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20/10/2021 6:30 pm
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Given alongside is a sketch of a leaf partially covered with black paper and which is to be used in the experiment to show that light is compulsory for the process of photosynthesis. At the end of the experiment, which one of the leaf parts labelled I, II and III will become blue black when dipped in iodine solution?
(1) I only
(2) II only
(3) I and III
(4) II and III
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20/10/2021 6:32 pm
Correct answer: (3) I and III
Explanation:
According to the above sketch, parts I and III will become blue black when dipped in iodine. It is because the starch will be synthesized in parts I and III and whereas it will not be synthesized in part II.