Question

how would you test the presence of starch in leaves​

Answer 1

by using iodine

Starch is stored in the stomata of the chloroplasts and in the cytoplasm of leaves. When plants use the process of photosynthesis to create their own food, in the form of sugar, they also have a way to store excess sugar that is not used right away.

Answer 2

Hey mate!!

here's your answer...

»The presence of starch in leaves can be tested by Iodine test. When we remove chlorophyll from leaf by boiling it in alcohol and then put two drops of iodine solution, its colour change to blue indicates the presence of starch.

Steps to test it :

• Take two potted plants of the same kind.
• Keep one in the dark (or in a black box) for 72 hours and the other in the sunlight.
• Take one leaf from each of the plants.
• Put few drops of iodine solution on each of the leaves.
• The leaf kept in the sunlight will turn blue-black due to presence of starch. The leaf kept in the dark will not turn blue-black because of absence of starch.

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