief that the mother is completely responsible for the sex of the child is wrong because the child:

[A]. Gets sex chromosome only from the mother.
[B]. Develops in the body of the mother.
[C]. Gets one sex chromosome from the mother and the other from the father.
[D]. Gets sex chromosome only from the father.
Q2

Given below are events that lead to pregnancy and development of the embryo. Which of the following options gives the correct order of sequence in which they occur?

[A]. Fertilization of egg, Maturation of egg, Release of egg, Embedding of the embryo in uterus.
[B]. Maturation of egg, Fertilization of egg, Release of egg, Embedding of the embryo in uterus.
[C]. Fertilization of egg, Embedding of the embryo in uterus, Maturation of egg, Release of egg.
[D]. Maturation of egg, Release of egg, Fertilization of egg, Embedding of the embryo in uterus.
Q3

Structures present in a cell which is responsible for determination of the sex of a baby is:

[A]. Cytoplasm
[B]. Cell membrane [C]
[C]. Nucleus
[D]. Chromosome
Q4

Which of the following statement is or are incorrect?

[A]. Reproductive life of a woman lasts from menarche to menopause.
[B]. The development of a caterpillar to an adult butterfly is termed as metamorphosis.
[C]. The overgrowth of muscles in larynx leads to the hoarse voice in adolescent boys.
[D]. The deficiency of adrenaline hormones causes a disease known as goitre.
Q5

Consider the following statements and choose the incorrect one:

[A]. In females, the uterine wall thickens to receive the fertilised egg.
[B]. Endocrine glands release hormones directly into blood stream for transportation to the target site.
[C]. The sex hormones, adrenaline and oestrogen are responsible for the development of sexual characters.
[D]. Release of sex hormones is under the control of a hormone secreted from the pituitary gland.
Q6

Reproductive age in women starts when:

[A]. Menstruation Starts
[B]. Breasts start developing
[C]. Body weight increases
[D]. All the above.
Q7

Read the following sentences carefully, and choose the incorrect one:

[A]. [A] Testosterone hormone produces male secondary sexual characteristics in boys at puberty (such as deeper voice, growth of facial hair etc.)
[B]. Testosterone hormone causes “growth spurt” in boys at puberty.
[C]. Testosterone hormone causes the growth and development of male sex organs at puberty.
[D]. None of the above.
Q8

Reproductive phase in females is form the age of:

[A]. 10 – 12 years to 40 – 45 years.
[B]. 18 – 21 years to 30 – 35 years.
[C]. 21 – 23 years to 40 – 45 years.
[D]. 25 – 30 years to 40 – 45 years.
Q9

Priya is writing some statements, choose the correct statement and help her:

[A]. In a frog, metamorphosis is brought about by thyroxine hormone.
[B]. The production of thyroxine hormone requires the presence of iodine in water.
[C]. All the amphibians need thyroxine hormone to undergo metamorphosis and change from larva into adults.
[D]. All the above.
Q10

Vikash is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?

[A]. Adrenals are endocrine glands.
[B]. Adrenal glands are known as emergency hormone.
[C]. The aldosterone hormone secreted by adrenal glands maintain the correct salt balance in the blood.
[D]. None of the above.
Q11

Full name of “AIDS”. Choose the correct options:

[A]. Auto Immune Disease Symptom
[B]. Acute Immune Deficiency Symptom
[C]. Antiretroviral Infection Disease System
[D]. Acquired Immune Deficiency Syndrome
Q12

The sex of a child is determined by:

[A]. The presence of an X chromosomes in egg (or ovum)
[B]. The presence of a Y chromosomes in sperm
[C]. The egg of father and mother
[D]. The length of the mother’s pregnancy
Q13

Adolescents should be careful about what they eat because 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 feel hungry all the time
[D]. Taste buds are well developed in teenagers
Q14

Choose the statement which are incorrect about drugs:

[A]. Drugs are addictive.
[B]. Drugs do physical harm to the body.
[C]. Drug addicts become irritable and lose interest in their studies or jobs.
[D]. Drugs are less powerful chemical substance and it should be used by anyone.
Q15

Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. Regular physical exercise in fresh air keeps the body fit.
[B]. Regular physical exercise also improves the mental health.
[C]. Physical exercise builds and maintains healthy muscles, bones and joints.
[D]. All the above.
Q16

Some of the problems brought about by early marriage in girls. Choose the incorrect one(s):

[A]. The girls younger than 18 years of age are not prepared for motherhood.
[B]. Early marriage and motherhood cause health problems in the mother.
[C]. Early marriage and motherhood reduces the chances of higher education for girls.
[D]. None of the above.
Q17

In a quiz competition, you are asked a question where you have to choose the statement which is/ are correct?

[A]. A gland which secretes its product into a duct is called an exocrine gland.
[B]. Sweat glands and sebaceous glands or oil glands are exocrine glands.
[C]. A gland which does not have a duct and secretes its product directly into the blood stream, is called an endocrine gland.
[D]. All the above.
Q18

Estrogen hormone performs the following function. Choose the correct functions of this hormones:

[A]. Estrogen hormone produces female secondary sexual characteristics in girls at puberty (i.e., development of breast, broader hips).
[B]. Estrogen hormone causes the growth and development of female sex organs at puberty.
[C]. Estrogen hormone brings about the monthly preparation of uterus for pregnancy.
[D]. All the above.
Q19

Which of the following endocrine gland does not occur as a pair in the human body?

[A]. Adrenal
[B]. Pituitary
[C]. Testis
[D]. Ovary
Q20

Which of the following is the secondary sexual characteristics in females?

[A]. Low pitched voice
[B]. Broadening of chest
[C]. Broadening of hip
[D]. Developing Adam’s apple
Q21

Sebaceous glands and Thyroid gland

[A]. Adrenal glands and Sebaceous glands
[B]. Sebaceous glands and Thyroid gland
[C]. Adrenal glands and Thyroid gland
[D]. Sebaceous glands and Sweat glands
Q22

In a science quiz competition, Payel is asked a question where she had to choose the statement which was/were incorrect?

[A]. Puberty tends to start earlier in girls (female) than in boys (males).
[B]. In this period, the growth of voice box in girls is much more than the growth of voice box in boys.
[C]. The bigger voice box in boys gives deeper voice (or low-pitched voice) to the boys.
[D]. The most conspicuous change during puberty is the sudden increase in the height of boys and girls.

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