MCQ Questions for Class 10 Science Chapter 7 Control and Coordination with Answers

1. Which statement is not true about thyroxin?

A.Iron is essential for the synthesis of thyroxin
B. It regulates carbohydrates, protein and fat metabolism in the body
C. Thyroid gland requires iodine to synthesise thyroxin
D. Thyroxin is also called thyroid hormone

ANSWER= A.Iron is essential for the synthesis of thyroxin

 

2. Dwarfism results due to

A. Excess secretion of thyroxin
B. Less secretion of growth hormone
C. Less secretion of adrenaline
D. Excess secretion of growth hormone

ANSWER= B. Less secretion of growth hormone

 

3. Dramatic changes of body features associated with puberty are mainly because of secretion of

A. oestrogen from testes and testosterone from ovary
B. estrogen from adrenal gland and testosterone from pituitary gland
C. testosterone from testes and estrogen from ovary
D. testosterone from thyroid gland and estrogen from pituitary gland

ANSWER= C. testosterone from testes and estrogen from ovary

 

4. A doctor advised a person to take an injection of insulin because

A. his blood pressure was low
B. his heart was beating slowly
C. he was suffering from goitre
D. his sugar level in blood was high

ANSWER= D. his sugar level in blood was high

 

5. The hormone which increases the fertility in males is called

A. oestrogen
B. testosterone
C. insulin
D. growth hormone

ANSWER= B. testosterone

 

6. Which of the following endocrine glands is unpaired?

A. Adrenal
B. Testes
C. Pituitary
D. Ovary

ANSWER= C. Pituitary

 

7. Junction between two neurons is called

A. cell junction
B. neuro muscular junction
C. neural joint
D. synapse

ANSWER= D. synapse

 

8. In humans, the life processes are controlled and regulated by

A. reproductive and endocrine systems
B. respiratory and nervous systems
C. endocrine and digestive systems
D. nervous and endocrine systems

ANSWER= D. nervous and endocrine systems

 

9. Which plant hormone promotes dormancy in seeds and buds?

A. Auxin
B. Gibberellin
C. Cytokinin
D. Abscisic acid

ANSWER= D. Abscisic acid

 

10. Roots of plants are:

A. positively geotropic
B. negatively geotropic
C. positively phototropic
D. None of these

ANSWER= A. positively geotropic

 

11. Response of plant roots towards water is called:

A. Chemotropism
B. Phototropism
C. Hydrotropism
D. Geotropism

ANSWER= C. Hydrotropism

 

12. Movement of sunflower in accordance with the path of Sun is due to

A. Chemotropism
B. Geotropism
C. Phototropism
D. Hydrotropism

ANSWER= C. Phototropism

 

13. Which plant hormone promotes cell division?

A. Auxin
B. Gibberellin
C. Cytokinin
D. Abscisic acid

ANSWER= C. Cytokinin

 

14. The main function of abscisic acid in plants is

A. to promote cell division.
B. to inhibit growth.
C. to promote growth of stem.
D. to increase the length of cells.

ANSWER= B. to inhibit growth.

 

15. Which of the following statements is correct about receptors?

A. Gustatory receptors detect taste while olfactory receptors detect smell
B. Both gustatory and olfactory receptors detect smell
C. Auditory receptors detect smell and olfactory receptors detect taste
D. Olfactory receptors detect taste and gustatory receptors smell

ANSWER= A. Gustatory receptors detect taste while olfactory receptors detect smell

 

16. Electrical impulse travels in a neuron from

A. Dendrite axon → axonal end → cell body
B. Cell body → dendrite → axon → axonal end
C. Dendrite → cell body → axon → axonal end
D. Axonal end → axon → cell body → dendrite

ANSWER= C. Dendrite → cell body → axon → axonal end

 

17. In a synapse, chemical signal is transmitted from

A. dendritic end of one neuron to axonal end of another neuron
B. axon to cell body of the same neuron
C. cell body to axonal end of the same neuron
D. axonal end of one neuron to dendritic end of another neuron

ANSWER= D. axonal end of one neuron to dendritic end of another neuron

 

18. In a neuron, conversion of electrical signal to a chemical signal occurs at/in

A. cell body
B. axonal end
C. dendritic end
D. axon

ANSWER= B. axonal end

 

19. Posture and balance of the body is controlled by

A. cerebrum
B. cerebellum
C. medulla
D. pons

ANSWER= B. cerebellum

 

20. Spinal cord originates from

A. cerebrum
B. medulla
C. pons
D. cerebellum

ANSWER= B. medulla

 

21. The movement of shoot towards light is

A. geotropism
B. hydrotropism
C. chemotropism
D. phototropism

ANSWER= D. phototropism

 

22. The main function of abscisic acid in plants is to

A. increase the length of cells
B. promote cell division
C. inhibit growth
D. promote growth of stem

ANSWER= C. inhibit growth

 

23. Which of the following is not associated with growth of plant?

A. Auxin
B. Gibberellins
C. Cytokinins
D. Abscisic acid

ANSWER= D. Abscisic acid

 

24. Iodine is necessary for the synthesis of which hormone?

A. Adrenaline
B. Thyroxin
C. Auxin
D. Insulin

ANSWER= B. Thyroxin

 

25. Choose the incorrect statement about insulin

A. It is produced from pancreas
B. It regulates growth and development of the body
C. It regulates blood sugar level
D. Insufficient secretion of insulin will cause diabetes

ANSWER= B. It regulates growth and development of the body

 

26. Select the mis-matched pair:

A. Adrenaline : Pituitary gland
B. Testosterone : Testes
C. Estrogen : Ovary
D. Thyroxin : Thyroid gland

ANSWER= A. Adrenaline : Pituitary gland

 

27. The shape of guard cells changes due to change in the

A. protein composition of cells
B. temperature of cells
C. amount of water in cells
D. position of nucleus in the cells

ANSWER= C. amount of water in cells

 

28. The growth of tendril in pea plants is due to

A. effect of light
B. effect of gravity
C. rapid cell divisions in tendrillar cells that are away from the support
D. rapid cell divisions in tendrillar cells in contact with the support

ANSWER= C. rapid cell divisions in tendrillar cells that are away from the support

 

29. The growth of pollen tubes towards ovules is due to

A. hydrotropism
B. chemotropism
C. geotropism
D. phototropism

ANSWER= B. chemotropism

 

30. The movement of sunflower in accordance with the path of Sun is due to

A. phototropism
B. geotropism
C. chemotropism
D. hydrotropism

ANSWER= A. phototropism

 

31. The substance that triggers the fall of mature leaves and fruits from plants is due to

A. auxin
B. gibberellin
C. abscisic acid
D. cytokinin

ANSWER= C. abscisic acid

 

32. Involuntary actions in the body are controlled by

A. medulla in fore brain
B. medulla in mid brain
C. medulla in hind brain
D. medulla in spinal cord

ANSWER= C. medulla in hind brain

 

33. Which of the following is not an involuntary action?

A. Vomiting
B. Salivation
C. Heart beat
D. Chewing

ANSWER= D. Chewing

 

34. When a person is suffering from severe cold, he or she cannot

A. differentiate the taste of an apple from that of an ice cream
B. differentiate the smell of a perfume from that of an agarbatti
C. differentiate red light from green light
D. differentiate a hot object from a cold object

ANSWER= B. differentiate the smell of a perfume from that of an agarbatti

😊😊😊

आपके टोटल मार्क्स कितने आए? ... कमेंट करना मत भूलना...!!!