Control and Coordination — Class 10 MCQs with Answers
Class 10 CBSE Science (Biology) · Chapter 6
90 practice questions · 30 Easy · 30 Medium · 30 Hard · Updated
Practise the most important Class 10 CBSE Science (Biology) questions from Chapter 6, "Control and Coordination". You get 9 timed quizzes made from 90 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Easy, 30 Medium and 30 Hard. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE Board exams and the JEE & NEET foundation years apart.
To score well in "Control and Coordination", focus on clear concepts in physics, chemistry and biology basics. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Control and Coordination, then move to Medium and Hard to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 10 Science (Biology) mastery score. 14 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Key concepts: Control and Coordination (Class 10 Science (Biology))
Animals coordinate through a fast electrical nervous system and a slower chemical hormonal one, while plants coordinate entirely by chemicals and growth movements. This chapter covers the neuron, the reflex arc, the brain, plant hormones and the major endocrine glands.
- Stimulus and response
- A stimulus is a change in the environment that an organism detects; the response is the resulting reaction.
- Neuron
- The structural and functional unit of the nervous system, made of dendrites, cell body and axon, carrying impulses in one direction.
- Synapse
- The tiny gap between two neurons across which a chemical transmitter carries the impulse, ensuring one-way flow.
- Reflex action
- A rapid, automatic response to a stimulus that does not involve conscious thought, such as pulling a hand from a hot object.
Control and Coordination — important questions & MCQs with answers (Class 10 Science (Biology))
14 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 76 are timed and scored when you sign in.
- Q1Easy
The structural and functional unit of the nervous system is:
A.NephronB.HormoneC.Neuron✓ CorrectD.AxonAnswer: C. Neuron
Explanation: A neuron is the structural and functional unit of the nervous system, built to receive and transmit nerve impulses; a nephron is the analogous functional unit of the kidney, not the nervous system.
- Q2Easy
Insulin is secreted by:
A.Pancreas✓ CorrectB.LiverC.ThyroidD.PituitaryAnswer: A. Pancreas
Explanation: Insulin is secreted by the β-cells in the pancreas and lowers blood glucose; the thyroid instead secretes thyroxine, a common mix-up between these two glands.
- Q3Easy
Functional unit of the nervous system is:
A.NephronB.Neuron✓ CorrectC.CellD.AxonAnswer: B. Neuron
Explanation: The neuron is the specific functional unit of the nervous system; though a neuron is technically a cell, 'cell' alone is too generic — biology exams expect the nervous-system-specific term neuron.
- Q4Easy
Centre for thinking, intelligence and memory is:
A.Cerebrum✓ CorrectB.CerebellumC.MedullaD.PonsAnswer: A. Cerebrum
Explanation: The cerebrum, the largest part of the forebrain, is the seat of thinking, intelligence, memory and voluntary action — the cerebellum instead handles balance and coordination, not thought.
- Q5Easy
The directional growth of a plant in response to a stimulus is called:
A.PhotosynthesisB.ReflexC.TranslocationD.Tropism✓ CorrectAnswer: D. Tropism
Explanation: Tropism is the directional growth movement of a plant part toward or away from a stimulus such as light, gravity or touch, unlike nastic movements, which are non-directional.
- Q6Easy
The pathway taken by nerve impulses in a reflex action is called a:
A.Synaptic loopB.Nerve cordC.Reflex angleD.Reflex arc✓ CorrectAnswer: D. Reflex arc
Explanation: The pathway of nerve impulses in a reflex action is commonly called a reflex arc.
- Q7Medium
A knee-jerk reflex is controlled by the:
A.Spinal cord✓ CorrectB.CerebellumC.CerebrumD.MedullaAnswer: A. Spinal cord
Explanation: A reflex arc like the knee-jerk is wired through the spinal cord, letting the response fire before the signal even reaches the brain for conscious perception — faster than a cerebrum-controlled voluntary movement.
- Q8Medium
Thyroxine deficiency causes:
A.DiabetesB.AsthmaC.Goitre✓ CorrectD.AnaemiaAnswer: C. Goitre
Explanation: Low thyroxine, often from iodine deficiency, makes the pituitary keep releasing TSH to stimulate the thyroid, so the gland enlarges — this swelling is goitre, not diabetes, which involves insulin instead.
- Q9Medium
At a synapse, the signal is transmitted by:
A.Mechanical pressureB.Direct electrical contactC.HormonesD.Release of neurotransmitter (chemical) by the presynaptic neuron✓ CorrectAnswer: D. Release of neurotransmitter (chemical) by the presynaptic neuron
Explanation: At a synapse the arriving impulse triggers the presynaptic neuron to release neurotransmitter chemicals into the gap, which bind receptors on the next neuron — there is no direct electrical contact between the cells.
- Q10Medium
Brain is protected by:
A.Three membranes (meninges) and cranial skull✓ CorrectB.Bone onlyC.Membranes onlyD.Spinal cordAnswer: A. Three membranes (meninges) and cranial skull
Explanation: The brain sits inside the bony cranium and is further cushioned by three protective membranes, the meninges, with cerebrospinal fluid between them — bone or membranes alone would leave it under-protected.
- Q11Medium
Roots grow downward in response to gravity. This is:
A.Negative geotropismB.Positive geotropism✓ CorrectC.PhototropismD.HydrotropismAnswer: B. Positive geotropism
Explanation: Root growth toward the pull of gravity is positive geotropism; a shoot instead grows away from gravity, called negative geotropism, so the two organs show opposite geotropic responses.
- Q12Hard
Gap between two neurons is called:
A.AxonB.Synapse✓ CorrectC.DendriteD.NodeAnswer: B. Synapse
Explanation: The synapse is the junction between two neurons where an arriving impulse triggers release of neurotransmitters that diffuse across the gap — unlike the axon or dendrite, which are parts of a single neuron.
- Q13Hard
Movement of a plant towards light is:
A.GeotropismB.ThigmotropismC.HydrotropismD.Phototropism✓ CorrectAnswer: D. Phototropism
Explanation: Phototropism is the directional growth of a shoot toward light, driven by auxin accumulating on the shaded side and elongating those cells more — distinct from geotropism (gravity) or hydrotropism (water).
- Q14Hard
Difference between voluntary and involuntary actions:
A.Voluntary requires no thoughtB.Both controlled by cerebellumC.Both involuntaryD.Voluntary are controlled by cerebrum; involuntary by medulla or spinal cord✓ CorrectAnswer: D. Voluntary are controlled by cerebrum; involuntary by medulla or spinal cord
Explanation: Voluntary actions like walking are consciously initiated by the cerebrum, while involuntary actions like heartbeat or breathing run automatically under the medulla or spinal cord, without needing conscious thought.
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Start this chapter free →Control and Coordination — FAQs
What are the key concepts in Class 10 Science (Biology) Control and Coordination?+
Animals coordinate through a fast electrical nervous system and a slower chemical hormonal one, while plants coordinate entirely by chemicals and growth movements. This chapter covers the neuron, the reflex arc, the brain, plant hormones and the major endocrine glands. Key ideas include Stimulus and response, Neuron, Synapse, Reflex action.
What does Class 10 Science (Biology) Chapter 6 (Control and Coordination) cover on XamBaaz?+
It has 90 NCERT-based MCQs on "Control and Coordination": 30 Easy, 30 Medium and 30 Hard. Together they make 9 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams and the JEE & NEET foundation years.
Are these "Control and Coordination" questions free to practise?+
Yes. Sign in with Google to practise "Control and Coordination" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Control and Coordination" for the exam?+
Start with the Easy quiz to check your basics, then try Medium and Hard to practise applying them. There are 9 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Control and Coordination" MCQs available with answers?+
Yes. 14 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Control and Coordination" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Control and Coordination (Class 10 Science (Biology))?+
The questions that matter most test Stimulus and response, Neuron, Synapse, Reflex action. This page shows 14 solved important MCQs with answers and explanations; all 90 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Control and Coordination?+
Yes — Class 10 Science (Biology) Control and Coordination has timed online quizzes at Easy, Medium and Hard levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.