Life Processes
16 solved questions from Class 10 Science, each with the full working. Tap any question to see the step-by-step solution.
- 1 A plant loses 0.12 g of water in 30 minutes. Calculate the rate of transpiration in milligrams per minute. easy 1 mark Rate calculation of transpiration
- 2 Explain how oxygen is transported from the alveoli of the lungs to the body cells. medium 2 marks Oxygen transport in blood
- 3 Which tissue in a tall tree is primarily responsible for the upward movement of water from roots to leaves? medium MCQ 1 mark Xylem function in transpiration pull
- 4 Name the organ in the human body where filtration of blood takes place during urine formation. easy 1 mark Excretion – kidney filtration
- 5 Which enzyme present in human saliva initiates the digestion of carbohydrates? easy MCQ 1 mark Digestive enzymes in mouth
- 6 What is the pigment present in chloroplasts that captures sunlight for photosynthesis? easy 1 mark Photosynthetic pigment
- 7 A 10 g sample of starch (molar mass 162 g·mol⁻¹) is completely hydrolyzed by amylase to glucose (molar mass 180 g·mol⁻¹). Calculate the mass of glucose formed. medium 2 marks Stoichiometry of carbohydrate digestion
- 8 In which part of the nephron does the majority of water reabsorption occur during urine formation? easy 1 mark Site of water reabsorption in kidney
- 9 Explain the process by which leguminous plants obtain usable nitrogen from the atmosphere, mentioning the role of root nodules, bacteria, and the subsequent assimilation into plant proteins. hard 4 marks Nitrogen fixation and assimilation in legumes
- 10 Which hormone is primarily responsible for lowering the blood glucose level after a meal? easy MCQ 1 mark Hormone regulating blood glucose
- 11 An adult at rest consumes oxygen at a rate of 250 mL per minute (measured at STP). Express this oxygen consumption in moles per minute. medium 2 marks Conversion of gas volume to moles
- 12 What is the primary topic or theoretical principle explored in 'Life Processes' (Class 10 SCIENCE)? medium MCQ Chapter Core Principle
- 13 Which key mechanism or analytical rule is highlighted in 'Life Processes'? medium MCQ Key Analytical Mechanism
- 14 Which of the following hormones regulates the level of calcium in the blood? easy MCQ 1 mark Hormonal regulation of calcium
- 15 A plant loses 0.12 g of water in 30 minutes through transpiration. Calculate the rate of transpiration in milligrams per minute. hard 3 marks Transpiration rate calculation
- 16 Explain the role of amylase in the digestion of starch in the human mouth. medium 3 marks Enzyme action in carbohydrate digestion