Looking for authentic SEBA Class 10 Science Chapter 7 (Control and Coordination) MCQ solutions for the 2026–27 academic year? Access complete multiple-choice questions with correct options, clear explanations, and quick objective revision notes to score 100% in your HSLC board exams.
MCQ
Q1. Control and coordination in animals are controlled by:
A) Heart and lungs
B) Nervous and muscular systems
C) Only brain
D) Digestive system
Answer: B) Nervous and muscular systems
Explanation: The nervous system receives and processes information while sending signals to the muscular system to produce coordinated physical responses.
Q2. The basic structural and functional unit of the nervous system is:
A) Brain cell
B) Neuron
C) Muscle cell
D) Nucleus
Answer: B) Neuron
Explanation: Neurons are specialized nerve cells designed to transmit electrical impulses throughout the body.
Q3. Which part of the neuron receives information from other cells?
A) Axon
B) Dendrite
C) Synapse
D) Nerve ending
Answer: B) Dendrite
Explanation: Dendrites are branched extensions of the neuron cell body that collect incoming signals and convert them into electrical impulses.
Q4. The tiny gap between two adjacent neurons is called a:
A) Axon
B) Synapse
C) Cell body
D) Dendron
Answer: B) Synapse
Explanation: A synapse is the microscopic junction where electrical signals are converted into chemical neurotransmitters to pass the message to the next neuron.
Q5. What type of response is a reflex action?
A) Slow and voluntary
B) Quick and voluntary
C) Slow and automatic
D) Quick and automatic
Answer: D) Quick and automatic
Explanation: A reflex action is an immediate, rapid, and involuntary reaction to a stimulus designed to protect the body without requiring conscious thought.
Q6. In a reflex action, sensory messages are first processed by the:
A) Brain
B) Spinal cord
C) Muscles
D) Heart
Answer: B) Spinal cord
Explanation: The spinal cord acts as the primary integration center in a reflex arc to generate a rapid protective response before the signal reaches the brain.
Q7. The neural pathway through which a reflex action occurs is called a:
A) Nerve path
B) Reflex arc
C) Muscle arc
D) Brain loop
Answer: B) Reflex arc
Explanation: A reflex arc is the dedicated pathway consisting of a receptor, sensory neuron, spinal cord, motor neuron, and effector organ.
Q8. When you touch a hot object, the stimulus is first detected by:
A) Eyes
B) Skin receptors
C) Muscles
D) Brain
Answer: B) Skin receptors
Explanation: Thermoreceptors and pain receptors in the skin detect thermal stimuli and initiate electrical signals along sensory neurons.
Q9. The region of the human brain responsible for complex thinking and reasoning is the:
A) Hindbrain
B) Midbrain
C) Forebrain
D) Medulla
Answer: C) Forebrain
Explanation: The forebrain (specifically the cerebrum) is the main thinking and cognitive processing center of the brain.
Q10. Which part of the brain controls body balance, posture, and muscle coordination? A) Cerebrum
B) Cerebellum
C) Medulla
D) Midbrain
Answer: B) Cerebellum
Explanation: The cerebellum, located in the hindbrain, regulates motor control to maintain posture, balance, and smooth voluntary movements.
SEBA Class 10 Science Chapter 7 Multiple Choice Questions
Q11. Which part of the brain controls heartbeat and breathing?
A) Cerebellum
B) Medulla
C) Cerebrum
D) Pituitary
Answer: B) Medulla
Explanation: The medulla oblongata in the hindbrain contains vital centers that regulate involuntary functions such as heartbeat, blood pressure, and respiration.
Q12. The brain is protected by:
A) Skull and cerebrospinal fluid
B) Skin
C) Backbone
D) Ribs
Answer: A) Skull and cerebrospinal fluid
Explanation: The bony skull (cranium) protects the brain from external physical impact, while the surrounding cerebrospinal fluid (CSF) acts as a shock absorber.
Q13. The spinal cord is protected by the:
A) Skull
B) Vertebral column
C) Cerebellum
D) Ribs
Answer: B) Vertebral column
Explanation: The spinal cord runs through a hollow neural canal enclosed and protected by the bony segments of the vertebral column (backbone).
Q14. Which of the following is a voluntary action?
A) Breathing
B) Heartbeat
C) Walking
D) Blinking
Answer: C) Walking
Explanation: Walking is a voluntary action controlled consciously by the motor cortex of the brain, unlike involuntary actions which occur automatically.
Q15. The “touch-me-not” (Mimosa pudica) plant shows movement due to:
A) Growth
B) Water movement in cells
C) Hormones
D) Gravity
Answer: B) Water movement in cells
Explanation: Rapid changes in turgor pressure (water content) within specialized leaf base cells cause the leaves of Mimosa to fold up quickly upon touch.
Q16. Movement in plants that occurs without growth is caused by:
A) Cell division
B) Hormones
C) Change in water pressure
D) Muscle action
Answer: C) Change in water pressure
Explanation: Growth-independent (nastic) movements occur when plant cells rapidly gain or lose water, altering internal pressure (turgor) without cell elongation.
Q17. Which type of movement in plants involves growth?
A) Tropic movement
B) Reflex movement
C) Water movement
D) Folding
Answer: A) Tropic movement
Explanation: Tropic movements are directional growth responses where plant parts elongate toward or away from an environmental stimulus.
Q18. The bending of a plant stem towards light is called:
A) Geotropism
B) Phototropism
C) Chemotropism
D) Hydrotropism
Answer: B) Phototropism
Explanation: Phototropism is the directional growth movement of a plant in response to a light stimulus, mediated by the uneven distribution of auxin.
Q19. Roots growing downward into the soil is an example of positive:
A) Phototropism
B) Geotropism
C) Chemotropism
D) Hydrotropism
Answer: B) Geotropism
Explanation: Geotropism (gravitropism) is the growth response of plants to gravity; roots show positive geotropism by growing downward.
Q20. The growth of a pollen tube towards the ovule is an example of:
A) Geotropism
B) Chemotropism
C) Phototropism
D) Hydrotropism
Answer: B) Chemotropism
Explanation: Chemotropism is the growth movement of plant parts in response to chemical stimuli, such as the pollen tube growing toward chemicals secreted by the ovule.
Control and Coordination Class 10 SEBA MCQ Notes
Q21. Which plant hormone helps in bending towards light?
A) Cytokinin
B) Auxin
C) Gibberellin
D) Abscisic acid
Answer: B) Auxin
Explanation: Auxin accumulates on the shaded side of the stem, causing those cells to elongate faster and resulting in the plant bending toward the light source.
Q22. Gibberellins promote:
A) Leaf fall
B) Stem and leaf growth
C) Fruit ripening
D) Root growth
Answer: B) Stem and leaf growth
Explanation: Gibberellins are plant growth regulators that stimulate stem elongation, seed germination, and leaf expansion.
Q23. Cytokinins are responsible for:
A) Cell division
B) Inhibiting growth
C) Wilting
D) Tropism
Answer: A) Cell division
Explanation: Cytokinins promote rapid cell division (cytokinesis) and are present in high concentrations in areas of active cell division, such as fruits and seeds.
Q24. Which plant hormone causes wilting of leaves?
A) Auxin
B) Gibberellin
C) Abscisic Acid
D) Cytokinin
Answer: C) Abscisic Acid
Explanation: Abscisic Acid (ABA) acts as a growth inhibitor that induces stomatal closure, leaf wilting, and seed dormancy.
Q25. Which hormone helps in fruit ripening?
A) Auxin
B) Gibberellin
C) Cytokinin
D) Ethylene
Answer: D) Ethylene
Explanation: Ethylene is a gaseous plant hormone that promotes and regulates the ripening of fruits.
HSLC Science Chapter 7 Objective Questions
Q26. Adrenaline is called the:
A) Growth hormone
B) Emergency hormone
C) Sleep hormone
D) Relaxing hormone
Answer: B) Emergency hormone
Explanation: Adrenaline is released by the adrenal glands during high-stress or fearful situations to rapidly prepare the body to deal with emergencies.
Q27. Adrenaline prepares the body for:
A) Sleep and rest
B) Fight or flight
C) Digestion
D) Growth
Answer: B) Fight or flight
Explanation: Adrenaline increases heart rate, breathing rate, and blood flow to muscles, preparing the body to either fight a threat or flee from danger.
Q28. Which hormone regulates blood sugar level?
A) Adrenaline
B) Insulin
C) Thyroxin
D) Oestrogen
Answer: B) Insulin
Explanation: Insulin, produced by the pancreas, facilitates the uptake of glucose into body cells to maintain normal blood sugar levels.
Q29. Deficiency of iodine causes:
A) Diabetes
B) Goitre
C) Dwarfism
D) Anaemia
Answer: B) Goitre
Explanation: Iodine is required for the synthesis of thyroxin by the thyroid gland; its deficiency causes enlargement of the thyroid gland, known as goitre.
Q30. Growth hormone is secreted by the:
A) Thyroid gland
B) Pituitary gland
C) Adrenal gland
D) Pancreas
Answer: B) Pituitary gland
Explanation: The pituitary gland, located at the base of the brain, secretes growth hormone to regulate overall bodily growth and development.
Class 10 Science Chapter 7 MCQ Question Answer SEBA 2026-27
Q31. When you put sugar in your mouth, which receptors help you detect its taste?
A) Olfactory receptors
B) Gustatory receptors
C) Thermal receptors
D) Photoreceptors
Answer: B) Gustatory receptors
Explanation: Gustatory receptors located on taste buds across the tongue are specifically designed to detect chemical tastes, such as sweet, sour, salty, bitter, and umami.
Q32. When you block your nose while tasting sugar, what happens?
A) You cannot taste it at all
B) The sweetness increases
C) The taste feels less strong
D) There is no change
Answer: C) The taste feels less strong
Explanation: Olfactory receptors in the nose contribute significantly to perceiving the full flavor profile of food, so blocking airflow through the nasal cavity reduces overall flavor perception.
Q33. The reduced sense of taste when your nose is blocked shows that:
A) Taste and smell work independently
B) Taste and smell work together
C) Nose controls the tongue
D) Brain does not process taste
Answer: B) Taste and smell work together
Explanation: Flavor perception is an integrated brain response created by combining sensory inputs from both gustatory receptors (tongue) and olfactory receptors (nose).
Q34. The combination of which two senses gives us the full flavor of food?
A) Sight and taste
B) Touch and smell
C) Taste and smell
D) Hearing and taste
Answer: C) Taste and smell
Explanation: While taste buds detect basic taste categories, smell provides the complex olfactory details that together produce the experience of flavor.
Q35. In the plant experiment with bean seeds and light, the shoots bend towards light because of:
A) Water movement
B) Gravitropism
C) Phototropism
D) Hydrotropism
Answer: C) Phototropism
Explanation: Phototropism is the directional growth response of plant stems toward a light source to optimize light absorption for photosynthesis.
Q36. The roots in the same experiment grow away from light because of:
A) Geotropism
B) Chemotropism
C) Phototropism
D) Hydrotropism
Answer: A) Geotropism
Explanation: Roots display positive geotropism (growing downward in response to gravity) and negative phototropism, guiding them down into the soil.
Q37. If the flask is turned so that shoots face away from light, what happens to new growth?
A) Old parts bend back immediately
B) New shoots bend again towards light
C) Growth stops completely
D) Roots start growing upwards
Answer: B) New shoots bend again towards light
Explanation: Phototropic growth occurs in actively dividing and elongating new regions, so newly developing stem tissues will reorient and curve back toward the light.
Q38. The old parts of the shoot and root do not change direction because:
A) They cannot sense light
B) Growth occurs only in new regions
C) Hormones stop working
D) They are dead tissues
Answer: B) Growth occurs only in new regions
Explanation: Bending in plants results from differential cell elongation in growing apical meristematic regions, whereas mature regions have fixed cell structures that cannot bend.
Q39. The bending of the shoot towards light in the experiment is due to:
A) Unequal distribution of auxin
B) Equal growth on both sides
C) Lack of water
D) Presence of chlorophyll
Answer: A) Unequal distribution of auxin
Explanation: Auxin accumulates in higher concentrations on the shaded side of the stem, stimulating faster cell elongation on that side and causing the stem to curve toward light.
Q40. What do we conclude from the bean seed experiment?
A) Light has no effect on plant growth
B) Plant growth is random
C) Plant growth is directional and controlled by stimuli
D) Roots and shoots grow equally in all directions
Answer: C) Plant growth is directional and controlled by stimuli
Explanation: The experiment proves that plant growth responses are non-random, directional movements (tropisms) regulated by environmental factors like light and gravity.
SEBA Class 10 Science Chapter 7 MCQ Solutions
Q41. Which hormone controls phototropic movement in plants?
A) Gibberellin
B) Auxin
C) Cytokinin
D) Abscisic acid
Answer: B) Auxin
Explanation: Auxin is the primary plant growth hormone responsible for regulating cell elongation and driving directional phototropic responses.
Q42. Which of the following is an endocrine gland found in humans?
A) Salivary gland
B) Pituitary gland
C) Sweat gland
D) Sebaceous gland
Answer: B) Pituitary gland
Explanation: The pituitary gland is a ductless endocrine gland that secretes hormones directly into the bloodstream, unlike salivary, sweat, and sebaceous glands which are exocrine glands.
🔬 Updated MCQ Guide Notice: This page features a full collection of SEBA Class 10 Science Chapter 7 (Control and Coordination) Multiple Choice Questions (MCQs) with accurate options and step-by-step explanations, fully updated for the 2026–27 academic session in accordance with the latest revised Assam Board (SEBA) textbook.
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