question_answer

  In the experiment, light is essential for photosynthesis leaf of the plant is covered with a strip as shown alongside.      The leaf is plucked, strip is removed from it and putted in iodine solution. It is observed that uncovered portion turns blue black. Whereas covered does not with iodine solution why is it so?

Answer:

                  Photosynthesis occurred at uncovered portion results in the formation of starch which gives blue-black colour with iodine solution.