Multiple Choice Questions (MCQs) for Class 10 Science: Chapter 06 Control and Coordination
Review structured MCQ sets for Class 10 Science Chapter 06 Control and Coordination. Built according to official CBSE guidelines, these downloadable questions support daily revision and core concept reinforcement.
Practice Chapter 06 Control and Coordination MCQs for Class 10 Science
View or download the dedicated Chapter 06 Control and Coordination MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Science evaluations.
Here are 37 multiple choice questions from the Class 10 Biology chapter Control and Coordination, each followed by the answer, an explanation and a Teacher's Note. The set checks how well you can tell nervous control from chemical control, name the right gland for each hormone, and link phototropism, geotropism, chemotropism and nastic movements to the stimulus involved.
Multiple Choice Questions
(a) brain → spinal cord → muscles
(b) receptor → spinal cord → muscles
(c) muscle → receptor → brain
(d) muscles → spinal cord → receptor
Show Answer & Explanation
Answer: (b) receptor → spinal cord → muscles
Explanation:
1. A reflex arc starts from a receptor, passes through the spinal cord and ends at the muscle (effector). The brain is not involved.
Teacher's Note:
1. Reflex arc: receptor, sensory neuron, spinal cord, motor neuron, effector.
2. The brain is bypassed.
(a) phototropism
(b) geotropism
(c) chemotropism
(d) hydrotropism
Show Answer & Explanation
Answer: (a) phototropism
Explanation:
1. The sunflower turns in response to the direction of light, which is phototropism.
Teacher's Note:
1. Photo means light.
2. Do not confuse it with geotropism which is about gravity.
(a) Cerebellum – Language comprehension
(b) Corpus callosum – Communication between the left and right cerebral cortices
(c) Cerebrum – Calculation and contemplation
(d) Medulla oblongata – Homeostatic control
Show Answer & Explanation
Answer: (a) Cerebellum – Language comprehension
Explanation:
1. The cerebellum controls posture and balance and is not concerned with language.
2. Language and thinking are functions of the cerebrum.
Teacher's Note:
1. Cerebellum: balance and precise movements.
2. Cerebrum: thinking, language, memory.
(a) Forebrain
(b) Midbrain
(c) Hindbrain
(d) Spinal cord
Show Answer & Explanation
Answer: (a) Forebrain
Explanation:
1. The feeling of hunger is controlled by the hypothalamus, which is a part of the forebrain.
Teacher's Note:
1. Source key was mid brain; the hunger centre lies in the forebrain.
2. The hypothalamus also controls body temperature.
(a) Nervous and Skeletal
(b) Muscular and Skeletal
(c) Muscular and Transport
(d) Nervous and Muscular
Show Answer & Explanation
Answer: (d) Nervous and Muscular
Explanation:
1. Nervous tissue receives and passes on information and muscular tissue carries out the response, so they provide control and coordination.
Teacher's Note:
1. Nerve tissue controls and muscle tissue responds.
2. Skeletal and transport tissues do not coordinate.
(a) Abscisic acid
(b) Gibberellin
(c) Cytokinin
(d) Auxin
Show Answer & Explanation
Answer: (a) Abscisic acid
Explanation:
1. Abscisic acid is the growth-inhibiting stress hormone that causes wilting of leaves.
Teacher's Note:
1. Abscisic acid closes stomata.
2. It promotes leaf fall and dormancy.
(I) Instantly jumping is a quick reflex action.
(II) Walking away is a slow voluntary action.
(III) Instantly jumping is controlled by brain.
(IV) Walking away is controlled by brain as well as spinal cord.
(a) (I) and (II)
(b) (II) and (IV)
(c) (II), (III) and (IV)
(d) (I), (III) and (IV)
Show Answer & Explanation
Answer: (a) (I) and (II)
Explanation:
1. Jumping back at once is a quick reflex action controlled by the spinal cord, and walking away is a slower voluntary action controlled by the brain.
2. So statements (I) and (II) are correct and (III) is wrong.
Teacher's Note:
1. Reflex = fast, spinal cord.
2. Voluntary = slower, brain.
(a) Midbrain
(b) Olfactory lobes
(c) Cerebellum
(d) Forebrain
Show Answer & Explanation
Answer: (b) Olfactory lobes
Explanation:
1. The olfactory lobes in the forebrain are concerned with the sense of smell.
Teacher's Note:
1. Olfactory = related to smell.
2. Olfactory lobes are poorly developed in humans but still serve this purpose.
(a) Spinal cord is a part of central nervous system.
(b) Nerves are continuous fibres
(c) Reflexes are not controlled by nerves
(d) None of the above
Show Answer & Explanation
Answer: (a) Spinal cord is a part of central nervous system.
Explanation:
1. The central nervous system consists of the brain and the spinal cord, so (a) is right.
Teacher's Note:
1. Reflexes are controlled by nerves and the spinal cord.
2. CNS = brain + spinal cord.
(a) skin
(b) spinal cord
(c) muscles
(d) brain
Show Answer & Explanation
Answer: (c) muscles
Explanation:
1. Effectors are the organs that respond.
2. The arm muscles contract to pull the hand away.
Teacher's Note:
1. Skin is the receptor.
2. Muscles and glands are the effectors.
(a) Adrenaline
(b) Thyroxine
(c) Aldosterone
(d) Oxytocin
Show Answer & Explanation
Answer: (b) Thyroxine
Explanation:
1. Thyroxine from the thyroid gland controls the basal metabolic rate.
Teacher's Note:
1. Thyroxine regulates metabolism of carbohydrates, proteins and fats.
2. It needs iodine.
(a) Darkness
(b) Wind
(c) Non-directional stimuli
(d) Directional stimuli
Show Answer & Explanation
Answer: (c) Non-directional stimuli
Explanation:
1. Tropic movements are directional responses to a stimulus, whereas nastic movements do not depend on the direction of the stimulus.
Teacher's Note:
1. Nastic = non-directional; tropic = directional.
2. Example of nastic: touch-me-not leaves.
(a) lymphatic gland
(b) Salivary gland
(c) Pancreas
(d) Pituitary gland
Show Answer & Explanation
Answer: (c) Pancreas
Explanation:
1. Insulin is secreted by the beta cells of the islets of Langerhans in the pancreas.
Teacher's Note:
1. Insulin lowers blood sugar.
2. Salivary glands make saliva, which is not a hormone.
(a) Auxin and Cytokinin
(b) Gibberelin and Ethylene
(c) Abscisic acid and Auxin
(d) Cytokinin and Ethylene
Show Answer & Explanation
Answer: (a) Auxin and Cytokinin
Explanation:
1. Auxin promotes elongation and cytokinin promotes cell division, so both promote growth.
2. Abscisic acid inhibits growth.
Teacher's Note:
1. Growth promoters: auxin, gibberellin, cytokinin.
2. Growth inhibitor: abscisic acid.
(a) Diabetes
(b) Goitre
(c) Both (A) and (B)
(d) Heart Diseases
Show Answer & Explanation
Answer: (b) Goitre
Explanation:
1. Sea food is rich in iodine, which is needed to make thyroxine.
2. So such a person is least likely to develop goitre.
Teacher's Note:
1. Goitre is caused by iodine deficiency.
2. Iodised salt serves the same purpose.
Statement-II: Tropic movements are slow in action.
(a) Both Statement-I and Statement-II are correct.
(b) Both Statement-I and Statement-II are incorrect.
(c) Statement-I is correct and Statement-II is incorrect.
(d) Statement-I is incorrect and Statement-II is correct.
Show Answer & Explanation
Answer: (a) Both Statement-I and Statement-II are correct.
Explanation:
1. Tropic movements are growth movements, so they are permanent (irreversible) and slow.
2. Both statements are correct.
Teacher's Note:
1. Nastic movements are quick and reversible.
2. Tropic movements depend on growth.
Column I: (A) Auxin, (B) Gibberellin, (C) Cytokinin, (D) Dormin
Column II: (p) GA3, (q) IAA, (r) ABA, (s) Zeatin
(a) A-q, B-s, C-r, D-p
(b) A-q, B-p, C-s, D-r
(c) A-r, B-s, C-p, D-q
(d) A-r, B-q, C-s, D-p
Show Answer & Explanation
Answer: (b) A-q, B-p, C-s, D-r
Explanation:
1. Auxin is IAA (indole acetic acid), gibberellin is GA3, cytokinin is zeatin and dormin is abscisic acid (ABA).
2. So A-q, B-p, C-s, D-r.
Teacher's Note:
1. Dormin is another name of abscisic acid.
2. Learn the chemical name along with the hormone name.
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Adrenaline
Show Answer & Explanation
Answer: (a) Insulin
Explanation:
1. Diabetes results from a deficiency of insulin, which is made by the pancreas.
Teacher's Note:
1. Insulin controls blood sugar.
2. Thyroxin deficiency gives goitre.
(a) He will lose his memory power.
(b) He will not be able to swallow food properly.
(c) He will be unable to coordinate and stand properly.
(d) He will lose his power of vision and hearing.
Show Answer & Explanation
Answer: (c) He will be unable to coordinate and stand properly.
Explanation:
1. The cerebellum controls balance, posture and coordination of voluntary muscles.
2. If it is damaged, the person cannot coordinate movements or stand properly.
Teacher's Note:
1. The cerebellum is in the hind brain.
2. Memory is a function of the cerebrum.
(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
Show Answer & Explanation
Answer: (c) rapid cell divisions in tendrillar cells that are away from the support
Explanation:
1. Auxin collects on the side of the tendril away from the support.
2. Cells there divide and grow faster, so the tendril coils around the support.
Teacher's Note:
1. This is a response to touch, called thigmotropism.
2. The side in contact with the support grows less.
(a) Impulse
(b) Cytoplasmic extension
(c) Muscle parts
(d) All of the above
Show Answer & Explanation
Answer: (b) Cytoplasmic extension
Explanation:
1. The axon is a long cytoplasmic extension of the nerve cell body that conducts impulses away from it.
Teacher's Note:
1. A neuron has dendrites, a cell body and one axon.
2. The axon is not the impulse itself.
(a) Writing
(b) Talking
(c) Walking
(d) Breathing
Show Answer & Explanation
Answer: (d) Breathing
Explanation:
1. Writing, talking and walking are done with our will.
2. Breathing goes on automatically under the control of the medulla.
Teacher's Note:
1. Breathing is mainly involuntary.
2. Voluntary actions are controlled by the fore brain.
(a) Pancreas
(b) Liver
(c) Adrenal
(d) Kidney
Show Answer & Explanation
Answer: (a) Pancreas
Explanation:
1. The pancreas secretes hormones into blood (endocrine) and pancreatic juice through a duct (exocrine).
Teacher's Note:
1. Gonads also have a dual role.
2. The pancreas is a mixed gland.
Statement-II: Myelin sheath improves speed of conduction.
(a) Both Statement-I and Statement-II are correct.
(b) Both Statement-I and Statement-II are incorrect.
(c) Statement-I is correct and Statement-II is incorrect.
(d) Statement-I is incorrect and Statement-II is correct.
Show Answer & Explanation
Answer: (d) Statement-I is incorrect and Statement-II is correct.
Explanation:
1. Not all neurons have a myelin sheath, so Statement-I is incorrect.
2. Myelin sheath speeds up the conduction of impulses, so Statement-II is correct.
Teacher's Note:
1. Myelinated fibres conduct faster.
2. Some neurons are non-myelinated.
(a) Pituitary gland
(b) Thyroid gland
(c) Pancreas
(d) Testes
Show Answer & Explanation
Answer: (a) Pituitary gland
Explanation:
1. Growth hormone is secreted by the pituitary gland.
Teacher's Note:
1. The pituitary is the master gland.
2. Its deficiency causes dwarfism.
(a) Testosterone
(b) Estrogen
(c) Auxin
(d) Both (A) and (B)
Show Answer & Explanation
Answer: (d) Both (A) and (B)
Explanation:
1. Testes (male gonads) secrete testosterone and ovaries (female gonads) secrete oestrogen.
2. Auxin is a plant hormone.
Teacher's Note:
1. Gonads are the testes and ovaries.
2. Auxin does not occur in animals.
(i) The main thinking part of 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)
Show Answer & Explanation
Answer: (c) (ii) and (iii)
Explanation:
1. The fore brain is the main thinking part and has the centres of hearing, smell, memory and sight, so (ii) is true and (i) is false.
2. The medulla controls involuntary actions, so (iii) is true.
3. The cerebellum does control posture and balance, so (iv) is false.
Teacher's Note:
1. Fore brain thinks, mid brain relays, hind brain keeps the body running and balanced.
2. Check each statement separately before choosing the pair.
(a) there is no change in taste of sugar.
(b) we do not get the taste of sugar.
(c) there is a change in the taste of sugar.
(d) sugar tastes salty.
Show Answer & Explanation
Answer: (c) there is a change in the taste of sugar.
Explanation:
1. Smell and taste are closely linked.
2. Blocking the nose stops smell from reaching the olfactory receptors, so the taste appears changed.
Teacher's Note:
1. Food taste depends on smell as well.
2. This is why food tastes bland during a cold.
(a) Gustatory receptors → Dendritic tip of a nerve cell → Axon → Nerve ending → Release of signal → Dendritic tip of other nerve cell.
(b) Olfactory receptors → Dendritic tip of a nerve cell → Axon → Nerve ending → Release of signal → Dendritic tip of other nerve cell.
(c) Photo receptors → Dendritic tip of a nerve cell → Axon → Nerve ending → Release of signal → Dendritic tip of other nerve cell.
(d) Phono receptors → Dendritic tip of a nerve cell → Axon → Nerve ending → Release of signal → Dendritic tip of other nerve cell.
Show Answer & Explanation
Answer: (b) Olfactory receptors → Dendritic tip of a nerve cell → Axon → Nerve ending → Release of signal → Dendritic tip of other nerve cell.
Explanation:
1. Smell is detected by olfactory receptors in the nose.
2. The impulse travels from the dendritic tip through the axon to the nerve ending, and is passed on across the synapse.
Teacher's Note:
1. Match the receptor with the sense.
2. The path inside neurons is always the same.
(a) thinking
(b) regulating the heart beat
(c) balancing the body
(d) all of the above
Show Answer & Explanation
Answer: (d) all of the above
Explanation:
1. The cerebrum is for thinking, the medulla regulates heartbeat and the cerebellum balances the body.
2. So all the three are functions of the brain.
Teacher's Note:
1. Different parts of the brain have different functions.
2. When all statements are correct, choose the option 'all of the above'.
(a) Renin
(b) Auxin
(c) Gibberellin
(d) Cytokinin
Show Answer & Explanation
Answer: (b) Auxin
Explanation:
1. Auxin collects on the shaded side of the shoot and makes cells there elongate.
2. This bends the shoot towards light.
Teacher's Note:
1. Auxin helps the cells to grow longer.
2. Renin is an enzyme, not a plant hormone.
(a) Liver
(b) Pancreas
(c) Spleen
(d) Gall bladder
Show Answer & Explanation
Answer: (b) Pancreas
Explanation:
1. The pancreas secretes insulin and glucagon, which regulate blood glucose.
Teacher's Note:
1. Insulin lowers sugar; glucagon raises it.
2. Beta cells make insulin.
Assertion (A): Medulla oblongata causes reflex actions like vomiting, coughing and sneezing.
Reason (R): It has many nerve cells which control autonomic reflexes.
(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.
Show Answer & Explanation
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
1. The medulla controls involuntary reflexes such as vomiting, coughing and sneezing.
2. It does so because it has nerve centres that control these autonomic reflexes.
Teacher's Note:
1. The medulla is a part of the hind brain.
2. It also controls heartbeat and breathing.
Assertion (A): Our body maintains blood sugar level.
Reason (R): Pancreas secretes insulin which helps to regulate blood sugar levels in the body.
(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.
Show Answer & Explanation
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
1. The pancreas secretes insulin when blood sugar rises, which lowers it.
2. This is how the body maintains its blood sugar level.
Teacher's Note:
1. Feedback mechanism controls insulin release.
2. Diabetes results when insulin is deficient.
Assertion (A): Damage to the medulla oblongata causes death.
Reason (R): Medulla oblongata controls involuntary functions of the body.
(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.
Show Answer & Explanation
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
1. The medulla controls involuntary functions like breathing and heartbeat.
2. Damage stops these functions and can cause death, so R explains A.
Teacher's Note:
1. The medulla controls vital activities.
2. It lies in the hind brain.
Assertion (A): Cerebrum controls the body posture.
Reason (R): Cerebrum is not connected to internal ear.
(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.
Show Answer & Explanation
Answer: (d) A is false, but R is true.
Explanation:
1. Posture is controlled by the cerebellum, so A is false.
2. The cerebrum has no direct connection with the internal ear, so R is true.
Teacher's Note:
1. Cerebellum = balance and posture.
2. The cerebrum is for thinking and memory.
Assertion (A): Phototropism is caused by auxin.
Reason (R): When light is coming from one side of the plant, auxin diffuses towards the shady side of the shoot.
(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.
Show Answer & Explanation
Answer: (a) Both A and R are true, and R is the correct explanation of A.
Explanation:
1. Auxin collects on the shady side and makes those cells grow longer, so the shoot bends towards light.
2. R correctly explains A.
Teacher's Note:
1. Auxin moves away from light.
2. The shaded side grows faster.
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Multiple Choice Questions (MCQs) for Class 10 Science Chapter 06 Control and Coordination
Download Multiple Choice Questions: Chapter 06 Control and Coordination (Class 10 Science)
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FAQs
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