General Science | Biology | Photosynthesis

General Science | Biology | Photosynthesis

Jan 30, 2025 - 15:52 Updated: Jan 30, 2025 - 16:01
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1. Oxygen, which is liberated during photosynthesis comes from

Water
Carbon dioxide
Chlorophyll
Phosphoglyceric acid

2. Which one of the following gases is used by plants in photosynthesis?

Ammonia
Carbon dioxide
Chlorine
Sulphur dioxide

3. Which of the following types of light are strongly absorbed by plants?

Violet and orange
Blue and red
Indigo and yellow
Yellow and violet

4. Most of the oxygen on earth is produced by

Grasses
Algae
Trees
Paddy fields

5. Photosynthesis occurs in

Night
Day and night
Day or night
Only day

6. The process by which plants produce food is called

Carbohydrolysis
Metabolic synthesis
Photosensitization
Photosynthesis

7. The process by which plants synthesize their food is called

Osmosis
Respiration
Photosynthesis
Plasmolysis

8. Photosynthesis occurs in

Nucleus
Mitochondria
Chloroplast
Peroxisome

9. The most active light for photosynthesis is

Violet light
Red light
Blue light
Green light

10. Which light is most effective in photosynthesis?

Red
Blue
Green
Violet

11. What rays of sunlight are mostly utilized by chlorophyll in photosynthesis?

Red
Yellow
Green
Blue

12. Artificial light can

Destroy chlorophyll
Synthesise chlorophyll
Bring about photosynthesis
Not bring about photosynthesis

13. Light energy changes into the chemical energy by which of the following process?

Electrolysis
By photosynthesis
By respiration
By spewing

14. Which one of the following is the process involved in photosynthesis?

Potential energy is released to form free energy
Free energy is converted into potential energy and stored
Food is oxidized to release carbon dioxide and water
Oxygen is taken and carbon dioxide and water vapour are given out

15. Which of the following has the maximum efficiency to convert solar energy into chemical energy?

Chorella
Tiger
Earthworm
Cuscutta

16. Which of the following is not the work of roots?

Photosynthesis
Water absorption
Absorption nutrients
To help the plants

17. When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up or dries because

Water from soil cannot rise to aerial parts
Roots are starved of energy
Tree is infected by the soil microbes
Roots do not receive oxygen for respiration

18. 'Phloem' in plants is mainly responsible for

Transportation of food
Transportation of amino acid
Transportation of oxygen
Transportation of water

19. Which one of the following does not increase the amount of carbon dioxide in carbon cycle on earth?

Respiration
Photosynthesis
Decay of organic matter
Volcanic action