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प्रश्न
What is meant by a destarched plant? How can it be destarched?
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उत्तर
A destarched plant has no starch present in the leaves and a leaf remains yellowish-brown when tested with iodine during a starch test.
A plant can be destarched by keeping it in the dark for two or three days so that the leaves are free from stored starch.
APPEARS IN
संबंधित प्रश्न
Describe an experiment to prove that sunlight is necessary 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.
Identify the false statements and rewrite them correctly by changing the first or last word only.
Starch produced in a leaf remains stored in it for 2-3 weeks before it is used by other parts of the plant.
In the flowering plants, food is transported in the form of ______.
Enumerate the steps involved in testing a green leaf for the presence of starch.
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.
Name the following:
The chemical substance used to test the presence of starch in the cell of a leaf.
The gas given out during photosynthesis is _____.
Write the reaction for photosynthesis?
______ food is made in their green stems.
