MCQs for Class 10 Science Chapter 7 Control and Coordination: In this article, we have covered all the important MCQs for Free for Class 10 Term 1 2021-22 Board Exams. In accordance with the latest pattern, Padhle is here with MCQ Questions for Class 10.

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Class 10 for MCQ Science Chapter 7 Control and Coordination

Question 1:
The movement of a plant part in response to the force of attraction exerted by the earth is called:
(a) Hydrotropism
(b) Geotropism
(c) Chemotropism
(d) Phototropism

Answer. (b) Geotropism

Question 2:
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

Question 3:
Made up of only nucleic acid and proteins are:
(a) Bacteria
(b) Chloroplast
(c) Viruses
(d) Prions

Answer: (c) Viruses

Question 4:
Which of the following is commonly known as ‘birth hormone’?
(a) Prolactin
(b) Oxytocin
(c) ADH
(d) FSH

Answer: (b) Oxytocin

Question 5:
A big tree falls in a forest, but its roots are still in contact with the soil. The branches of this fallen tree grow straight up (vertically). This happens in response to:
(a) Water and light
(b) Water and minerals
(c) Gravity and water
(d) Light and gravity

Answer. (d) Light and gravity

Question 6:
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

Question 7:
Master gland of the body is:
(a) thyroid
(b) adrenal
(c) penial
(d) pituitary

Answer: (d) pituitary

Question 8:
Which of the following gland is unpaired?
(a) Adrenal
(b) Testis
(c) Pituitary
(d) Ovary

Answer: (c) Pituitary

Question 9:
The main function of the plant hormone called abscisic acid is to:
(a) Increase the length of cells
(b) Promote cell division
(c) Inhibit growth
(d) Promote growth of stem and roots

Answer. (c) Inhibit growth

Question 10:
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

Question 11:
The mixed gland found in humans is:
(a) pancreatic gland
(b) thyroid gland
(c) pituitary gland
(d) adrenal gland

Answer: (a) pancreatic gland

Question 12:
Growth hormone is produced by
(a) Adrenal
(b) Pituitary
(c) Pancreas
(d) Thyroid

Answer: (b) Pituitary

Question 13:
The growth of tendrils in pea plants is due to the:
(a) Effect of sunlight on the tendril cells facing the sun
(b) Effect of gravity on the part of tendril hanging down towards the earth
(c) Rapid cell division and elongation in tendril cells that are away from the support
(d) Rapid cell division and elongation in tendril cells in contact with the support

Answer. (c) Rapid cell division and elongation in tendril cells that are away from the support

Question 14:
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

Question 15:
Out of the following which gland is both endocrine and exocrine in function ?
(a) Pancreas
(b) Pituitary
(c) Thymus
(d) Thyroid

Answer: (a) Pancreas

Question 16:
A patient of diabetes is not producing
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Adrenaline

Answer: (a) Insulin

Question 17:
The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:
(a) Auxin
(b) Gibberellin
(c) Abscisic acid
(d) Cytokinin

Answer. (c) Abscisic acid

Question 18:
Which is the correct sequence of the components of a reflex arc?
(a) Receptors → Muscles → Sensory neuron → Motor neuron → Spinal cord
(b) Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Answer: (d) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Question 19:
The use of iodized salt is recommended to prevent:
(a) diabetes
(b) tetany
(c) goiter
(d) hypertension

Answer: (c) goiter

Question 20:
A person consuming sea food is least likely to develop
(a) Diabetes
(b) Goiter
(c) Both A and B
(d) Heart Diseases

Answer: (b) Goiter

Question 21:
The stimulus in the process of thigmotropism is:
(a) Touch
(b) Gravity
(c) Light
(d) Chemical

Answer. (a) Touch

Question 22:
Which of the following statements are true?
(i) Sudden action in response to something in the environment is called reflex action
(ii) Sensory neurons carry signals from spinal cord to muscles
(iii) Motor neurons carry signals from receptors to spinal cord
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc

(a) (i) and (ii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (i), (ii) and (iii)

Answer: (c) (i) and (iv)

Question 23:
The correct order of sequence in a reflex arc is:
(a) Receptor → sensory neuron Motor neuron → Muscle
(b) Receptor Motor neuron → sensory neuron → Muscle
(c) sensory neuron → Receptor → Motor neuron Muscle
(d) Muscle → Receptor cells → Motor neuron → sensory neuron

Answer: (a) Receptor → sensory neuron Motor neuron → Muscle

Question 24:
Deficiency of ______cause dwarfism
(a) GH
(b) FSH
(c) LH
(d) All of these

Answer: (a) GH

Question 25:
A growing seedling is kept in a dark room. A burning lamp is placed near to it for a few days. The top part of seedling bends towards the burning candle. This is an example of:
(a) Chemotropism
(b) Hydrotropism
(c) Phototropism
(d) Geotropism

Answer. (c) Phototropism

Question 26:
Which of the following statements are true about the brain?
(i) The main thinking part of the brain is hind brain.
(ii) Centres of hearing, smell, memory, sight, etc. are located in fore brain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain.
(iv) Cerebellum does not control posture and balance of the body.

(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii) and (iii)
(d) (iii) and (iv)

Answer: (c) (ii) and (iii)

Question 27:
Non-directional plant movements are called:
(a) Nastic movements
(b) Tropic movements
(c) Cyclosis
(d) Tactic movements

Answer: (a) Nastic movements

Question 28:
_______is responsible for maintaining biological clock of body
(a) Pineal
(b) Kidney
(c) Thyroid
(d) Adrenal

Answer: (a) Pineal

Question 29:
Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called:
(a) Phototropism
(b) Thigmonasty
(c) Chemotropism
(d) Photonasty

Answer. (d) Photonasty

Question 30:
Posture and balance of the body is controlled by
(a) cerebrum
(b) cerebellum
(c) medulla
(d) pons

Answer: (b) cerebellum

Question 31:
Name the harmone which is utilized to produce seedless fruit without fertilization:
(a) ethylene
(b) gibberellins
(c) auxins
(d) none of there

Answer: (c) auxins

Question 32:
Name the hormone which controls the basal metabolic rate in animals
(a) Adrenaline
(b) Thyroxine
(c) Aldosterone
(d) Oxytocin

Answer: (c) Aldosterone

Question 33:
The number of pairs of nerves which arises from the spinal cord is:
(a) 21
(b) 31
(c) 41
(d) 51

Answer. (b) 31

Question 34:
Spinal cord originates from
(a) cerebrum
(b) medulla
(c) pons
(d) cerebellum

Answer: (b) medulla

Question 35:
If reflex action is not according in a man which part of his nervous systen is damaged:
(a) cerebrum
(b) cerebellum
(c) spinal cord
(d) medulla oblongata

Answer: (d) medulla oblongata

Question 36:
 Hormone associated with gonads
(a) Testosterone
(b) Estrogen
(c) Auxin
(d) Both (A) and (B)

Answer: (d) Both (A) and (B)

Question 37:
Iodine is necessary for the synthesis of which of the following hormone?
(a) Adrenaline
(b) Auxin
(c) Thyroxine
(d) Insulin

Answer. (c) Thyroxine

Question 38:
The movement of shoot towards light is
(a) geotropism
(b) hydrotropism
(c) chemotropism
(d) phototropism

Answer: (d) phototropism

Question 39:
Hormone insulin is produced by:
(a) pineal gland
(b) thyroid gland
(c) pancreas
(d) pituitary gland

Answer: (c) pancreas

Question 40:
A human hormone reducing blood flow to the digestive system and skin during stress is
(a) Thyroxin
(b) Adrenaline
(c) Growth hormone
(d) Insulin

Answer: (b) Adrenaline

Question 41:
Which of the following controls the involuntary actions in the body?
(a) Medulla in forebrain
(b) Medulla in hindbrain
(c) Medulla in spinal cord
(d) Medulla in midbrain

Answer. (b) Medulla in hindbrain

Question 42:
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

Question 43:
Pituitary gland is found on:
(a) ventral side of brain
(b) dorsal side of brain
(c) cerebellum
(d) cerebrum

Answer: (a) ventral side of brain

Question 44:
Which of the following control and regulate the life process?
(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

Question 45:
Which of the following is not associated with growth of plant?
(a) Auxin
(b) Gibberellins
(c) Cytokinins
(d) Abscisic acid

Answer: (d) Abscisic acid

Question 46:
Which is a plant harmone in following:
(a) Insulin
(b) Thyroxin
(c) Astrogen
(d) Cytokinin

Answer: (c) Astrogen

Question 47:
A doctor advised a person to take injection of insulin because his:
(a) Blood pressure was high
(b) Heart beat was high
(c) Blood sugar was high
(d) Thyroxine level in blood was high

Answer. (c) Blood sugar was high

Question 48:
Iodine is necessary for the synthesis of which hormone?
(a) Adrenaline
(b) Thyroxin
(c) Auxin
(d) Insulin

Answer: (b) Thyroxin

Question 49:
Name of the hormone which is secreted by testes of man are:
(a) adrenaline
(b) insulin
(c) testosterone and endosterone
(d) none of these

Answer: (c) testosterone and endosterone

Question 50:
The dramatic changes in body features associated with puberty are mainly because of the secretions of:
(a) Estrogen 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

Question 51:
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

Question 52:
Deficiency of which hormone causes diabetes ?
(a) insulin
(b) gastrin
(c) relaxin
(d) extrogen

Answer: (a) insulin

Question 53:
Electrical impulse travels in a neuron from:
(a) Dendrite → axon → axon end → cell body
(b) Cell body → dendrite → axon → axon end
(c) Dendrite → cell body → axon → axon end
(d) Axon end →axon → cell body → dendrite

Answer. (c) Dendrite → cell body → axon → axon end

Question 54:
Select the mis-matched pair:
(a) Adrenaline : Pituitary gland
(b) Testosterone : Testes
(c) Estrogen : Ovary
(d) Thyroxin : Thyroid gland

Answer: Answer: (a) Adrenaline : Pituitary gland

Question 55:
Fruit ripening is regulated by:
(a) auxin
(b) gibberellin
(c) cytokinin
(d) ethylene

Answer: (d) ethylene

Question 56:
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

Question 57:
Germination of seed is regulated by:
(a) auxin
(b) gibberellin
(c) cytokinin
(d) ethylene

Answer: (b) gibberellin

Question 58:
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

Question 59:
Phototropism is regulated by:
(a) auxin
(b) gibberellin
(c) cytokinin
(d) ethylene

Answer: (a) auxin

Question 60:
The growth of pollen tubes towards ovules is due to
(a) hydrotropism
(b) chemotropism
(c) geotropism
(d) phototropism

Answer: (b) chemotropism

Question 61:
Example of reflex action is:
(a) heart beat
(b) blood circulation
(c) sneezing
(d) all these

Answer: (c) sneezing

Question 62:
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

Question 63:
In human body, which part of the brain controls the feeling of pleasure, sex and anger:
(a) cerebrum
(b) diencephalon
(c) cerebellum
(d) medulla oblongata

Answer: (b) diencephalon

Question 64:
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

Question 65:
Part of the brain which controls respiration and heart beat is:
(a) medulla
(b) cerebellum
(c) diencephalon
(d) cerebrum

Answer: (a) medulla

Question 66:
Which of the following statements about transmission of nerve impulse is incorrect?
(a) Nerve impulse travels from dendritic end towards axonal end.
(b) At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
(c) The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
(d) A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.

Answer: (b) At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.

Question 67:
The largest part of the brain is:
(a) cerebrum
(b) cerebellum
(c) medulla
(d) mid-brain

Answer: (a) cerebrum

Question 68:
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

Question 69:
Unit of impulse transmission is:
(a) neuron
(b) nervous system
(c) brain
(d) spinal cord

Answer: (a) neuron

Question 70:
Which of the following is not an involuntary action?
(a) Vomiting
(b) Salivation
(c) Heart beat
(d) Chewing

Answer: (d) Chewing

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