An experiment is designed to investigate the conditions required for photosynthesis using a plant with variegated leaves (where the outer margin is white and the center is green).
Before the experiment, the plant is destarched by keeping it in a dark cupboard for 48 hours.
After destarching, two leaves on the plant are treated as follows:
The plant is then placed under bright light for 24 hours, after which both leaves are tested for the presence of starch using iodine solution.
Explain why the plant must be destarched before the experiment begins.
Predict whether the following regions of the leaves will turn blue-black or remain yellow-brown after the iodine test:
Describe how to safely remove chlorophyll from a leaf before testing it with iodine solution.
