TOPIC: NUTRITION IN PLANTS

DATE: NAME:______________________________

1. Which of the following processes enables green plants to synthesize their own food?
a) Transpiration
b) Photosynthesis
c) Respiration
d) Translocation
2. A student conducted an experiment by keeping a potted plant in a dark room for 72 hours. Then, one
leaf was covered with black paper and the plant was placed in sunlight. Which step is being tested
here?
a) Oxygen release during respiration
b) Carbon dioxide uptake in photosynthesis
c) Requirement of sunlight in photosynthesis
d) Transpiration in leaves
3. Which of the following is the ultimate source of energy for autotrophic nutrition in green plants?
a) Soil nutrients
b) Water
c) Sunlight
d) Chloroplast
4. What will happen if a plant is kept in a completely dark place for a few days?
a) It will grow faster
b) It will perform more photosynthesis
c) It will stop making food
d) It will absorb more water
5. Which of the following is not required for photosynthesis to occur in green plants?
a) Chlorophyll
b) Sunlight
c) Carbon dioxide
d) Oxygen
6. A student boiled a leaf in alcohol and then added iodine solution to it. This test is used to check the
presence of:
a) Protein
b) Starch
c) Fat
d) Cellulose
7. Why are stomata important for the process of photosynthesis?
a) They help to absorb water
b) They exchange gases like CO₂ and O₂
c) They produce food
d) They store starch
8. Which part of the plant cell contains the pigment necessary for photosynthesis?
a) Mitochondria
b) Nucleus
c) Chloroplast
d) Cytoplasm
9. Which of the following best describes autotrophic nutrition?
a) Organisms obtain food by consuming other organisms
b) Organisms break down complex food into simpler substances
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 c) Organisms prepare their own food using inorganic substances
d) Organisms depend on decaying matter for food
10. Which of the following equations correctly represents the process of photosynthesis?
a) CO₂ + H₂O → C₆H₁₂O₆ + O₂ + H₂O (in presence of sunlight and chlorophyll)
b) O₂ + H₂O → CO₂ + C₆H₁₂O₆+ H₂O
c) H₂O + O₂ → CO₂ + Sunlight+ C₆H₁₂O₆ (in presence of chlorophyll)
d) C₆H₁₂O₆ → CO₂ + H₂O+H₂+ O₂ (in presence of sunlight and chlorophyll)
11. What is the main product formed during photosynthesis?
a) Oxygen
b) Water
c) Glucose
d) Carbon dioxide
12. Which factor directly affects the rate of photosynthesis in plants?
a) Amount of nitrogen in soil
b) Intensity of sunlight
c) Size of leaf
d) Length of roots
13. Which cells control the opening and closing of stomata?
a) Palisade cells
b) Xylem cells
c) Guard cells
d) Mesophyll cells
14. Which gas is taken in during photosynthesis?
a) Oxygen
b) Nitrogen
c) Hydrogen
d) Carbon dioxide
15. What is the function of chlorophyll in photosynthesis?
a) Absorb water
b) Absorb sunlight
c) Store glucose
d) Transport minerals
16. What happens to the oxygen produced in photosynthesis?
a) Used in plant respiration
b) Stored in roots
c) Released into the atmosphere
d) Absorbed by soil
17. In which part of the plant does maximum photosynthesis occur?
a) Root
b) Stem
c) Leaf
d) Flower
18. What do we call organisms that make their own food?
a) Heterotrophs
b) Saprotrophs
c) Autotrophs
d) Parasites
19. A plant is kept in continuous red light. What might happen to its photosynthesis?
a) It increases indefinitely
b) Initially increases and then reduces drastically
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 c) It continues at a slower rate
d) It stops completely
20. In a desert plant like cactus, photosynthesis occurs in:
a) Leaves
b) Stems
c) Roots
d) Flowers
21. Which of these is not a raw material for photosynthesis?
a) CO₂
b) H₂O
c) Sunlight
d) O₂
22. Which structure helps in transport of water to leaves for photosynthesis?
a) Phloem
b) Stomata
c) Xylem
d) Root hairs
23. Which of the following shows autotrophic mode of nutrition?
a) Fungi
b) Algae
c) Amoeba
d) Mushroom
24. Which condition is least favorable for photosynthesis?
a) Bright light
b) Presence of chlorophyll
c) Lack of carbon dioxide
d) Warm temperature
25. Which process occurs in both plants and animals?
a) Photosynthesis
b) Respiration
c) Transpiration
d) Chlorophyll formation
26. What is the main source of carbon for green plants?
a) Soil
b) Air
c) Sunlight
d) Water
27. What do variegated leaves help demonstrate in photosynthesis experiments?
a) Role of roots
b) Role of light
c) Role of water
d) Role of chlorophyll
28. A student places a plant in sunlight after keeping it in dark for 2 days. What test can confirm
photosynthesis occurred?
a) Biuret test
b) Iodine test
c) Benedict’s test
d) Molisch’s test
29. The water required for photosynthesis is absorbed by:
a) Leaves
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 b) Flowers
c) Roots
d) Stomata
30. Which of the following plants obtains nutrition through parasitism?
a) Algae
b) Cuscuta
c) Rose
d) Mango
31. Which of the following organisms shows saprophytic mode of nutrition?
a) Cuscuta
b) Mucor
c) Mango
d) Amoeba
32. Saprophytes obtain their nutrition from:
a) Living tissues of host plants
b) Sunlight and carbon dioxide
c) Dead and decaying organic matter
d) Ingesting other organisms
33. Why are saprophytes important in the ecosystem?
a) They convert solar energy into food
b) They help in reproduction of plants
c) They decompose organic matter and recycle nutrients
d) They store food for other organisms
34. In parasitic mode of nutrition, the parasite:
a) Makes its own food
b) Lives independently
c) Lives on or inside a host and derives nutrients from it
d) Depends only on sunlight and water