Take a potted plant and destarch it by keeping it in a dark room. Now
select a leaf from this destarched plant and cover a part of it with black
paper. Put this plant back into the sunlight ,and perform an iodine test
on the selected leaf.Now answer the following :
a) How you will remove chlorophyll from the leaf.
b) Which part of the selected leaf will turn blue-black?
c) In which part of the selected leaf photosynthesis does not occur and
why?
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Answer:
a) Pour one cup of rubbing alcohol into the glass. Place the glass in the middle of the pot of hot water. Place the leafin the glass, making sure that it is entirely submerged in the rubbing alcohol. After one hour, the rubbing alcohol should be green, as it now contains the chlorophyll.
b) The part of leaf that contains starch will turn blue black.
The iodine reacts with the starch to give blue black color which is indicative of formation of starch-iodine complex.
c) the fungi are the plants which do not perform the photosynthesis as the fungi didn't have the pigment called chlorophyll that play the main role in the process of photosynthesis.
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