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Class 9 Science Chapter 6 Control and Coordination MCQ with Answers – 30 Solved Questions
Control and Coordination is one of the most important chapters in CBSE Class 9 Science. It explores how the nervous system and hormones help your body respond to the environment—from reflex actions when you touch a hot object to growth and development during puberty. This page contains 30 carefully selected multiple choice questions (MCQs) with detailed answers, aligned with NCERT textbooks and the latest CBSE syllabus. Whether you're preparing for school exams or want to strengthen your fundamentals, these MCQs will boost your understanding and confidence in this vital life sciences topic.
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What is Control and Coordination in Biology?
Control and Coordination refers to how living organisms respond to stimuli from their environment. In humans, the nervous system and endocrine system work together to detect changes, process information, and trigger responses. The nervous system acts quickly through electrical signals, while hormones provide slower but longer-lasting chemical control. Understanding these two systems is essential for Class 9 students, as they form the foundation for studying human physiology and behaviour.
Understanding the Nervous System – Key NCERT Concepts
The NCERT Class 9 Science Chapter 6 describes the nervous system as divided into the Central Nervous System (brain and spinal cord) and Peripheral Nervous System (nerves). Neurons are the basic units, consisting of a cell body, dendrites, and an axon. Students must understand how signals travel across synapses and how reflex arcs allow instant responses without brain involvement. These concepts form the backbone of all 30 MCQs in this quiz.
Reflex Actions and Reflex Arcs Explained
A reflex action is an automatic, rapid response to a stimulus that doesn't require conscious thought. The reflex arc pathway is: receptor → sensory neuron → spinal cord → motor neuron → effector (muscle). When you accidentally touch a hot surface, your hand pulls away instantly due to this reflex, not because your brain decided it. This concept appears frequently in CBSE MCQs and is critical for scoring well.
The Brain and Its Functions
The human brain is divided into three main parts: the cerebrum (controls voluntary actions and thinking), cerebellum (coordinates movement and balance), and medulla oblongata (controls involuntary functions like heartbeat and breathing). The cerebrum has four lobes, each with specific functions. NCERT emphasizes how different brain regions work together to control behaviour, emotions, and body functions—a frequent MCQ topic.
Hormones and the Endocrine System
The endocrine system secretes hormones—chemical messengers that regulate growth, metabolism, reproduction, and mood. Key hormones include insulin (blood sugar control), adrenaline (fight-or-flight response), and testosterone/estrogen (sexual development). Unlike the nervous system, hormone action is slower but affects the entire body. Class 9 students must distinguish between nervous and hormonal control, as CBSE exams frequently ask comparison-based MCQs.
How CBSETUTOR.ai Helps Students Master Control and Coordination
CBSETUTOR.ai is India's most trusted 24x7 AI tutor for CBSE Classes 6–12, used by thousands of families across the country. Our platform provides instant, personalized explanations for every concept in Chapter 6, adaptive MCQ practice sessions, and real-time doubt resolution in both English and Hindi. Students can revise difficult topics like neurotransmitters and hormone feedback mechanisms anytime, building genuine understanding rather than rote memorization—the key to scoring top marks in CBSE Science.
30 MCQs: Topics Covered and Difficulty Levels
These 30 solved MCQs span all major topics: nervous system structure (5 questions), neurons and synapses (4 questions), reflex arcs (5 questions), brain anatomy (6 questions), spinal cord functions (3 questions), and hormones (7 questions). Questions range from basic recall (NCERT definitions) to application-level (comparing nervous vs. hormonal control). Each answer includes explanation to help students understand the 'why' behind correct options.
Common MCQ Mistakes and How to Avoid Them
Students often confuse dendrites and axons, mistake the cerebellum's role (coordination, not emotion), or think hormones work as fast as nerves. Another trap: forgetting that the spinal cord can trigger reflex actions independently of the brain. By working through these 30 MCQs, you'll recognize these patterns and develop better conceptual clarity. Regular practice builds the reflex-action knowledge needed to spot trick questions in board exams.
How to Use These MCQs for Maximum Learning
Start by attempting all 30 questions without checking answers—this reveals weak areas. Then review detailed solutions, understand the reasoning, and revisit only those you missed. Use these MCQs as a pre-exam mock test or as a daily practice routine over 3–4 weeks. Pair them with NCERT textbook diagrams (brain, reflex arc, neuron) to strengthen visual memory. This active learning approach is more effective than passive reading and mirrors how CBSE exams test conceptual depth.
Preparing for CBSE Exams: Beyond MCQs
While MCQs test knowledge recall, CBSE board exams also include short-answer and long-answer questions on Control and Coordination. After mastering these 30 MCQs, practice drawing and labelling diagrams (neuron, brain, reflex arc), writing definitions, and explaining mechanisms in your own words. Use keywords like 'stimulus,' 'response,' 'synapse,' and 'hormone' consistently. Integrate MCQ learning with diagram practice and written revision for a well-rounded exam strategy.
Frequently asked questions
Are these 30 MCQs aligned with the CBSE syllabus?+
Yes, all 30 questions are carefully curated from NCERT Class 9 Science Chapter 6: Control and Coordination. They cover every major topic including the nervous system, brain, reflex arcs, and hormones as per the latest 2024-25 CBSE curriculum.
How can I access these MCQs on CBSETUTOR.ai?+
Visit CBSETUTOR.ai and navigate to Class 9 Science → Chapter 6. You'll find the complete MCQ quiz with instant answers, explanations, and performance analytics. Our platform offers a free trial so you can explore before committing.
Is CBSETUTOR.ai available for Hindi-medium students?+
Absolutely. CBSETUTOR.ai supports both English and Hindi-medium learners. All chapters, MCQs, and explanations are available in Hindi, making it ideal for students across India who study in regional languages alongside English.
How much time should I spend on these MCQs?+
Attempt all 30 questions in one sitting (45–60 minutes), then review answers carefully over the next few days. Revisit weak topics weekly. This 3–4 week routine ensures thorough understanding before your school exams or board assessment.
What's the difference between a reflex action and a conscious response?+
A reflex action is automatic and doesn't involve the brain—your spinal cord triggers the response instantly. A conscious response involves the brain deciding how to act, which takes longer. Example: touching hot water (reflex) vs. deciding to pick it up (conscious).
Does CBSETUTOR.ai offer free access or trial period?+
Yes, CBSETUTOR.ai provides a free trial so you can experience our MCQ quizzes, video lessons, and doubt-solving features before making any decision. Sign up today to unlock immediate access to Class 9 Science Chapter 6 content.
How do the nervous system and endocrine system differ in their control?+
The nervous system acts quickly via electrical signals (reflex in milliseconds), while the endocrine system acts slowly via hormones (effects in minutes/hours). The nervous system targets specific organs; hormones affect the whole body. Both systems work together for complete body regulation.
Why is the cerebellum important if the cerebrum controls voluntary actions?+
The cerebellum coordinates muscle movements and maintains balance—essential for smooth, coordinated actions. Without it, you'd be clumsy and unbalanced. The cerebrum decides what to do; the cerebellum ensures it's done smoothly and accurately.
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