Question

What would happen if:
a) a fresh green leaf of a plant receiving enough sun light is treated
with iodine solution?
b) a fresh green leaf of a plant placed in dark for 2-3 days is treated
with iodine solution?
c) variegated leaves (leaves with some green portions and some
non-green portions) are treated with iodine solution?

Answer 1

Answer:

The green leaves contain chlorophyll and, in the presence of sunlight, carry out photosynthesis, thus forming starch. When dipped in iodine solution, the iodine on these green leaves will turn blue-black because of how iodine reacts with amylose in the plant.

Answer 2

Answer:

a) The green leaves contain chlorophyll and, in the presence of sunlight, carry out photosynthesis, thus forming starch. When dipped in iodine solution, the iodine on these green leaves will turn blue-black because of how iodine reacts with amylose in the plant.