An investigation is carried out to determine the factors required for photosynthesis using a potted plant with green leaves.
Before starting the investigation, the plant is kept in a dark room for 72 hours to destarch its leaves.
Following this, two leaves on the plant are prepared as follows:
The plant is then placed under a high-intensity lamp for 24 hours. After this period, both leaves are detached and tested for the presence of starch using iodine solution.
Explain why the plant is kept in a dark room for 72 hours before the investigation.
Predict whether the following regions of the leaves will turn blue-black or remain yellow-brown after being tested with iodine solution:
Describe how to safely remove chlorophyll from a leaf before carrying out the starch test.
