Question

Will a leaf taken from a potted plant kept in a dark room for a few days turn blue black when tested for starch? Give reasons for your answer.

Answer 1

Your answer is:

No

When the leaf was kept in dark room it used all the starch that was reserved for various activities of the plant. Further, the leaves were not able to synthesize starch in absence of sunlight. So, the leaf will not turn blue back when tested for starch.