When asked to set up an experiment to show that ‘light is necessary for photosynthesis’, a student ran to the school garden and set up the experiment using a plant growing in the school garden. The experiment failed. His fellow student made the following suggestions to get success. Student A: Safranin should be used instead of iodine. Student B: The leaf should not be boiled in alcohol to remove chlorophyll before testing for starch. Student C: Transparent paper strip should be used instead of black paper strip. Student D: The plant should be de-starched before starting the experiment. Which student made the right suggestion?

When asked to set up an experiment to show that ‘light is necessary

1.	When asked to set up an experiment to show that ‘light is necessary for photosynthesis’, a student ran to the school garden and set up the experiment using a plant growing in the school garden. The experiment failed. His fellow student made the following suggestions to get success. Student A: Safranin should be used instead of iodine. Student B: The leaf should not be boiled in alcohol to remove chlorophyll before testing for starch. Student C: Transparent paper strip should be used instead of black paper strip. Student D: The plant should be de-starched before starting the experiment. Which student made the right suggestion?
Answer» Student D made the right suggestion because destarching of the leaf by keeping the plant in darkness before starting the experiment is essential.

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