Life Processes

CBSE Class 10 Science · every board question from this chapter, 2025–2025 · 20 of them repeated across years

• The essential element taken up from the soil by the plants to synthesize proteins is:2025asked 3×
• Select TRUE statements about lymph from the following: A. Lymph vessels carry lymph through the body and finally open into larger…2025asked 3×
• The essential element used in the synthesis of proteins is:2025
• Select the correct option from the following statements about the functioning of the human heart.2025
• The opening and closing of stomata is regulated by:2025
• One-cell thick blood vessels are known as:2025asked 3×
• Secretion of less saliva in mouth will effect the conversion of:2025asked 3×
• Listed below are the steps of nutrition in Amoeba. Select the correct sequence of these steps: (i) Diffusion of simple nutrients…2025asked 3×
• Parasitic mode of nutrition is observed in:2025
• Temporary finger-like extensions on the cell surface to take in food is formed in:2025
• The gastric glands present in the wall of the stomach release:2025
• Which one of the following is not an excretory product in plants?2025
• The basic filtration unit of the excretory system in human beings is:2025asked 3×
• In human alimentary canal, the digestive juice secreted by the gastric glands are2025asked 3×
• In aerobic respiration, the steps are: breakdown of glucose to pyruvate and its further conversion to carbon dioxide. Both…2025asked 3×
• The breakdown of glucose has taken the following pathway: Glucose Pyruvate + Energy Lactic acid + Energy The sites 'a' and 'b'…2025asked 3×
• The percentage of solar energy which is not converted into food energy by the leaves of green plants in a terrestrial ecosystem…2025asked 3×
• Assertion: In large animals, oxygen can reach different parts of the animal's body easily. Reason (R): Respiratory pigments take…2025asked 2×
• Assertion: Xylem tissue moves water and minerals obtained from the soil by the roots. Reason (R): Xylem tissue is found only in…2025asked 3×
• Assertion: Animals will not get energy if they eat (consume) coal as food. Reason (R): Specific enzymes are needed for the…2025asked 3×
• Assertion: All organisms can make organic compounds like sugar and starch from inorganic substances using radiant energy of the…2025asked 3×
• State the main function of veins in human circulatory system. Why do they not need thick walls?2025asked 2×
• Name the tissues which form the vascular bundle. State their function in plants.2025
• How is lymph formed? State its important function. OR Identify 'X' in the figure of human nephron shown below. What role does it…2025asked 3×
• Besides minimising the loss of blood, why is it essential to plug any leak in a blood vessel? Name the component of blood which…2025asked 3×
• "In human alimentary canal the small intestine is designed to absorb the digested food." Justify this statement.2025
• "Plants use a variety of techniques to get rid of waste material." Justify this statement giving any four ways.2025
• State the main function of arteries. Why do they have thick and elastic walls?2025
• Write the percentage of the energy of sunlight captured by green plants, to convert it into food energy. Explain the fate of this…2025
• Explain why respiration is considered as an exothermic reaction. Give the chemical equation for this reaction.2025
• Name the blood vessel that brings (i) oxygenated blood (ii) deoxygenated blood, to the human heart. Also name that chamber of the…2025asked 2×
• The digestion of food in human alimentary canal is a complex process. State the enzyme/salt present in the following and mention…2025
• Write the name and one function of respiratory pigment found in human beings. Why do lungs always contain a residual volume of…2025
• What is the first step of cellular respiration? In which part of the cell does it occur? Write the equation for the process of…2025
• Why is blood circulation in vertebrates known as "double circulation"? Trace its path in the form of a flow chart.2025
• On the basis of the characteristics of the processes given in the brackets in each case, differentiate between the following:…2025
• Enlist any two nitrogenous waste products removed from the blood of human kidney. Name the capillary cluster formed by the branch…2025
• List three raw materials required by terrestrial plants for photosynthesis. Explain how nature provides these raw material to the…2025
• Give reasons for the following: Rate of breathing in aquatic animals is much faster than terrestrial organisms. Rings of…2025
• (i) "The length of the small intestine in various animals depends on the food they eat." Justify the statement. (ii) Discuss the…2025asked 3×
• The maintenance functions of all living organisms must go on even when they are not doing anything particular. Even when we are…2025asked 3×

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