Question

WHAT OBSERVATION DO YOU EXPECT IF YOU DO NOT BOIL A LEAF IN ALCOHOL BEFORE PERFORMING THE STARCH TEST ON IT?
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Answer 1

here is your answer;

The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch.

This procedure kills a leaf, disrupts the cell membranes and softens the cuticle and cell walls. This makes it possible to extract the chlorophyll with hot ethanol and also allows the iodine solution to penetrate the cells and react with any starchpresent.In your experiment, you took a leaf that had been allowed to do photosynthesis, youboiled it to kill it and remove the waxy cuticle, then placed it in alcohol to remove the chlorophyll and other plant pigments. Once the pigments have been removed, the leaf is treated with iodine solution

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Answer 2

Answer:

alcohol removes chlorophyll and alcohol removes the green colour present in leaf then we start to perform our starch test.

but if we do not boil leaf in alcohol the chlorophyll and green colour in leaf will not be removed from which we can't perform the starch test.

Explanation:

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