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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?
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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.
Which one of the following is an end-product of photosynthesis?
Short answer question.
What is the source of energy for photosynthesis?
A potted destarched plant was taken in order to prove that light is necessary for photosynthesis.
(i) What is meant by 'destarched plant'? How can it be destarched?
(ii) Using the destarched plant describe step by step how you would proceed to prove that in the absence of light the leaf cannot manufacture starch.
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.
Name the following:
In-plant cells, carbohydrates are stored in which form.
Name the following:
The chemical substance used to test the presence of starch in the cell of a leaf.
State whether true or false. If false, correct the statement.
Photosynthesis is important in releasing oxygen to keep the atmosphere in balance.
The reactions of photosynthesis make up a biochemical pathway.
What is the end product of light and dark reactions of photosynthesis?
______ food is made in their green stems.
Can the stem of a plant be compared with a street with two-way traffic? Give reason.
