Control and Coordination — Class 10 Science MCQ with Answers (2026-27)

Updated · checked against the CBSE 2026-27 syllabus

7 objective questions on Control and Coordination (Class 10 Science — Biology), every one checked against the CBSE 2026-27 syllabus. Pick an option and the correct answer is shown straight away, with your marks running at the top.

What the 2026-27 syllabus covers in Control and Coordination

Control and Coordination MCQ questions with answers

  1. Cell division in plants is promoted‌ by‌ .
    1. Auxin
    2. Abscisic acid
    3. Cytokinins
    4. Gibberellins

    Answer: c) Cytokinins

    Cytokinins promote cell division. Auxins mainly cause cell elongation, gibberellins stem growth, and abscisic acid inhibits growth.

  2. Which of these is the correct sequence of the flow of​ information​ in the re lex arc?
    1. Sensory Neurone → Receptor → Motor Neurone → Relay Neurone → Effector
    2. Receptor → Sensory Neurone → Relay Neurone → Motor Neurone → Effector
    3. Sensory Neurone → Receptor → Motor Neurone → Relay Neurone → Effector
    4. Effector → Motor Neurone → Relay Neurone → Sensory Neurone → Receptor

    Answer: b) Receptor → Sensory Neurone → Relay Neurone → Motor Neurone → Effector

    A reflex arc runs receptor → sensory neurone → relay neurone in the spinal cord → motor neurone → effector. The receptor must detect the stimulus before any neurone can carry it.

  3. The cerebellum in the brain controls voluntary actions of the body. Which‌ of​ these actions is controlled by the cerebellum?
    1. Beating of the heart
    2. Blinking of the eyes
    3. Watering of the mouth
    4. Jumping from a height

    Answer: d) Jumping from a height

    The cerebellum controls posture, balance and precision of voluntary movement — needed when landing a jump. Heartbeat, blinking and salivation are involuntary and controlled by the medulla.

  4. Which of these health conditions is caused by‌ a‌ hormonal imbalance in the body?
    1. Scurvy
    2. Typhoid
    3. Diabetes
    4. Common cold

    Answer: c) Diabetes

    Diabetes results from too little insulin, a hormone from the pancreas. Scurvy is a vitamin deficiency; typhoid and the common cold are infections.

  5. Which row describes a hormone?
    1. Chemical messenger, produced by the brain
    2. Nerve signal, produced by the brain
    3. Chemical messenger, produced by a gland
    4. Nerve signal, produced by a gland

    Answer: c) Chemical messenger, produced by a gland

    A hormone is a chemical messenger secreted by an endocrine gland and carried in the blood. Nerve signals are electrical and travel along neurones instead.

  6. Three responses to hormones: (1) growth of facial hair, (2) increased blood pressure and pulse rate, (3) widened pupils.
    Which responses are​ caused‌ by the hormone adrenaline?
    1. 1 and 2 only
    2. 1 and 3 only
    3. 2 and 3 only
    4. 1, 2 and 3

    Answer: c) 2 and 3 only

    Adrenaline prepares the body for action: it raises heart rate and blood pressure (2) and dilates the pupils (3). Facial hair growth (1) is caused by testosterone, not adrenaline.

  7. Which statement explains why the shoot of a plant bends when exposed​ to‌ light from one side?
    1. Diffusion of auxin into the shaded cells causes cell division of those cells
    2. Diffusion of auxin out of the shaded cells causes cell division of those cells
    3. Diffusion of auxin into the shaded cells causes elongation of those cells
    4. Diffusion of auxin out of the shaded cells causes elongation of those cells

    Answer: c) Diffusion of auxin into the shaded cells causes elongation of those cells

    Auxin moves away from the lit side to the shaded side, where it makes cells elongate more. The shaded side grows longer, so the shoot bends towards the light.

Frequently asked questions

How many Control and Coordination MCQs are there for Class 10 Science?

This page has 7 multiple choice questions on Control and Coordination, each with the correct answer and a worked explanation. Every question has been checked against the CBSE 2026-27 syllabus.

What does the 2026-27 syllabus cover in Control and Coordination?

Tropic movements in plants; introduction of plant hormones; Control and coordination in animals: nervous system; Voluntary, involuntary and reflex action; Chemical coordination — animal hormones. Every question on this page tests one of these.

How many marks is each Control and Coordination MCQ worth?

Each objective question carries 1 mark in the CBSE Class 10 Science paper. The practice set on this page keeps a running total as you answer, so you can see your score out of 7.

Control and Coordination — chapter notes

Plants respond to stimuli by directional growth. Auxin moves away from the lit side of a shoot and makes the shaded cells elongate more, so the shoot bends towards the light — that mechanism is worth learning in full because it is asked often. Know the four plant hormones and what each does: auxin for elongation, cytokinin for cell division, gibberellin for stem growth, abscisic acid for inhibition and wilting. In animals, coordination is both electrical and chemical.

Trace the reflex arc in order — receptor, sensory neurone, relay neurone in the spinal cord, motor neurone, effector — and be clear why reflexes bypass the brain. Distinguish voluntary, involuntary and reflex actions with examples. For hormones, learn the gland, the hormone and its effect as a set, since questions usually give one and ask for the others.