Question

A potted plant with variegated leafes was kept in dark for 24 hours and then placed in bright sunlight. Answer the following questions.

1. Which aspect of photosynthesis is being tested in the above diagram?
2. Why was the plant kept in the dark for 24 hours?
3. After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.

Answer 1

1. Photosynthesis requires chlorophyll.
2. To make sure there was no starch on the leaves, the plant was maintained in the dark.
3. Leaf A's green portion turns blue-black and its pale yellow portion turns brown following the starch test. using the solution of iodine.