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प्रश्न
(i) Fill in the blanks in the following equations of two chemical reactions:
(a) \[\ce{---+12H2O->[Light energy]C6H12O6 + --- + ----}\]
(b) \[\ce{--- 6O2->[Chlorophyll] 6 --- +6 ---- + Energy}\]
(ii) Name the two processes represented by the above two reactions.
(iii) State any two differences in these processes other than those already indicated in the reactions.
(iv) Which one of these two reactions is the supporter of all life on earth?
उत्तर
(a) \[\ce{6CO2 + 12H2O ->[Sunlight][Chlorophyll] C6H12O6 + 6O2 + 6H2O}\]
(b) \[\ce {C6H12O6 + 6O2 -> 6CO2 + 6H2O} + Energy\]
(ii) Photosynthesis and respiration.
(iii) Difference between Photosynthesis and respiration :
| Photosynthesis | Respiration |
| (a) It is an anabolic process . | (a) It is a catabolic process . |
| (b) It results in a gain in dry mass. | (b) It results in a loss in dry mass . |
(iv) Photosynthesis
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संबंधित प्रश्न
Put a tick (✓ ) against the most appropriate alternative in the following statement.
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Put a tick (✓ ) against the most appropriate alternative in the following statement.
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On a bright sunny day, water weeds growing in an aquarium were actively giving off bubbles of gas. Use this information to answer questions that follow:
- Name the process occurring in the water weed that has resulted in the evolution of these bubbles.
- Of what gas do these bubbles consist?
- Briefly describe the reactions occurring in the leaves of the water weeds leading to the evolution of these bubbles.
- Give an overall balanced chemical equation to represent the process named in (i) above.
A candidate in order to study the importance of certain factors in photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning, she covered one of the leaves with black paper in the center only. She placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
- What aspect of photosynthesis was being investigated?
- Is there any control in this experiment? If so, state the same.
- Why was the plant kept in the dark before the experiment?
- Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
The gas given out during photosynthesis is _____.
The reactions of photosynthesis make up a biochemical pathway.
What is the end product of light and dark reactions of photosynthesis?
Can the stem of a plant be compared with a street with two-way traffic? Give reason.
The raw material which is reduced during photosynthesis is ______.
Name two raw materials for photosynthesis.
Name four essentials for photosynthesis.
