Life Processes

Science 10 - Chapter 06

Practice 100+ MCQs on Life Processes. Includes Basic, Intermediate, Advanced questions with detailed explanations and Mock Tests.
Prepare nutrition, respiration, transportation, and excretion in plants and animals for
Success in Class 10 Science & Competitive Exams.

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  • Life Processes: Essential activities for survival—nutrition, respiration, transportation, excretion.
  • Autotrophic Nutrition: Organisms make their own food using sunlight (photosynthesis).
  • Photosynthesis Equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (requires chlorophyll & sunlight).
  • Heterotrophic Nutrition: Organisms depend on others for food (animals, fungi).
  • Human Digestion: Starts in mouth (amylase), continues in stomach (pepsin), completes in small intestine.
  • Respiratory Systems: Lungs (humans), gills (fish), skin (earthworm), trachea (insects).
  • Aerobic Respiration: Glucose + O₂ → CO₂ + H₂O + Energy (36 ATP).
  • Anaerobic Respiration: Glucose → Lactic acid (muscles) or Ethanol + CO₂ (yeast) + 2 ATP.
  • Double Circulation: Blood passes heart twice in one cycle (mammals & birds).
  • Blood Components: RBCs (O₂ transport), WBCs (immunity), platelets (clotting), plasma (nutrients).
  • Excretory System: Kidneys → nephrons filter blood → urine → ureter → bladder → urethra.
  • Plant Transport: Xylem (water & minerals upward), Phloem (food bidirectional).
  • Transpiration: Loss of water vapor from leaves → creates suction pull.
  • ATP: Energy currency of the cell; produced during respiration.
  • Enzymes: Biological catalysts—amylase, pepsin, trypsin, lipase.

Basic Level Questions

Chapter Summary: Life Processes

This chapter unravels the fundamental processes that keep living organisms alive. You’ll explore how organisms obtain and utilize energy through nutrition and respiration, how materials are transported within bodies, and how wastes are removed. From photosynthesis in plants to the intricate human digestive and circulatory systems, you’ll understand the unity and diversity of life-sustaining mechanisms.

"Life Processes" is a high-weightage chapter in CBSE Board Exams and competitive tests like NTSE and Science Olympiads. It demands clarity on processes like photosynthesis, respiration, and human physiology. Questions often involve diagram-based explanations, chemical equations, comparative studies, and application-based scenarios. Mastering this chapter ensures strong performance in both theory and diagram-based questions.

Our platform breaks down "Life Processes" into digestible, exam-focused practice. With graded MCQs—from basic definitions to complex physiological interactions—you can systematically test your understanding. Whether it's recalling the photosynthesis equation, tracing the path of food in digestion, or comparing transport in plants and animals, our targeted questions build confidence, speed, and accuracy, turning complex biological concepts into scoring opportunities.

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