CBSE Class 10 Science Chapter 6 Control and Coordination Important Questions 2027
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23 questions from Control and Coordination appeared in 6 of the 7 CBSE papers we analysed (2022–2026) — here are the topics that matter, the questions that repeat, and every previous-year question from this chapter.
Key facts
- World of Living unit — 25 marks in the official syllabus
- Asked in 6 of 7 analysed papers (2022–2026)
- About 3.3 questions per paper (OR alternatives counted separately)
- 6 question patterns repeated across papers
Important topics in Control and Coordination
| # | Topic | Asked in | Importance |
|---|---|---|---|
| 1 | Plant hormones and tropic movements | Board 2023Board 2024Board 2025Board 2026Sample 2025 | ★★★★☆ |
| 2 | Animal hormones (endocrine glands and functions) | Board 2023Board 2024Board 2026Sample 2026 | ★☆☆☆☆ |
| 3 | Human brain structure and function | Board 2026Sample 2025Sample 2026 | ★☆☆☆☆ |
| 4 | Human nervous system and neuron / reflex arc | Board 2024Sample 2026 | ★☆☆☆☆ |
| 5 | Reflex action and its pathway | Board 2024Board 2026 | ★☆☆☆☆ |
Repeated questions from Control and Coordination
1. Brain parts and their functions
3×Board 2026Sample 2025Sample 20261 marks
Following are the statements about the different parts of the brain. Select the correct statements. (i) The thinking part of the brain is the forebrain. (ii) Centres for smell, hearing, memory, sight are located in forebrain. (iii) Salivation, vomiting, blood pressure are controlled by medulla in the hind brain. (iv) Cerebellum does not control the posture and balance of the body. (A) (i), (ii) and (iii) (B) (ii), (iii) and (iv) (C) (i), (ii) and (iv) (D) (i), (iii) and (iv)
2. Auxin and phototropic bending of shoots
3×Board 2025Board 2026Sample 20251/2 marks
[case context] Plants show movements in response to environmental stimuli regulated by plant hormones. What role does auxin play in the growth of plants?
3. Differentiate nastic (sensitive-plant) movement from tropic movement
3×Board 2024Board 2025Board 20262/3 marks
[case context] Plants show movements in response to environmental stimuli regulated by plant hormones. Differentiate between movement shown by the sensitive plant and tropic movement by plants (Two points).
4. Neuron structure and impulse transmission
2×Board 2024Sample 20261/3 marks
Draw and explain how the nerve cells help in transmission of impulses?
5. Insulin, blood sugar regulation and diabetes
2×Board 2023Sample 20261/2 marks
The blood glucose level in a patient was very high. It may be due to inadequate secretion of: A. growth hormone from pituitary gland B. oestrogen from ovary C. insulin from pituitary gland D. insulin from pancreas
6. Define reflex action and show the reflex arc
2×Board 2024Board 20262/3 marks
Sunil unconsciously touched the hot iron rod and immediately withdrew his hand. Which type of action is involved? Also define this action. Draw a flow chart to show the path followed for this action.
Control and Coordination questions by paper
| Paper | Questions | Marks |
|---|---|---|
| Board 2022 | 0 | 0 |
| Board 2023 | 2 | 3 |
| Board 2024 | 4 | 8 |
| Board 2025 | 2 | 4 |
| Sample 2025 | 5 | 7 |
| Board 2026 | 7 | 11 |
| Sample 2026 | 3 | 5 |
Counts include both options of internal-choice (OR) questions.
Previous year questions: Control and Coordination
Board 2026 7 questions
Following are the statements about the different parts of the brain. Select the correct statements. (i) The thinking part of the brain is the forebrain. (ii) Centres for smell, hearing, memory, sight are located in forebrain. (iii) Salivation, vomiting, blood pressure are controlled by medulla in the hind brain. (iv) Cerebellum does not control the posture and balance of the body. (A) (i), (ii) and (iii) (B) (ii), (iii) and (iv) (C) (i), (ii) and (iv) (D) (i), (iii) and (iv)
[case context] Plants exhibit movements in response to environmental stimuli (light, gravity, water, chemicals) regulated by plant hormones; roots and shoots show contrasting responses to the same stimulus. Why is hydrotropism essential for plants?
[case context] Plants show movements in response to environmental stimuli regulated by plant hormones. What role does auxin play in the growth of plants?
Varun is diabetic. His latest ultrasound reports showed a blockage in his pancreatic duct. How will this affect the dual functioning of the pancreas?
Sunil unconsciously touched the hot iron rod and immediately withdrew his hand. Which type of action is involved? Also define this action. Draw a flow chart to show the path followed for this action.
[case context] Plants show movements in response to environmental stimuli regulated by plant hormones. Differentiate between movement shown by the sensitive plant and tropic movement by plants (Two points).
[case context] Plants show movements in response to environmental stimuli regulated by plant hormones. OR alternative for (c): How does movement of roots differ from that of shoots in response to gravity and light?
Sample 2026 3 questions
Which of the following is a correct combination of function and part of the brain? A. Posture and balance: Cerebrum B. Salivation: Medulla in midbrain C. Hunger: Pons in hindbrain D. Blood pressure: Medulla in hindbrain
The blood glucose level in a patient was very high. It may be due to inadequate secretion of: A. growth hormone from pituitary gland B. oestrogen from ovary C. insulin from pituitary gland D. insulin from pancreas
Draw and explain how the nerve cells help in transmission of impulses?
Board 2025 2 questions
The plant hormone whose concentration stimulates the cells to grow longer on the side of the shoot which is away from light is : (A) Cytokinins (B) Gibberellins (C) Adrenaline (D) Auxins
Plants have neither a nervous system nor muscles, even then they respond to stimuli. For example, the leaves of chhui-mui (touch-me-not) plant when touched begin to fold up and droop. (a) How is the information communicated in "touch-me-not" plants ? (b) What enables the plant cells to bring out the observable response ? (c) Differentiate the movement mentioned above from the movement of tendrils in a pea plant.
Sample 2025 5 questions
There was a cerebellar dysfunction in a patient. Which of the following activities will get disturbed in this patient as a result of this? A. Salivation B. Hunger control C. Posture and balance D. Regulation of blood pressure
[Case context: shoots bending towards sunlight and 'Touch me not' leaves folding on touch; how movements occur in plants.] C. Compare the movement of growth of the pollen tube towards ovule with the movements shown in part A of the above figure. (1)
[Case context: shoots bending towards sunlight and 'Touch me not' leaves folding on touch; how movements occur in plants.] D. Compare the movement shown in figure B with the movement of body parts in the animals. (1)
[Case context: Mohan and Rohit observed that shoots of a plant growing in shade bend towards the sunlight, whereas leaves of 'Touch me not' plant fold and droop soon after touching; they want to know how these movements occur in plants.] Attempt either subpart A or B. A. What causes the bending of shoots in the plants as shown in figure A (shoots bending towards light)? (2)
[Case context: shoots bending towards sunlight and 'Touch me not' leaves folding on touch; how movements occur in plants.] Attempt either subpart A or B. B. What causes the folding of the leaves in 'Touch me not' plant as shown in figure B? (2)
Board 2024 4 questions
In a nerve cell, the site where the electrical impulse is converted into a chemical signal is known as: (a) Axon (b) Dendrites (c) Neuromuscular junction (d) Cell body
How is the movement of leaves of a sensitive plant different from the downward movement of the roots?
There is a hormone which regulates carbohydrate, protein and fat metabolism in our body. Name the hormone and the gland which secretes it. Why is it important for us to have iodised salt in our diet?
Define reflex action. With the help of a flow chart show the path of a reflex action such as sneezing.
Board 2023 2 questions
Select from the following the correct statement about tropic movement in plants: (a) It is due to stimulus of touch and temperature. (b) It does not depend upon the direction of stimulus received. (c) It is observed only in roots and not in stems. (d) It is a growth related movement.
(a) Write the role of insulin in regulating blood sugar levels in human body. Mention the disease caused due to it. (b) How is the timing and the amount of release of insulin in the blood regulated?
Frequently asked questions
What are the most important topics in CBSE Class 10 Science Chapter 6 Control and Coordination?
By how often and how recently they were asked: Plant hormones and tropic movements; Animal hormones (endocrine glands and functions); Human brain structure and function.
How many marks does Control and Coordination carry in the CBSE Class 10 Science exam?
Control and Coordination is part of the World of Living unit, which carries 25 marks in the official syllabus. In the analysed papers it had about 3.3 questions per paper.
Do questions from Control and Coordination repeat in board exams?
Yes — 6 question patterns from this chapter appeared in two or more past board or official sample papers. They are listed on this page with the years they were asked.