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Photosynthesis Experiments

The process o...

Question

The process of starch removal in plants by keeping it in the dark for a day or two is known as ___.

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Solution

Destarching is the process of removal of starch from the plant by placing it in the dark for 24 to 48 hours.

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Q. The process of keeping a plant in the dark for a day or two is known as ___.

Q. The process of keeping a plant in the dark for one or two days while testing for photosynthesis is known as

Q. A student first keeps a potted plant having green leaves in a dark room for more than 3 days. He then takes out this potted plant from the dark room and places it in bright sunshine for about 3 days.
(a) Which substance present in the green leaves is all used up when the potted plant is kept in a dark room?
(b) What is this process known as?
(c) Which plant process uses up all the above substance from green leaves when the potted plant is kept in the dark room?
(d) Which process does not take place in the green leaves of the plant when it is kept in the dark room?

What will happen if we take a potted plant and keep it in the dark for one full day?

Q. A student is performing an experiment to show that sunlight is necessary for photosynthesis. In the first stage, he keeps a potted plant with green leaves in a dark place for about 3 days. Towards the end of the experiment, he boils one leaf in alcohol before using iodine for testing starch.
(a) Why is the plant kept in a dark place for about 3 days?
(b) Why is the leaf boiled in alcohol before testing for starch with iodine?

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