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MCQ Question for Class 10 Science Chapter 7 Control and Coordination with Answer
1. Which plant hormone promotes dormancy in seeds and buds?
(a) Auxin
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
Answer: d
2. Roots of plants are:
(a) positively geotropic
(b) negatively geotropic
(c) positively phototropic
(d) None of these
Answer: a
3. Response of plant roots towards water is called:
(a) Chemotropism
b) Phototropism
(c) Hydrotropism
(d) Geotropism
Answer: c
4. Movement of sunflower in accordance with the path of Sun is due to
(a) Chemotropism
(b) Geotropism
(c) Phototropism
(d) Hydrotropism
Answer: c
5. Which plant hormone promotes cell division?
(a) Auxin
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
Answer: c
6. 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
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
Answer: d
8. Any change in the environment to which an organism responds is called
(a) stimulus
(b) coordination
(c) response
(d) hormone
Answer: a
9. 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
Answer: b
10. The longest fibre on the cell body of a neuron is called
(a) sheath
(b) cytoplasm
(c) axon
(d) dendrites
Answer: c
11. 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
Answer: b
12. A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called
(a) neurotransmitter
(b) dendrites
(c) axon
(d) synapse
Answer: d
13
Give the missing term.
(a) Spinal cord
(b) Brain
(c) Cranial nerves
(d) Relay nerves
Answer: a
14. The highest coordinating centre in the human body is
(a) spinal cord
(b) heart
(c) brain
(d) kidney
Answer: c
15. Main function of cerebrum is
(a) thinking
(b) hearing
(c) memory
(d) balancing
Answer: a
16. Posture and balance of the body is controlled by
(a) Pons
(b) Medulla oblongata
(c) Cerebellum
(d) Cerebrum
Answer: c
17. Breathing is controlled by which part of the brain?
(a) Cerebrum
(b) Cerebellum
(c) Hypothalamus
(d) Medulla oblongata
Answer: d
18. Which part of nervous system controls the re¬flex activities of the body?
(a) Brain
(b) Spinal cord
(c) Cerebrum
(d) Cerebellum
Answer: b
19. Which of the following acts as both endocrine and exocrine gland?
(a) Pancreas
(b) Thyroid
(c) Adrenal
(d) Liver
Answer: a
20. 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.
Answer: d
21. Which gland secretes the growth hormone?
(a) Pituitary gland
(b) Thyroid
(c) Hypothalamus
(d) Adrenal
Answer: a
22. The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age?
(a) Oestrogen from testes and testosterone from ovar.
(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
23. A diabetic patient suffers from deficiency of which hormone?
(a) Thyroxine
(b) Testosterone
(c) Oestrogen
(d) Insulin
Answer: d
24. Which of the following endocrine glands does not exist in pairs?
(a) Testes
(b) Adrenal
(c) Pituitary
(d) Ovary
Answer: c
Fill in the Blanks Question for Class 10 Science Chapter 7 Control and Coordination with Answer
1. Control and coordination are the functions of the nervous system and ……… in our body.
2. The nervous system uses ……… impulses to transmit messages.
3. Central nervous system consists of ……… and ……… .
4. Largest part of the brain is ……… .
5. Defeciency of ……… hormone in childhood leads to dwarfism in humans.
6. The growth of pollen tubes towards the ovules is the result of a ……… movement.
Answers
1. hormones
2. electrical
3. brain, spinal cord
4. cerebrum
5. growth
6. chemotropic
