State the function of the following:
Ethanol in iodine test:

[1 Mark]

Removes chlorophyll from the leaf

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Identifies the presence of starch

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Identifies the presence of starch

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Destarches the leaf

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Solution

The correct option is A Removes chlorophyll from the leaf
When the leaf is boiled in ethanol, it loses chlorophyll content and becomes discoloured. The discoloured leaf is treated with iodine solution to confirm the presence of starch in the green portion of the leaf.

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Mention two functions of iodine in the body. [2 MARKS]

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