Control and Coordination — Class 10 MCQs with Answers
Class 10 CBSE Science (Biology) · Chapter 6
115 practice questions · 33 Easy · 42 Medium · 40 Hard · Updated
Jump to the 6 solved questions
Practise the most important Class 10 CBSE Science (Biology) questions from Chapter 6, "Control and Coordination". You get 11 timed quizzes made from 115 NCERT-based MCQs, with answers and explanations. The questions are split into 33 Easy, 42 Medium and 40 Hard. Warm up on the basics, then move on to the exam-level questions that top scorers in CBSE Board exams and the JEE & NEET foundation years get right.
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 helps you stay accurate when time is short, just 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. Try the 6 sample questions below: tap an option to see the answer and a worked explanation. Sign in free to start practising.
Control and Coordination — important questions & MCQs with answers (Class 10 Science (Biology))
6 solved questions from this chapter's difficulty levels, each with its answer and explanation. Tap an option to check yourself.
0 of 6 answered
- Q1 of 6Easy
The structural and functional unit of the nervous system is:
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Answer: 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.
- Q2 of 6Easy
Insulin is secreted by:
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Answer: 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.
- Q3 of 6Medium
At a synapse, the signal is transmitted by:
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Answer: Chemicals released by the first 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.
- Q4 of 6Medium
Assertion (A): A plant shoot bends towards light coming from one side. Reason (R): Auxin diffuses towards the shady side of the shoot and makes the cells there grow longer.
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Answer: Both A and R are true and R is the correct explanation of A
Explanation: Both are true. Cells on the shady side grow longer than those on the lit side, so the shoot bends towards light.
- Q5 of 6Hard
Why does a plant bend toward light?
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Answer: Auxin accumulates on the shaded side
Explanation: When light comes from one side, auxin migrates to and accumulates on the shaded side of the shoot, making those cells elongate more than the lit side — this unequal growth bends the tip toward the light.
- Q6 of 6Hard
Assertion (A): When the blood sugar level falls, the pancreas secretes more insulin. Reason (R): The timing and amount of hormone released are regulated by feedback mechanisms.
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Answer: A is false but R is true
Explanation: A is false: when blood sugar falls, insulin secretion is reduced; more insulin is made when blood sugar rises. R is true.
Control and Coordination notes: key concepts (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.
- Reflex arc
- The path of a reflex — receptor, sensory neuron, spinal cord, motor neuron, effector — completed in the spinal cord for speed.
- Central and peripheral nervous system
- The brain and spinal cord form the central system; the nerves branching from them form the peripheral system.
- Parts of the brain
- The cerebrum governs thinking and voluntary action, the cerebellum posture and balance, and the medulla involuntary actions such as heartbeat.
- Protection of the brain
- The brain sits in a bony skull, cushioned by cerebrospinal fluid within membranes that absorb shocks.
- Plant movements: tropic and nastic
- Tropic movements are directional and depend on the direction of the stimulus; nastic movements, such as the touch-me-not folding, do not.
- Phototropism and geotropism
- Growth towards light, and growth of roots towards gravity while shoots grow away from it.
- Plant hormones
- Auxin promotes cell elongation, gibberellin stem growth, cytokinin cell division, and abscisic acid inhibits growth and causes wilting.
- Endocrine glands and hormones
- Ductless glands secreting hormones directly into the blood, which act slowly on distant target organs.
- Major hormones
- Adrenaline for emergencies, insulin for blood sugar, thyroxine for metabolism and growth hormone for growth.
- Feedback control
- Hormone levels are self-regulating: a rise in blood sugar triggers insulin, and the resulting fall then reduces insulin secretion.
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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, Reflex arc, Central and peripheral nervous system.
What does Class 10 Science (Biology) Chapter 6 (Control and Coordination) cover on XamBaaz?+
It has 115 NCERT-based MCQs on "Control and Coordination": 33 Easy, 42 Medium and 40 Hard. Together they make 11 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. One year from the day you pay. You stay in Class 10 till 31 March; on 1 April your account moves up to Class 11 and the rest of your year carries over. 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 11 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. 6 sample questions are on this page with answers: tap an option, or "Show answer", to see the correct option and a step-by-step 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, Reflex arc, Central and peripheral nervous system. This page shows 6 solved important MCQs with answers and explanations. Sign in to practise all 115 questions on the chapter as timed quizzes.
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.
Are there question answers and extra questions for Control and Coordination (Class 10 Science (Biology))?+
Yes. This page has 6 solved questions on Control and Coordination, each with the correct answer and a short explanation. Sign in to practise all 115 questions on the chapter as timed quizzes.
Are there assertion–reason and case study questions for Control and Coordination (Class 10 Science (Biology))?+
Yes. The Control and Coordination question bank has 9 assertion–reason questions and 12 case-based (case study) questions in the CBSE board format, alongside the regular MCQs. Each comes with the answer and a worked explanation. Sign in to practise them in timed quizzes.