Question

A leaf of destarched healthy potted plant was covered by black paper strip as shown in Figure I, and kept in sunlight in the morning. In the evening, it was plucked off and tested for the presence of starch by using iodine solution.


The observation is matched with the Figure No.:
(1) II
(2) III
(3) IV
(4) V

Answer 1

The observation in figure II correlates with the observation. The covered part shows yellow colour whereas the exposed parts show blue black colour on testing with iodine. Presence of blue black colour indicates the synthesis of starch in that region.

Hence, the correct answer is option 1.