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Control and Coordination — Class 10 CBSE Science MCQs with Solutions
Free Class 10 CBSE Science Control and Coordination MCQs with step-by-step solutions. Practise online on Prepizo — no login needed.
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Sample questions with solutions
Q1 — easy
Structural and functional unit of human nervous system is:
A. Nephron
B. Neuron (Nerve cell) ✓ Correct
C. Brain
D. Spinal cord
Solution: Neurons transmit electrochemical nerve impulses.
Q2 — easy
Gaps between two adjacent neurons where chemical neurotransmitters cross are called:
A. Axons
B. Synapses ✓ Correct
C. Dendrites
D. Myelin sheaths
Solution: Synapses are junctional gaps between neurons.
Q3 — easy
Sudden involuntary automatic response to an environmental stimulus controlled by spinal cord is a:
A. Voluntary action
B. Reflex action ✓ Correct
C. Tropic movement
D. Hormonal action
Solution: Reflex arcs bypass conscious brain processing for quick response.
Q4 — easy
Main thinking, reasoning, memory, and voluntary control center of human brain is:
A. Cerebellum
B. Cerebrum ✓ Correct
C. Medulla oblongata
D. Pons
Solution: Cerebrum is the largest part of forebrain handling higher cognitive functions.
Q5 — easy
Part of hindbrain responsible for maintaining posture, body balance, and precision of voluntary movements is:
A. Cerebrum
B. Cerebellum ✓ Correct
C. Hypothalamus
D. Medulla
Solution: Cerebellum coordinates motor balance and posture.
Q6 — easy
Involuntary actions like blood pressure, salivation, and vomiting are controlled by hindbrain part:
A. Cerebellum
B. Medulla oblongata ✓ Correct
C. Cerebrum
D. Pons
Solution: Medulla oblongata regulates autonomic vital functions.
Q7 — easy
Directional growth movement of plant shoot bending toward light is:
A. Geotropism
B. Phototropism ✓ Correct
C. Hydrotropism
D. Thigmotropism
Solution: Phototropism is growth response to directional light.
Q8 — easy
Growth movement of plant roots downward in response to gravity is:
A. Phototropism
B. Positive Geotropism ✓ Correct
C. Chemotropism
D. Hydrotropism
Solution: Roots exhibit positive geotropism.
Q9 — easy
Growth of pollen tube toward ovule inside flower carpel is triggered by chemical stimulus, known as:
A. Hydrotropism
B. Chemotropism ✓ Correct
C. Phototropism
D. Geotropism
Solution: Chemotropism guides pollen tube growth.
Q10 — easy
Plant hormone (phytohormone) synthesized at shoot tips that promotes cell elongation and phototropic bending is:
A. Cytokinin
B. Auxin ✓ Correct
C. Abscisic acid
D. Ethylene
Solution: Auxin accumulates on shaded side causing cell elongation.
Q11 — easy
Plant hormone that promotes rapid cell division and is abundant in fruits/seeds is:
A. Auxin
B. Cytokinin ✓ Correct
C. Gibberellin
D. Abscisic acid
Solution: Cytokinins stimulate cell division.
Q12 — easy
Plant growth-inhibiting hormone that causes wilting of leaves and stomatal closure is:
A. Auxin
B. Abscisic acid (ABA) ✓ Correct
C. Gibberellin
D. Cytokinin
Solution: ABA acts as a stress hormone inhibiting growth.
Q13 — easy
Hormone secreted by thyroid gland regulating carbohydrate, protein, and fat metabolism is:
A. Insulin
B. Thyroxine ✓ Correct
C. Adrenaline
D. Growth hormone
Solution: Thyroxine controls basal metabolic rate.
Q14 — easy
Hormone secreted by pancreas that lowers blood glucose level is:
A. Glucagon
B. Insulin ✓ Correct
C. Adrenaline
D. Thyroxine
Solution: Insulin promotes cellular glucose uptake.
Q15 — easy
'Emergency hormone' secreted during stress/fear by adrenal glands to prepare body for fight or flight is:
A. Thyroxine
B. Adrenaline ✓ Correct
C. Testosterone
D. Estrogen
Solution: Adrenaline increases heart rate and blood pressure in emergencies.