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Photosynthesis

What should b...

Question

What should be added to a leaf to break down chlorophyll?

A

Diluted iodine solution

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B

Glycerine

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C

Alcohol

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D

Boiled water

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Solution

The correct option is C Alcohol
Alcohol breaks down chlorophyll and decolourises the leaf.

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Q. To remove chlorophyll, the leaf should be boiled in _______.

Q. In the experiment to demonstrate that starch is made as food by the process of photosynthesis, the plucked leaf is first boiled in water for about 3 to 5 minutes in order to :

(1) remove chlorophyll from leaf cells

(2) break down the cell membranes of leaf cells

(3) soften the brittle leaf

(4) convert starch into glucose so that is can be tested easily

Chlorophyll in a leaf is required for

(a) breaking down water into hydrogen and oxygen.

(b) emitting green light.

(c) trapping light energy.

(d) storing starch in the leaves.

Q. Statement 1: When iodine solution is added to the leaves, a change in colour to blue indicates the presence of starch.

Statement 2: Chlorophyll is removed by boiling the leaf in water or alcohol.

To remove chlorophyll, the leaf is boiled into:

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