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CBSE Class 10 Science Chapter 6 Control and Coordination Worksheet with Answers

Control and Coordination is a high-weightage chapter in CBSE Class 10 Science, contributing around 8-10 marks in the board exam. This printable worksheet consolidates all NCERT topics — nervous system, reflex action, plant hormones, and animal hormones from endocrine glands — into 40+ practice questions designed to test recall, application, and higher-order thinking. Students are advised to complete this worksheet in 90 minutes under timed conditions for best results.

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Key takeaways

✓40+ NCERT-aligned practice questions covering nervous system, reflex action, plant hormones, and endocrine glands for thorough revision.
✓Structured in five sections — MCQs, fill-in-the-blanks, match-the-following, short answers, and long HOTS questions — mirroring CBSE exam format.
✓One case-study question with sub-parts to build analytical and application skills required for the 2025 board pattern.
✓Complete answer key with brief explanations for every question, enabling self-assessment and concept clarity.
✓Suggested completion time of 90 minutes at moderate-to-challenging difficulty, ideal for pre-exam practice and weak-area identification.
✓Covers all key NCERT topics: neuron structure, synapse, reflex arc, tropisms, nastic movements, thyroid, insulin, adrenaline functions.
✓Printable PDF-ready format for offline practice, useful for coaching centres and home study across Indian cities.

Quick Chapter Recap: Control and Coordination

Control and Coordination in living organisms is achieved through two systems: the nervous system and the endocrine (hormonal) system in animals, and hormonal control in plants. The nervous system uses electrical impulses transmitted via neurons, enabling rapid responses such as reflex actions. A reflex arc consists of receptor, sensory neuron, spinal cord (or brain), motor neuron, and effector. The brain (forebrain, midbrain, hindbrain) and spinal cord form the central nervous system, while cranial and spinal nerves constitute the peripheral nervous system. In plants, coordination is chemical: hormones like auxin promote cell elongation and phototropism, gibberellins stimulate stem growth, cytokinins promote cell division, and abscisic acid inhibits growth and causes stomatal closure. Animal hormones are secreted by endocrine glands — thyroid (thyroxine for metabolism), pancreas (insulin for blood sugar regulation), adrenal (adrenaline for stress response), and pituitary (growth hormone). Understanding the structure of a neuron, the path of a reflex action, and the specific roles of each hormone is essential for scoring full marks in this chapter.

Nervous system: electrical impulses via neurons; rapid response
Reflex arc: receptor → sensory neuron → spinal cord → motor neuron → effector
Plant hormones: auxin (phototropism), gibberellins (growth), cytokinins (cell division), abscisic acid (growth inhibitor)
Animal hormones: thyroxine (metabolism), insulin (blood sugar), adrenaline (stress), growth hormone (pituitary)

Worksheet Structure and Instructions

This worksheet is divided into five main sections plus one case-study question, totaling 40+ questions. Section A contains 8 multiple-choice questions (1 mark each). Section B has 6 fill-in-the-blank items (1 mark each). Section C offers a match-the-following table and 4 true/false statements (1 mark each). Section D comprises 5 short-answer questions requiring 2-3 marks each, typically 30-50 words. Section E includes 3 long-answer or higher-order thinking questions worth 5 marks each, expecting detailed explanations or diagrams. Finally, one case-study passage with 4 sub-questions (1 mark each) tests comprehension and application. All answers are provided in a dedicated Answer Key section at the end, complete with brief explanations to aid self-study. Students should attempt this worksheet in one sitting of 90 minutes, using only the NCERT textbook and class notes for reference during review. Marks allocation: Total 50 marks. Difficulty level: Moderate to Challenging, suitable for board exam preparation and periodic assessments.

Section A: 8 MCQs (1 mark each) — objective recall and concept application
Section B: 6 fill-in-the-blanks (1 mark each) — terminology and factual knowledge
Section C: 1 match-the-following + 4 true/false (5 marks total) — quick revision
Section D: 5 short-answer questions (2-3 marks each) — concise explanations
Section E: 3 long-answer HOTS questions (5 marks each) — diagrams, mechanisms, reasoning
Case-study: 1 passage with 4 sub-questions (1 mark each) — real-life application

Section A: Multiple-Choice Questions (8 MCQs × 1 mark = 8 marks)

Choose the correct option for each question. These MCQs are designed to test your understanding of fundamental concepts from NCERT Class 10 Science Chapter 6, including neuron structure, reflex action, plant tropisms, and hormone functions. Each question has four options; select the most appropriate one. Write the question number and your chosen option clearly. No negative marking applies, so attempt all questions. Review the Answer Key section to check your responses and read the explanations for any incorrect answers. These questions mirror the pattern seen in CBSE board exams and school periodic tests, ensuring you are well-prepared for objective-type questions in the final exam.

Section B: Fill in the Blanks (6 questions × 1 mark = 6 marks)

Complete each sentence using the correct term from the chapter. These fill-in-the-blank questions assess your recall of key terminology and facts related to Control and Coordination. Write your answers neatly. Spelling and accuracy count, as CBSE board examiners expect precise scientific terms as given in the NCERT textbook. Use the Answer Key provided at the end to verify your responses. This section is particularly useful for revising hormone names, parts of the nervous system, and definitions of important processes like reflex action, phototropism, and geotropism. Students often lose easy marks here due to spelling errors, so double-check before finalizing your answers.

Section C: Match the Following and True/False (1 + 4 = 5 marks)

Part I: Match the items in Column A with the correct answers in Column B. Write the pairs (e.g., 1-c, 2-a) clearly. Part II: State whether each statement is True or False. If false, you may optionally write the corrected statement in the Answer Key review for better understanding. This section consolidates your knowledge of plant and animal hormones, brain parts, and reflex pathways. It is a quick-scoring section if you have thoroughly revised the NCERT Class 10 Science notes for Chapter 6. Ensure you read each statement carefully; sometimes a single word makes the difference between true and false. Refer to the Answer Key for correct pairs and true/false answers along with brief justifications.

Section D: Short-Answer Questions (5 questions × 2-3 marks = 13 marks)

Answer each question in 30-50 words. These short-answer questions require you to explain concepts, describe processes, or differentiate between terms. Marks are awarded for correct scientific terminology, clarity, and completeness. Where a question asks for two or three points, present them as numbered or bulleted statements for better readability. Diagrams are not mandatory here unless explicitly asked, but a well-labeled sketch can sometimes fetch additional credit. Revise NCERT Class 10 Science Chapter 6 thoroughly, focusing on definitions of reflex action, tropism, and the functions of different hormones. The Answer Key provides model answers; compare your response to identify gaps in understanding or expression. These questions are similar to those in CBSE sample papers and previous years' board exams.

Section E: Long-Answer and HOTS Questions (3 questions × 5 marks = 15 marks)

These questions demand detailed explanations, well-labeled diagrams, or application of concepts to novel situations. Allocate about 12-15 minutes per question. Marks are distributed across content accuracy, diagram labeling, logical flow, and use of scientific terms. For questions asking for a diagram (e.g., neuron structure, reflex arc), ensure every part is clearly labeled and proportionate. For explanatory questions, structure your answer in short paragraphs or numbered points covering all aspects of the topic. Higher-order thinking questions may ask you to analyze a situation or predict outcomes — use your knowledge of NCERT principles to reason logically. Practice drawing diagrams from the NCERT Class 10 Science textbook multiple times before the exam. The Answer Key provides comprehensive model answers; use them to self-assess and improve your writing.

Q24. Draw a well-labeled diagram of a neuron. Describe the function of its parts. (5 marks)
Q25. Describe the reflex arc with the help of a labeled diagram. Explain why reflex actions are important. (5 marks)
Q26. (HOTS) A potted plant is placed horizontally. After a few days, the shoot bends upward and the root bends downward. Explain the phenomenon with reference to plant hormones involved. (5 marks)

Case-Study Question (1 passage with 4 sub-questions × 1 mark = 4 marks)

Read the following passage carefully and answer the questions that follow. Case-study questions are a recent addition to the CBSE Class 10 Science board exam pattern, designed to assess your ability to apply chapter concepts to real-life or experimental scenarios. Each sub-question typically carries 1 mark and may be objective (MCQ) or very short answer type. Focus on extracting information directly from the passage and linking it to your NCERT knowledge of Control and Coordination. These questions test comprehension, analytical thinking, and the ability to connect theory with practice. The Answer Key provides correct options or answers along with reasoning. Practice multiple case studies from CBSE sample papers and previous years' question papers to build confidence in this format.

Complete Answer Key with Explanations

Below are the correct answers for all sections, along with brief explanations. Use this key for self-assessment after completing the worksheet. Mark your own paper honestly, and for every incorrect answer, revisit the relevant NCERT Class 10 Science Chapter 6 section to strengthen your understanding. The explanations are kept concise but cover the essential reasoning behind each answer. For long-answer questions, the model answers are indicative; your response may vary in wording but should cover all key points to earn full marks. If you score below 35 out of 50, consider revising the entire chapter again and attempting the worksheet a second time after a few days. Students aiming for 90+ percent in boards should target a score of 45 or above on this worksheet within the 90-minute time limit.

Section A Answers: Q1–(b) Synapse, Q2–(c) Auxin, Q3–(c) Pituitary, Q4–(b) Spinal cord, Q5–(b) Insulin, Q6–(a) Light, Q7–(c) Cerebrum, Q8–(b) Insulin (it is an animal hormone).
Section B Answers: Q9–hormones, Q10–phototropism, Q11–synapse, Q12–Abscisic acid, Q13–cerebellum, Q14–adrenal.
Section C Part I: 1–(c), 2–(d), 3–(b), 4–(a). Part II: Q15–False (reflex arc uses spinal cord, not brain for decision), Q16–True, Q17–False (thyroxine from thyroid), Q18–False (spinal cord is CNS).
Section D Sample Answers: Q19–Reflex action is an automatic, rapid response to a stimulus without conscious thought, e.g., blinking. Q20–Auxin (promotes cell elongation), Gibberellin (stem growth), Cytokinin (cell division). Q21–Nervous: electrical, fast, short-lived; Hormonal: chemical, slower, long-lasting. Q22–Medulla controls involuntary actions like breathing, heartbeat. Q23–Phototropism is directional growth of plant parts towards light due to auxin redistribution.
Section E Model Answers: Q24–Diagram with dendrites (receive signals), cell body (nucleus, cytoplasm), axon (long fiber transmits impulse), myelin sheath (insulation), axon terminals (release neurotransmitters). Q25–Diagram: receptor → sensory neuron → spinal cord → motor neuron → effector; reflex actions protect body, save time. Q26–Shoot shows negative geotropism and positive phototropism (auxin moves to lower/darker side, causing upward bend); root shows positive geotropism (auxin inhibits growth on lower side, causing downward bend).
Case-Study Answers: Q27–(b) Phototropism, Q28–(c) Auxin, Q29–(b) Auxin concentration higher there, Q30–(b) Dependent on direction of stimulus.

How to Use This Worksheet for Maximum Benefit

Print this worksheet or view it on a tablet in full-screen mode. Set a timer for 90 minutes and attempt all questions in one uninterrupted session, simulating exam conditions. Do not refer to your textbook or notes while solving; this builds recall and exam temperament. After finishing, take a 10-minute break, then use the Answer Key to mark your own work. For each mistake, write a one-sentence note on what you missed or misunderstood — this active reflection cements learning. Next, open your NCERT Class 10 Science textbook to Chapter 6 and re-read the sections corresponding to your weak areas. If you consistently struggle with a particular question type (e.g., diagram-based or HOTS), practice five additional similar questions from other sources like CBSE sample papers or previous years' question papers. Repeat this worksheet after one week; aim to improve your score by at least 10 percent. Parents can use the Answer Key to guide discussions and clarify doubts. Teachers may use this worksheet as a class test, homework assignment, or revision tool before the final board exam. For students in cities without easy access to coaching, platforms like CBSETUTOR.ai offer 24×7 AI-powered tutoring where you can upload a photo of any question from this worksheet and get step-by-step solutions instantly, all at a flat fee of ₹999 per month for Classes 6-12, with a 3-day free trial to start.

Simulate exam conditions: 90 minutes, no notes, full focus
Self-mark using the Answer Key; note every mistake with a brief reason
Re-read NCERT sections for topics where you scored poorly
Retry the worksheet after one week; track score improvement
Use CBSETUTOR.ai for instant photo-based doubt solving and concept clarity at ₹999/month with 3-day trial

Tips to Score Full Marks in Control and Coordination

Control and Coordination is a concept-heavy chapter where clarity and precision matter more than rote learning. First, understand the difference between nervous and hormonal coordination — nervous is electrical and fast, hormonal is chemical and slower. Memorize the structure of a neuron and practice drawing it at least five times; label every part (dendrites, cell body, axon, myelin sheath, axon terminals). For reflex action, always mention the five components in order: receptor, sensory neuron, spinal cord (or relay neuron in spinal cord), motor neuron, effector. In plant hormones, remember the mnemonic 'A-G-C-A' for Auxin (growth, phototropism), Gibberellin (stem elongation, seed germination), Cytokinin (cell division, delays aging), Abscisic acid (stress hormone, inhibits growth, closes stomata). For animal hormones, make a table: gland name, hormone name, function — Thyroid/Thyroxine/Metabolism, Pancreas/Insulin/Blood sugar, Adrenal/Adrenaline/Stress response, Pituitary/Growth hormone/Body growth. In the exam, if a 5-mark question asks for a diagram, allocate at least 3 marks for the diagram itself and 2 for description; neat labeling is non-negotiable. Read questions twice; the word 'describe' needs more detail than 'list'. Finally, revise NCERT in-text and end-of-chapter questions at least three times before boards — many questions are directly repeated or slightly reworded in the actual paper.

Draw and label neuron and reflex arc diagrams multiple times for muscle memory
Use the mnemonic 'A-G-C-A' for plant hormones: Auxin, Gibberellin, Cytokinin, Abscisic acid
Create a gland-hormone-function table for quick revision of endocrine system
In exams, allocate marks wisely: 3 for diagram, 2 for description in a 5-mark question
Revise NCERT in-text and exercise questions at least thrice; many board questions repeat
Understand concepts rather than memorizing paragraphs — examiners reward clarity and logic

Frequently asked questions

What is the total marks allocation for Control and Coordination in CBSE Class 10 Science board exam?+

Chapter 6 Control and Coordination typically carries 6-8 marks in the CBSE Class 10 Science board exam, distributed across MCQs (1-2 marks), short-answer questions (2-3 marks each), and one long-answer or diagram-based question (5 marks). Additionally, a case-study question may include 1-2 marks from this chapter.

How should I prepare the diagram of a neuron to score full marks?+

Draw a clear, proportionate diagram showing dendrites, cell body with nucleus, long axon, myelin sheath, and axon terminals. Label each part neatly with a ruler-drawn pointer. Ensure the axon is noticeably longer than dendrites. Practice this diagram at least five times before the exam to build speed and accuracy.

What is the difference between reflex action and voluntary action?+

Reflex action is an automatic, rapid, involuntary response controlled by the spinal cord (e.g., pulling hand from a hot surface). Voluntary action is a conscious, slower response controlled by the brain (e.g., picking up a pen). Reflex actions do not involve the brain's decision-making centres, making them much faster.

Which plant hormone is responsible for phototropism, and how does it work?+

Auxin is responsible for phototropism. When light falls on one side of the plant shoot, auxin migrates to the shaded side, causing cells there to elongate more. This unequal growth bends the shoot towards the light source. Auxin concentration is lower on the illuminated side, so growth is slower there.

What are the main functions of insulin and thyroxine in the human body?+

Insulin, secreted by the pancreas, regulates blood glucose levels by facilitating glucose uptake into cells; its deficiency causes diabetes. Thyroxine, secreted by the thyroid gland, controls the rate of metabolism, growth, and development; iodine deficiency leads to goitre and reduced thyroxine production.

How can I remember all the plant hormones and their functions for the exam?+

Use the mnemonic 'A-G-C-A': Auxin (cell elongation, phototropism), Gibberellin (stem growth, seed germination), Cytokinin (cell division, delays leaf aging), Abscisic acid (growth inhibitor, stress response, stomatal closure). Make a flash card for each hormone with one key function and one example.

Is the brain involved in reflex actions? Why or why not?+

No, the brain is not involved in most reflex actions. The spinal cord acts as the control centre to save time, allowing a faster response to potentially harmful stimuli. However, sensory information does reach the brain afterward, making you aware of the reflex that occurred.

What is the role of adrenaline hormone during stress or emergency?+

Adrenaline, secreted by the adrenal glands, prepares the body for 'fight or flight' by increasing heart rate, blood pressure, and breathing rate. It also directs blood flow to muscles and reduces activity in the digestive system, enabling a quick physical response to danger.

How many times should I revise NCERT Chapter 6 before the board exam?+

Revise the chapter at least three times. First reading for understanding, second for making concise notes and practicing diagrams, third for quick revision of key points, hormone names, and definitions. Solve NCERT in-text and end-of-chapter questions after each revision to reinforce concepts.

Can CBSETUTOR.ai help me with doubts in Control and Coordination?+

Yes, CBSETUTOR.ai offers 24×7 AI tutoring for CBSE Classes 6-12. You can upload a photo of any question from this worksheet or the NCERT textbook and receive step-by-step solutions instantly. The platform covers all subjects at a flat ₹999 per month, with a 3-day free trial to explore its features.

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