ANAND CLASSES discuss MCQs comprehensively cover the topic of life processes. Here are some multiple-choice questions (MCQs) based on the topic Life Processes of Chapter 1 Life Processes for CBSE Class 10 Science Biology along with answers and explanations.
MCQs on Types of Life Processes
1. Which of the following is NOT a basic life process?
A) Nutrition
B) Respiration
C) Photosynthesis
D) Excretion
✅ Answer: C) Photosynthesis
💡 Explanation: Photosynthesis is a process specific to plants and some microorganisms for making food. However, basic life processes are those essential for survival and common to all living organisms, such as nutrition, respiration, transport, excretion, control & coordination, growth, movement, and reproduction.
2. The process by which living organisms remove waste materials from their body is called:
A) Respiration
B) Nutrition
C) Excretion
D) Digestion
✅ Answer: C) Excretion
💡 Explanation: Excretion is the biological process of removing metabolic waste from the body, such as urea in humans and oxygen in plants. This helps maintain homeostasis and prevents toxicity.
3. What is the main function of respiration in living organisms?
A) Breaking down food to release energy
B) Transporting nutrients
C) Removing waste materials
D) Producing new cells
✅ Answer: A) Breaking down food to release energy
💡 Explanation: Respiration is the process in which the energy stored in food is released through biochemical reactions. This energy is essential for various biological functions, including movement, growth, and maintaining body temperature.
4. Which life process helps in the movement of substances like nutrients and gases within the body?
A) Excretion
B) Reproduction
C) Transport
D) Growth
✅ Answer: C) Transport
💡 Explanation: Transport is responsible for moving essential substances like oxygen, nutrients, hormones, and waste products throughout the organism’s body, ensuring that all parts function efficiently.
5. Why do living organisms need energy even when they are asleep?
A) Because they are still thinking
B) To maintain biological processes like heartbeat and respiration
C) To perform physical activities
D) To digest food
✅ Answer: B) To maintain biological processes like heartbeat and respiration
💡 Explanation: Even during sleep, vital biological functions such as breathing, blood circulation, and cell repair continue, all of which require energy derived from food.
6. Which life process is necessary to ensure the continuation of a species?
A) Growth
B) Respiration
C) Reproduction
D) Excretion
✅ Answer: C) Reproduction
💡 Explanation: Reproduction allows organisms to produce offspring, ensuring the survival and continuation of their species over generations.
7. The chemical energy required for life processes is obtained from:
A) Water
B) Sunlight
C) Food
D) Oxygen
✅ Answer: C) Food
💡 Explanation: Food provides energy to living organisms through biochemical reactions, such as respiration, which breaks down food molecules to release usable energy.
8. Which of the following statements about movement in living organisms is true?
A) All living organisms can move from one place to another
B) Movement only occurs in animals
C) Plants do not show movement
D) Movement includes both locomotion and movement of body parts
✅ Answer: D) Movement includes both locomotion and movement of body parts
💡 Explanation: While animals show locomotion (moving from place to place), plants also exhibit movement, such as the opening of flowers and bending towards sunlight.
9. Which of the following life processes is responsible for converting food into energy?
A) Excretion
B) Nutrition
C) Respiration
D) Transport
✅ Answer: C) Respiration
💡 Explanation: Respiration is the process in which food molecules (like glucose) are broken down in the presence of oxygen to release energy in the form of ATP, which is used for various biological activities.
10. What is the main purpose of the process of nutrition in living organisms?
A) To remove waste from the body
B) To provide energy and materials for growth and repair
C) To transport oxygen in the body
D) To produce offspring
✅ Answer: B) To provide energy and materials for growth and repair
💡 Explanation: Nutrition involves the intake of food and its conversion into simpler molecules to be absorbed by the body, providing energy and essential materials for growth and repair.
11. Which of the following life processes ensures that organisms respond to environmental changes?
A) Growth
B) Excretion
C) Control and Coordination
D) Reproduction
✅ Answer: C) Control and Coordination
💡 Explanation: Control and coordination allow organisms to respond to stimuli (such as light, temperature, and touch), helping them adapt to changing environments for survival.
12. What is the primary function of excretion in living organisms?
A) Transport of nutrients
B) Elimination of metabolic waste products
C) Digestion of food
D) Regulation of body temperature
✅ Answer: B) Elimination of metabolic waste products
💡 Explanation: Excretion removes harmful substances, such as urea, carbon dioxide, and excess salts, from the body to maintain internal balance and prevent toxicity.
13. Which of the following is an example of movement in plants?
A) Walking
B) Bending towards light
C) Running
D) Jumping
✅ Answer: B) Bending towards light
💡 Explanation: Plants show movement in response to stimuli, such as phototropism (bending towards light) and nastic movements (such as the opening and closing of flowers).
14. Which life process is directly responsible for an organism growing from a small size to a larger size?
A) Reproduction
B) Growth
C) Respiration
D) Nutrition
✅ Answer: B) Growth
💡 Explanation: Growth refers to the increase in the size and number of cells, leading to the development of an organism from infancy to adulthood.
15. Which of the following organisms does NOT perform locomotion but still exhibits movement?
A) Dog
B) Bird
C) Tree
D) Fish
✅ Answer: C) Tree
💡 Explanation: While trees do not move from one place to another (locomotion), they do show movements such as opening and closing of stomata, bending toward sunlight, and root growth in response to gravity.
16. What is the role of transport in living organisms?
A) It provides energy to cells
B) It helps in digestion
C) It circulates nutrients, gases, and waste products throughout the body
D) It helps in movement of body parts
✅ Answer: C) It circulates nutrients, gases, and waste products throughout the body
💡 Explanation: The transport system moves essential substances like oxygen, carbon dioxide, nutrients, and hormones to different parts of the body, ensuring proper functioning.
17. Which life process helps in the removal of carbon dioxide from the human body?
A) Nutrition
B) Excretion
C) Respiration
D) Reproduction
✅ Answer: B) Excretion
💡 Explanation: Excretion helps remove waste products, including carbon dioxide (through exhalation), urea (through urine), and sweat.
18. Which of the following statements is TRUE about reproduction?
A) It is essential for individual survival
B) It is essential for the continuation of species
C) It helps in digestion
D) It is a part of excretion
✅ Answer: B) It is essential for the continuation of species
💡 Explanation: Reproduction ensures that species do not become extinct by producing new offspring to carry on the lineage.
19. Why is energy needed even when an organism is not physically active?
A) To store it for later use
B) For ongoing biological processes such as circulation and breathing
C) Because energy is continuously wasted
D) To help in excretion
✅ Answer: B) For ongoing biological processes such as circulation and breathing
💡 Explanation: Even when an organism is at rest, energy is required for essential life functions like maintaining heartbeat, digestion, and cell repair.
20. What is the ultimate source of energy for all living organisms?
A) Oxygen
B) Sunlight
C) Water
D) Carbon dioxide
✅ Answer: B) Sunlight
💡 Explanation: Sunlight is the ultimate energy source, as plants use it for photosynthesis to make food, which in turn provides energy to herbivores and carnivores in the food chain.
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