Chapter 26: Life Processes: Control and Coordination – Important MCQs
- Which part of the human brain controls voluntary actions?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Pons
✔️ Answer: A. Cerebrum - Which hormone is responsible for growth in plants towards light?
A. Auxin
B. Gibberellin
C. Cytokinin
D. Abscisic acid
✔️ Answer: A. Auxin - Which of the following is not a part of the human nervous system?
A. Brain
B. Spinal cord
C. Kidney
D. Nerves
✔️ Answer: C. Kidney - What is the structural and functional unit of the nervous system?
A. Neuron
B. Nephron
C. Alveoli
D. Axon
✔️ Answer: A. Neuron - The chemical substances which help in transmission of nerve impulses are:
A. Enzymes
B. Hormones
C. Neurotransmitters
D. Vitamins
✔️ Answer: C. Neurotransmitters - Which part of the brain maintains posture and balance of the body?
A. Cerebrum
B. Cerebellum
C. Medulla
D. Pons
✔️ Answer: B. Cerebellum - The plant hormone responsible for the ripening of fruits is:
A. Auxin
B. Ethylene
C. Gibberellin
D. Cytokinin
✔️ Answer: B. Ethylene - Which gland is known as the ‘master gland’ in humans?
A. Thyroid gland
B. Pituitary gland
C. Adrenal gland
D. Pancreas
✔️ Answer: B. Pituitary gland - Movement in plants towards gravity is known as:
A. Phototropism
B. Geotropism
C. Hydrotropism
D. Chemotropism
✔️ Answer: B. Geotropism - Reflex action is controlled by:
A. Brain
B. Spinal cord
C. Cerebellum
D. Medulla
✔️ Answer: B. Spinal cord
