the 25 most repeated and high-yield questions from the Chapter: Life Processes (Class 10 CBSE Science), based on previous year question trends (last ~4–5 years) and commonly tested concepts. These mirror real board exam questions and help boost your preparation. (Manoj Sir)
📘 Life Processes (Class 10 Science) — 25 Most Repeated CBSE Board Questions
Prepare like a topper: Cover key questions that have appeared multiple times in CBSE exams! 🌿🧠
📌 Introduction
The chapter Life Processes is a scoring unit in Class 10 Biology. It consistently contributes to board exam marks through a mix of definitions, explanations, chemical equations, diagrams, and application-based questions. Over the last few years, certain questions have shown up repeatedly in various exam formats — board papers, pre-boards, and sample papers.
🍃 A. Fundamental Definitions & Concepts
Define life processes.
— Mention the basic processes necessary for living organisms to survive.List the life processes common to all living organisms.
— Such as nutrition, respiration, transport, and excretion.Define photosynthesis.
— Often asked as a short-answer.Write the balanced chemical equation for photosynthesis.
— A guarantee in board exams. (Explain the role of chlorophyll in photosynthesis.
— Most papers expect the function of chlorophyll.What are the raw materials required for photosynthesis?
— Another frequently repeated sub-question.
🌞 B. Nutrition & Digestion
Describe human digestion.
— List organs and functions of digestive juices.State the role of amylase in digestion.
— Appears repeatedly in short-answer sections.Most of the digestion and absorption of food occurs in the — ?
(a) Small intestine (b) Stomach (c) Liver (d) Large intestineFunction of gastric glands in the stomach.
— Asked with location and role.
💨 C. Respiration
Define respiration.
— Often appears as a direct definition. Differentiate between aerobic and anaerobic respiration.— Classic 2-mark question.
Why is respiratory pigment needed in multicellular organisms?
— Recently asked with reasoning.
🌿 D. Transport in Plants & Animals
How is water transported in plants?
— Expect explanation of xylem, transpiration pull etc.What is translocation?
— Often an MCQ/short-answer item.Name the pigment present in RBCs and its role.
— Repeats almost every year.Which blood vessel carries oxygenated blood to the heart?
— Purse question from circulation.What is the role of capillaries in transport?
— Seen in structured responses.
🩸 E. Excretion
Define excretion.
— Repeated as a definition question.What is a nephron? Describe its function.
— Mark-scoring question on excretion.Explain how urine formation occurs.
— Typically for 3-4 marks.
📊 F. Application/Reason Based Questions
Why do desert plants close their stomata in day but still perform photosynthesis?
— Reason-based from plant adaptation.What happens if there is less secretion of saliva in the mouth?
— Application in digestion.Give reasons: Stomata close when water moves out of guard cells.
— Recently asked in multiple choice/long format.Suggest reasons for the movement of food in the alimentary canal.
— Linked to peristalsis and smooth muscles.
✨ Exam Strategy Tips
✅ Memorise definitions word-to-word — CBSE loves quoting NCERT language.
✅ Practice chemical equations & diagrams — balanced photosynthesis and labeled nephron/ digestive system often fetch marks.
✅ Understand reasoning questions — many recent board papers twist basics into reasoning parts (e.g., stomatal function, respiratory pigments).
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