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Students can access the life processes class 10 questions and answers on this page. These questions are crafted after thoroughly analyzing the latest exam pattern and syllabus to aid in effective exam preparation. Practicing these questions will significantly benefit students, as some may appear in the board exams. Additionally, questions from previous years’ papers have been included. Students can conveniently download the PDF of these important questions for Class 10 Science Chapter 6 by clicking the link below.
Important Questions for Life Processes Class 10 Questions And Answers Pdf
Very Short Answer Questions
Q. What are life processes?
Ans. Life processes are the basic functions performed by living organisms to maintain and sustain life, such as nutrition, respiration, transportation, and excretion.
Q. Define autotrophic nutrition.
Ans. Autotrophic nutrition is a mode of nutrition where organisms synthesize their own food using sunlight, water, and carbon dioxide, e.g., green plants.
Q. What is photosynthesis?
Ans. Photosynthesis is the process by which green plants make their own food using sunlight, carbon dioxide, and water, producing oxygen as a by-product.
Q. Name the organelle where photosynthesis occurs.
Ans. Photosynthesis occurs in the chloroplasts of plant cells.
Also Read: Extra Questions for Class 10 Science Chapter 6 Life Processes
Q. What is the role of stomata in plants?
Ans. Stomata are small pores on the leaf surface that facilitate gas exchange and transpiration.
Q. Define heterotrophic nutrition.
Ans. Heterotrophic nutrition is a mode of nutrition where organisms depend on other organisms for food.
Q. What is the main function of the human digestive system?
Ans. The main function of the human digestive system is to break down food into simpler substances that can be absorbed and utilized by the body.
Q. Name the enzyme present in saliva.
Ans. The enzyme present in saliva is amylase.
Q. What is the main site of protein digestion in the human body?
Ans. The main site of protein digestion in the human body is the stomach.
Q. What are the end products of photosynthesis?
Ans. The end products of photosynthesis are glucose and oxygen.
Short Answer Questions
Q. Explain the process of nutrition in amoeba.
Ans. Amoeba engulfs food particles by forming pseudopodia around them, creating a food vacuole where enzymes break down the food, and the nutrients are absorbed into the cytoplasm.
Q. What is the significance of the small intestine in digestion?
Ans. The small intestine is the site where most digestion and absorption of nutrients occur. It receives digestive enzymes from the pancreas and bile from the liver to aid in this process.
Also Check: CBSE Class 10 Science MCQs Chapter 6 Life Processes
Q. Describe the structure and function of nephron in the human excretory system.
Ans. A nephron is the functional unit of the kidney, consisting of a glomerulus and a renal tubule. It filters blood to remove waste products and reabsorbs useful substances, forming urine.
Q. What is the role of hemoglobin in the transport of oxygen?
Ans. Hemoglobin in red blood cells binds to oxygen in the lungs and carries it to tissues and cells throughout the body, releasing it for cellular respiration.
Q. Differentiate between aerobic and anaerobic respiration.
Ans. Aerobic respiration occurs in the presence of oxygen, producing carbon dioxide, water, and energy. Anaerobic respiration occurs in the absence of oxygen, producing less energy and by-products like lactic acid or alcohol.
Q. What are the components of human blood?
Ans. Human blood consists of plasma, red blood cells, white blood cells, and platelets.
Q. Explain the process of transpiration in plants.
Ans. Transpiration is the process of water loss from aerial parts of plants, mainly through stomata. It helps in cooling the plant, nutrient transport, and maintaining turgor pressure.
Q. How do guard cells regulate the opening and closing of stomata?
Ans. Guard cells swell with water to open stomata and shrink to close them, regulating gas exchange and water loss.
Q. What is the function of the liver in the human digestive system?
Ans. The liver produces bile, which helps in the emulsification and digestion of fats.
Q. Describe the double circulation in humans.
Ans. Double circulation refers to the separate pathways for oxygenated and deoxygenated blood. The heart pumps oxygenated blood to the body and deoxygenated blood to the lungs.
Long Answer Questions
Q. Explain the process of photosynthesis in detail.
Ans. Photosynthesis is a two-step process involving light-dependent reactions and the Calvin cycle. Light-dependent reactions occur in the thylakoid membranes, converting solar energy into chemical energy (ATP and NADPH). The Calvin cycle occurs in the stroma, using ATP and NADPH to synthesize glucose from carbon dioxide and water.
Also Read: Class 10 Science Notes Chapter 6 Life Processes
Q. Describe the human respiratory system and its functioning.
Ans. The human respiratory system includes the nasal cavity, pharynx, larynx, trachea, bronchi, and lungs. Air enters through the nasal cavity, passes through the pharynx and larynx into the trachea, which splits into bronchi leading to the lungs. In the lungs, oxygen is exchanged for carbon dioxide in the alveoli.
Q. Explain the process of digestion in the human alimentary canal.
Ans. Digestion begins in the mouth with salivary amylase breaking down starch. The food then moves to the stomach, where gastric juices further digest proteins. In the small intestine, pancreatic enzymes and bile complete digestion, and nutrients are absorbed into the bloodstream.
Q. What are the different types of heterotrophic nutrition? Give examples.
Ans. Heterotrophic nutrition includes holozoic (ingestion of solid food, e.g., humans), saprophytic (feeding on decaying organic matter, e.g., fungi), and parasitic (feeding on a host organism, e.g., tapeworm).
Q. Discuss the role of the heart in the human circulatory system.
Ans. The heart is a muscular organ that pumps blood throughout the body. It has four chambers: two atria and two ventricles. The right side pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body.
Q. Describe the structure and function of the human excretory system.
Ans. The excretory system includes the kidneys, ureters, bladder, and urethra. Kidneys filter blood to remove waste products, which are excreted as urine. Ureters transport urine to the bladder for storage, and it is eventually expelled through the urethra.
Q. What is the importance of transpiration in plants?
Ans. Transpiration helps in the uptake and transport of water and minerals, cooling the plant, and maintaining turgor pressure, which is essential for plant rigidity and nutrient transport.
Q. Explain the process of cellular respiration.
Ans. Cellular respiration involves glycolysis, the Krebs cycle, and the electron transport chain. Glucose is broken down to produce ATP, carbon dioxide, and water. Glycolysis occurs in the cytoplasm, while the Krebs cycle and electron transport chain occur in the mitochondria.
Q. Discuss the adaptations of leaves for photosynthesis.
Ans. Leaves are adapted for photosynthesis with a large surface area, chloroplasts containing chlorophyll, stomata for gas exchange, and a network of veins for water and nutrient transport.
Q. How does the human body maintain homeostasis?
Ans. The human body maintains homeostasis through feedback mechanisms involving various systems. For example, the endocrine system regulates hormones, the respiratory system maintains oxygen and carbon dioxide levels, and the excretory system removes waste products.
