Here we are providing Class 8 Science Objective Chapter – 10 Reaching the Age of Adolescence because its very important for Class 8 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 8 Science Objective Chapter – 10 Reaching the Age of Adolescence is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 8 Science Objective Chapter – 10 Reaching the Age of Adolescence Wastewater Story 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 8 Science Objective Chapter – 10 Reaching the Age of Adolescence
1.The adolescence period is
( A ) 14 – 20 years
( B ) 10 – 18 years
( C ) 11 – 19 years
( D ) none of these
Ans – ( C )
2.All human beings have pairs of chromosomes in the nuclei of their cells.
( A ) 22
( B ) 2
( C ) 23
( D ) 46
Ans – ( C )
3. The chemical substances which are secreted from endocrine glands are called
( A ) puberty
( B ) hormones
( C ) estrogen
( D ) adolescence
Ans – ( B )
4.The unfertilised egg always has X chromosome.
( A ) two
( C ) four
( B ) one
( D ) none of these
Ans – ( B )
5.Larynx is called
( A ) music box
( B ) voice box
( C ) respiratory organ
( D ) sound box
Ans – ( B )
6.‘Goitre’ is a disease of
( A ) adrenal gland
( C ) pancreas
( B ) thyroid gland
( D ) none of these
Ans – ( B )
7. How many pairs of Chromosomes are found in nuclei of their cells?
( A ) 22 pairs
( B ) 23 pairs
( C ) 24 pairs
( D ) 25 pairs
Ans – ( B )
8.Which or ht ronowing proIdes iron to our body:
( A ) leafy vegetabks
( B ) citrus
( C ) meat
( D ) all of these
Ans – ( A )
9.Most adolescents attain their maximum height around the age of
( A ) 22 – 25 years
( B ) 13 – 15 years
( C ) 11 – 12 years
( D ) 18 – 19 years
Ans – ( D )
10. Which of the following will occur in females at puberty?
( A ) Ovulation
( B ) Enlargement of breasts
( C ) Broadening of hips
( D ) All of these
Ans – ( D )
11.Adreanlia hormone is produced by:
( A ) pituitary gland
( B ) thyroid gland
( C ) adrenal gland
( D ) pancreas
Ans – ( C )
12.Initially girls grow
( A ) slower than boys
( B ) faster than boys
( C ) both of these
( D ) none of these
Ans – ( B )
13.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
Ans – ( B )
14. Puberty ends when an adolescent reaches
( A ) Reproductive maturity
( B ) Physical maturity
( C ) Birth maturity
( D ) Growth maturity
Ans – ( A )
15.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
Ans – ( C )
16.Puberty age in females is
( A ) 10 – 12 years
( B ) 12 – 14 years
( C ) 8 – 10 years
( D ) 5 – 6 years
Ans – ( A )
17.The changes which occur at adolescence are controlled by:
( A ) enzymes
( B ) balanced diet
( C ) hormones
( D ) none of these
Ans – ( C )
18. The menstrual cycle stops in a women at about 50 years old. The woman is said to have reached
( A ) puberty.
( B ) menopause.
( C ) menarche.
( D ) adolescence.
Ans – ( B )
19.Puberty age in males is
( A ) 12 – 14 years
( B ) 13 – 15 years
( C ) 10 – 12 years
( D ) 18 – 20 years
Ans – ( A )
20.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
Ans – ( C )
21. Which of the following does not take place during the final stage of the menstrual cycle?
( A ) Further thickening of the uterine lining.
( B ) Repair and growth of the uterine lining.
( C ) Ovulation.
( D ) Both ( B ) and (C)
Ans – ( C )
22.Thyroxine hormone is produced by
( A ) adrenal gland
( B ) testes
( C ) pituitary gland
( D ) thyroid gland
Ans – ( D )
23.The legal age for marriage of girls in our coaltry is:
( A ) 21 years
( B ) 18 years
( C ) 20 years
( D ) 16 years
Ans – ( B )
24. Which one is another terms for teenage is
( A ) Maturity
( B ) Puberty
( C ) Adolescence
Ans – ( C )
25.The male hormone is called
( A ) estrogen
( B ) testosterone
( C ) thyroxine
( D ) insulin
Ans – ( B )
26. Larynx is called
( A ) Voice Box
( B ) Music Box
( C ) Respiratory organ
( D ) None of these
Ans – ( A )
27.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
Ans – ( B )
28.AIDS is teased by a dangerous:
( A ) virus HIV
( B ) virus VIH
( C ) protozoa
( D ) bacteria
Ans – ( A )
29.Children gain height during
( A ) adolescence
( B ) endocrine
( C ) balanced food
( D ) menarche
Ans – ( A )
30.The female hormone is called
( A ) estrogen
( B ) testosterone
( C ) adrenaline
( D ) none of these
Ans – ( A )
31. Glands without ducts
( A ) Mammary gland
( B ) Exocrine gland
( C ) Endocrine glands
( D ) Pancreatic gland
Ans – ( C )
32.Testes secrete
( A ) thyroxin
( B ) estrogen
( C ) testosterone
( D ) iodine
Ans – ( C )
33.Menstruation occurs once in about
( A ) 28 to 30 days
( B ) 25 to 30 days
( C ) 45 to 50 days
( D ) none of these
Ans – ( A )
34. Sebaceous gland is also known as
( A ) Pancreatic gland
( B ) Oil gland
( C ) Sweat gland
( D ) Mater gland
Ans – ( B )
35.The number of chromosomes present in human cell are
( A ) 25 pairs
( B ) 22 pairs
( C ) 23 pairs
( D ) none of these
Ans – ( C )
36.Adam’s apple is
( A ) enlarged larynx
( B ) mammary glands
( C ) apple of adam
( D ) red apple
Ans – ( A )
37. Thyroxine is produced by
( A ) Pituitary gland
( B ) Adrenal gland
( C ) Thyroid gland
( D ) Testes
Ans – ( C )
38.The number of sex chromosomes are
( A ) three
( B ) two
( C ) four
( D ) none of these
Ans – ( B )
39.Out of these which one determines the sex of the baby?
( A ) Hormones
( B ) Chloroplast
( C ) Chromosomes
( D ) Pituitary gland
Ans – ( C )
40. In girls, secondary sexual characteristics develop between
( A ) 9 and 11 years.
( B ) 11 and 14 years.
( C ) 15 and 18 years.
( D ) 19 and 21 years.
Ans – ( C )
41.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
Ans – ( A )
42.What is the stoppage of menstruation called?
( A ) Menarche
( B ) Menopause
( C ) Gametes
( D ) Insulin
Ans – ( B )
43. Adolescence begins around the age of
( A ) 18 years
( B ) 13 years
( C ) 25 years
( D ) 11 years
Ans – ( D )
44.The unfertilised egg always has ______ chromosome.
( A ) X
( B ) Y
( C ) XY
( D ) XX
Ans – ( A )
45. The most clearly visible change during puberty is the
( A ) Sudden change of hip size
( B ) Sudden formation of breast
( C ) Slow growth of head
( D ) Sudden increase in height
Ans – ( D )
46.A female has
( A ) XY chromosomes
( B ) YY chromosomes
( C ) XX chromosomes
( D ) none of these
Ans – ( C )
47. Initially girls grow _____ than boys.
( A ) Faster
( B ) Slower
( C ) Both of these
( D ) None of these
Ans – ( A )
48.The gametes have only
( A ) one set of chromosomes
( B ) two sets of chromosomes
( C ) three sets of chromosomes
( D ) none of these
Ans – ( A )
49. In general, boys have a Low pitch voice while the girls have
( A ) Low pitch voice
( B ) Hoarse voice
( C ) Deep voice
( D ) High pitch voice
Ans – ( D )
50.Which of the following is male gonads?
( A ) Moustache
( B ) Chest
( C ) Testes
( D ) Hair
Ans – ( C )
51. Progesterone level falls during
( A ) Menopause
( B ) Lactation
( C ) Gestation
( D ) Menstruation
Ans – ( A )
52.Production of thyroxine requires
( A ) magnesium
( B ) iodine
( C ) sodium
( D ) bromine
Ans – ( B )
53. Which among the boys and girls puberty starts earlier?
( A ) Any one
( B ) Boys
( C ) Girls
( D ) Both together
Ans – ( C )
54.Which of the following determines the sex of the baby?
( A ) Chromosomes
( B ) Chloroplast
( C ) Hormones
( D ) Pituitary gland
Ans – ( A )
55. Incomplete development of male secondary sexual characteristics is caused due to deficiency in?
( A ) Estrogen.
( B ) Progesterone.
( C ) Adrenaline.
( D ) Testosterone.
Ans – ( D )
56.Pancreas is responsible for maintaining
( A ) blood pressure
( B ) fat metabolism
( C ) blood glucose level
( D ) electrolyte balance
Ans – ( C )
57. Which of the following is NOT a secondary sexual characteristic feature of girls?
( A ) The enlargement of breasts.
( B ) The deepening of voice.
( C ) The menstruation begins.
( D ) The growth of hair at armpit.
Ans – ( B )
58.Adolescence usually ends at which age?
( A ) 18 years
( B ) 17 years
( C ) 16 years
( D ) 15 years
Ans – ( A )
59. Deficiency of which hormone cause diabetes?
( A ) Insulin
( B ) Estrogen
( C ) Testosterone
( D ) Thyroxin
Ans – ( A )
60.Which hormone is responsible for the secondary sexual characters in girls?
( A ) Estrogen
( B ) Testosterone
( C ) Thyroxine
( D ) Adrenaline
Ans – ( A )
61. Puberty age in females is
( A ) 10 to 12 years
( B ) 12 to 14 years
( C ) 8 to 10 years
( D ) More than 14 years.
Ans – ( A )
62.What is the normal duration of menstrual cycle?
( A ) 2 to 7 days
( B ) 14 days
( C ) 28 to 30 days
( D ) 40 weeks
Ans – ( C )
63. Menstrual cycle is controlled by
( A ) Time duration
( B ) Physical activity
( C ) Food habit
( D ) Hormones
Ans – ( D )
64.Reproductive phase in women continues for how many decades?
( A ) One
( B ) Two
( C ) Three
( D ) Four
Ans – ( D )
65. The right meals for adolescents consist of
( A ) Chips, noodles, coke
( B ) Rice, noodles and burger
( C ) Chapatti, dal, vegetable
( D ) Vegetable cutlets, chips and lemon drink
Ans – ( C )
66.Which hormone is secreted by pancreas?
( A ) Thyroxine
( B ) Insulin
( C ) Adrenaline
( D ) Testosterone
Ans – ( B )
67. Which chromosomes determine the sex of an individual?
( A ) Autosomes
( B ) Allosomes
( C ) Plasmid
( D ) Giant chromosomes
Ans – ( B )
68.Iodine is essential for proper working of which of the following endocrine glands?
( A ) Thyroid
( B ) Pituitary
( C ) Adrenal
( D ) Pancreas
Ans – ( A )
69. Which of the following statements is true?
( A ) Boys reach puberty at an earlier age than girls.
( B ) Girls reach puberty earlier than boys.
( C ) At the end of rapid growth, girls are normally heavier than boys.
( D ) Between the age of 4 to 12, girls grow faster than boys.
Ans – ( B )
70.Which of the following glands secretes the growth hormone?
( A ) Thyroid
( B ) Pituitary
( C ) Adrenal
( D ) Testis
Ans – ( B )
71.Reproductive age in women starts when their:
( A ) menstruation starts
( B ) breasts start developing
( C ) body weight increases
( D ) height increases
Ans – ( B )
72.Which of the following glands secretes oil?
( A ) Thyroid gland
( B ) Pituitary gland
( C ) Sebaceous gland
( D ) Endocrine gland
Ans – ( C )
73.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
Ans – ( B )
74.Which of the following is the male hormone that is secreted by the testes at the onset of puberty?
( A ) Estrogen
( B ) Insulin
( C ) Adrenalin
( D ) Testosterone
Ans – ( D )
75.Which of the following combination of chromosomes lead to the birth of a baby girl:
( A ) XX
( B ) XY
( C ) X
( D ) Y
Ans – ( A )
76.The female hormone secreted by the ovaries at the onset of puberty is
( A ) estrogen
( B ) insulin
( C ) adrenalin
( D ) testosterone
Ans – ( A )
77.Which of the following combination of chromosomes lead to the birth of a baby boy:
( A ) XX
( B ) XY
( C ) X
( D ) Y
Ans – ( A )
