NCERT Class 7 Science MCQ | Chapter 10: Life Processes in Plants
1. Which of the following is an important life process in plants?
(A) Nutrition
(B) Respiration
(C) Transport
(D) All of the above
Answer: (D) All of the above
2. How do green plants prepare their own food?
(A) By photosynthesis
(B) By respiration
(C) By transpiration
(D) By digestion
Answer: (A) By photosynthesis
3. Which gas is required by green plants for photosynthesis?
(A) Oxygen
(B) Carbon dioxide
(C) Nitrogen
(D) Hydrogen
Answer: (B) Carbon dioxide
4. Which gas is released during photosynthesis?
(A) Oxygen
(B) Carbon dioxide
(C) Nitrogen
(D) Hydrogen
Answer: (A) Oxygen
5. Which pigment helps green plants absorb light energy for photosynthesis?
(A) Chlorophyll
(B) Haemoglobin
(C) Melanin
(D) Keratin
Answer: (A) Chlorophyll
6. Where does photosynthesis mainly take place in a plant?
(A) Green parts, especially leaves
(B) Roots only
(C) Flowers only
(D) Seeds only
Answer: (A) Green parts, especially leaves
7. What is the main source of energy for photosynthesis?
(A) Sunlight
(B) Soil
(C) Wind
(D) Oxygen
Answer: (A) Sunlight
8. Which substances are used by plants as raw materials for photosynthesis?
(A) Carbon dioxide and water
(B) Oxygen and glucose
(C) Nitrogen and oxygen
(D) Glucose and oxygen
Answer: (A) Carbon dioxide and water
9. What is the main food produced during photosynthesis?
(A) Glucose
(B) Protein
(C) Fat
(D) Mineral salt
Answer: (A) Glucose
10. Through which structures do leaves mainly exchange gases with the surrounding air?
(A) Stomata
(B) Roots
(C) Veins
(D) Flowers
Answer: (A) Stomata
11. What are stomata?
(A) Tiny pores present mainly on the surface of leaves
(B) Tubes found only inside roots
(C) Structures that produce seeds
(D) Parts that absorb minerals from soil
Answer: (A) Tiny pores present mainly on the surface of leaves
12. Which cells control the opening and closing of stomata?
(A) Guard cells
(B) Root cells
(C) Xylem cells
(D) Phloem cells
Answer: (A) Guard cells
13. What is respiration in plants?
(A) The process of releasing energy from food
(B) The process of preparing food using sunlight
(C) The process of absorbing minerals only
(D) The process of producing seeds
Answer: (A) The process of releasing energy from food
14. Do plants respire?
(A) Yes, plants respire throughout their life
(B) No, only animals respire
(C) Only flowers respire
(D) Only roots respire
Answer: (A) Yes, plants respire throughout their life
15. Which gas is generally used by plants during aerobic respiration?
(A) Oxygen
(B) Carbon dioxide
(C) Nitrogen
(D) Hydrogen
Answer: (A) Oxygen
16. Which gas is released during aerobic respiration in plants?
(A) Carbon dioxide
(B) Oxygen
(C) Nitrogen
(D) Hydrogen
Answer: (A) Carbon dioxide
17. What is transpiration?
(A) Loss of water vapour from the aerial parts of a plant, mainly through stomata
(B) Absorption of food by roots
(C) Production of glucose in roots
(D) Release of oxygen from seeds only
Answer: (A) Loss of water vapour from the aerial parts of a plant, mainly through stomata
18. Which plant organ mainly absorbs water and minerals from the soil?
(A) Roots
(B) Leaves
(C) Flowers
(D) Fruits
Answer: (A) Roots
19. Which tissue transports water and minerals from the roots to other parts of the plant?
(A) Xylem
(B) Phloem
(C) Epidermis
(D) Stomata
Answer: (A) Xylem
20. Which tissue transports food made in the leaves to different parts of the plant?
(A) Phloem
(B) Xylem
(C) Epidermis
(D) Guard cells
Answer: (A) Phloem
21. What is the upward movement of water and minerals through the xylem called?
(A) Transport of water and minerals
(B) Photosynthesis
(C) Respiration
(D) Digestion
Answer: (A) Transport of water and minerals
22. Why is transport of water important for plants?
(A) Water is required for photosynthesis and other vital processes
(B) Water is used only to make flowers colourful
(C) Water stops all plant processes
(D) Water is needed only by seeds
Answer: (A) Water is required for photosynthesis and other vital processes
23. Which process helps plants lose excess water in the form of water vapour?
(A) Transpiration
(B) Photosynthesis
(C) Respiration
(D) Germination
Answer: (A) Transpiration
24. Which statement about photosynthesis and respiration in plants is correct?
(A) Photosynthesis stores energy in food, while respiration releases energy from food
(B) Both processes only occur in roots
(C) Photosynthesis releases energy from food, while respiration produces sunlight
(D) Neither process is important for plants
Answer: (A) Photosynthesis stores energy in food, while respiration releases energy from food
25. Which statement correctly describes the major life processes in plants?
(A) Plants prepare food, respire, transport substances and lose water through transpiration
(B) Plants only prepare food and do not respire
(C) Plants obtain all their food directly from the soil
(D) Plants do not transport water or minerals
Answer: (A) Plants prepare food, respire, transport substances and lose water through transpiration
