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MCQ Questions for Class 10 Science: Ch 7 Control and Coordination

1. The brain is lodged inside the cavity of skull known as :
a) Piamater
b) Duramater
c) Cranium
d) Meninges
► c) Cranium

2. Roots of plants are:
(a) positively geotropic
(b) negatively geotropic
(c) positively phototropic
(d) None of these
► (a) positively geotropic

3. Which plant hormone promotes cell division?
(a) Auxin
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
► (c) Cytokinin

4. Which plant hormone promotes dormancy in seeds and buds?
(a) Auxin
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
► (d) Abscisic acid

5. When a person is suffering from severe cold, he or she cannot –
a) Differentiate the taste of an apple form that of an ice – cream.
b) Differentiate red light from green light.
c) Differentiate a hot object form a cold object.
d) Differentiate the smell of a perfume form that of an agarbatti
► (d) Differentiate the smell of a perfume form that of an agarbatti.

6. Response of plant roots towards water is called:
(a) Chemotropism
(b) Phototropism
(c) Hydrotropism
(d) Geotropism
► (c) Hydrotropism

7. Fall of mature leaves and fruits from plants is triggered by which of the following substance?
(a) Auxin
(b) Cytokinin
(c) Gibberellin
(d) Abscisic acid
► (d) Abscisic acid

8. Movement of sunflower in accordance with the path of Sun is due to
(a) Chemotropism
(b) Geotropism
(c) Phototropism
(d) Hydrotropism
► (c) Phototropism

9.  Junctions of two neurons in called.
a) Synapse
b) Synapsis
c) Joint
d) Junction
► a) Synapse

10. 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.
► (b) to inhibit growth.

11. Which gland secretes the growth hormone?
(a) Pituitary gland
(b) Thyroid
(c) Hypothalamus
(d) Adrenal
► (a) Pituitary gland

12. Which of the following acts as both endocrine and exocrine gland?
(a) Pancreas
(b) Thyroid
(c) Adrenal
(d) Liver
► (a) Pancreas

13. Which of the following is a plant hormone?
a) Insulin
b) Thyroxin
c) Oestrogen
d) Cytokinin
►d) Cytokinin

14. Breathing is controlled by which part of the brain?
(a) Cerebrum
(b) Cerebellum
(c) Hypothalamus
(d) Medulla oblongata
► (d) Medulla oblongata

15. Main function of cerebrum is
(a) thinking
(b) hearing
(c) memory
(d) balancing
► (a) thinking

16. Which nerves transmit impulses from the cen¬tral nervous system towards muscle cells?
(a) Sensory nerves
(b) Motor nerves
(c) Relay nerves
(d) Cranial nerves
► (b) Motor nerves

17.  The neurons that carry nerve impulse from spinal cord to effectors are called:
a) Sensory neurons
b) motor neurons
c) Inteneurons
d) spinal neurons
► b) motor neurons.

18. The substance that result into the fall of mature leave and fruits from plants is due to :
a) auxin
b) gibberllin
c) ABA
d) cytokinin
► b) gibberllin

19. Visceral nervous system controls and integrates the function of –
a) Urinary bladder
b) Blood vessels
c) Heart
d) All of the above
► d) All of the above

20. A part of the body which responds to the in-structions sent from nervous system is called
(a) receptor
(b) effector
(c) nerves
(d) muscles
► (b) effector

21. Identify which of the following statements about thyroxin is incorrect?
(a) Thyroid gland requires iodine to synthesize thyroxin.
(b) Thyroxin is also called thyroid hormone.
(c) It regulates protein, carbohydrates and fat metabolism in the body.
(d) Iron is essential for the synthesis of thyroxin.
► (d) Iron is essential for the synthesis of thyroxin.

22. Which part of nervous system controls the reflex activities of the body?
(a) Brain
(b) Spinal cord
(c) Cerebrum
(d) Cerebellum
► (b) Spinal cord

23. Select the mismatched pair
a) Adrenaline – Pituitary gland
b) Testosterone – Testes
c) Estrogen – Ovary
d) Thyroxin – Thyroid gland.
► a) Adrenaline – Pituitary gland

24. Which of the following is a plant hormone?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinins
► (d) Cytokinins

25. Posture and balance of the body is controlled by
(a) Pons
(b) Medulla oblongata
(c) Cerebellum
(d) Cerebrum
► (c) Cerebellum

26. The highest coordinating centre in the human body is
(a) spinal cord
(b) heart
(c) brain
(d) kidney
► (c) brain

27. The longest fibre on the cell body of a neuron is called
(a) sheath
(b) cytoplasm
(c) axon
(d) dendrites
► (c) axon

28. Any change in the environment to which an organism responds is called
(a) stimulus
(b) coordination
(c) response
(d) hormone
► (a) stimulus

29. Which of the following tissues provide control and coordination in animals?
(a) Nervous and Skeletal
(b) Muscular and Skeletal
(c) Muscular and Transport
(d) Nervous and Muscular
► (d) Nervous and Muscular

30. How many pairs of cranial nerves are present in man?
(a) 12
(b) 21
(c) 31
(d) 41
► (a) 12

31. The hormone that is used to keep flowers fresh is
(a) cytokinin
(b) gibberellins
(c) auxin
(d) abscisic acid
► (a) cytokinin

32. Reflex actions are mediated through
(a) brain
(b) effectors
(c) spinal cord
(d) receptors
► (c) spinal cord

33. Which statement is incorrect about auxins?
(a) They promote the growth of root
(b) They promote the growth of shoot
(c) They influence the formation of flower and ripening of fruit
(d) They inhibit the growth of root
► (a) They promote the growth of root

34. The main effect of cytokinin in plants is to
(a) improve the quality of fruits
(b) prevent the growth of lateral buds
(c) regulate opening and closing of stomata
(d) stimulate cell division
► (d) stimulate cell division

35. Ageing in human beings is caused by disappearance of which of the following glands?
(a) Adrenal
(b) Pituitary
(c) Thyroid
(d) Thymus
► (d) Thymus

36. Which hormone regulates the ionic balance in the body?
(a) Glucagon
(b) Thyroxine
(c) Testosterone
(d) Vasopressin
► (d) Vasopressin

37. Which endocrine gland is also known as ‘master gland’?
(a) Pancreas
(b) Adrenal
(c) Pituitary
(d) Hypothalamus
► (c) Pituitary

38. Which of the following is not associated with growth of plant?
(a) Auxin
(b) Gibberellins
(c) Cytokinins
(d) Abscisic acid
► (d) Abscisic acid

39. Which of the following is not a ductless gland?
(a) Adrenal
(b) Liver
(c) Thyroid
(d) Pituitary
► (b) Liver

40. Which of the following acts as both endocrine and exocrine glands?
(a) Adrenal
(b) Pituitary
(c) Ovaries
(d) Pancreas
► (d) Pancreas

41. Assertion: Impulse travels from dendrite to cell body and then along the axon to its end.
Reason: Information acquired at the end of the dendrite tip of a nerve cell sets of an electric impulse.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
► (a) Both A and R are true and R is the correct explanation of A.

42. Assertion: Reflex Arc works faster than thinking process of brain.
Reason: Reflex Arc works in case of those animals who donot have thinking process.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
► (c) A is true but R is false.

43. Assertion: On attaining puberty, breast size increases and reproductive organs develop in females.
Reason: Ovaries release hormone proges-terone in female.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
► (b) Both A and R are true but R is not the correct explanation of A.

44. Assertion: Brain is a delicate organ which is protected from injury.
Reason: The bony box protects the brain from any shock.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
► (c) A is true but R is false.

45. Assertion: Plants do have a nervous system for control and coordination.
Reason: Plants use electro chemical means to convey information from cell to cell.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
► (d) A is false but R is true.
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