Question

If some leaves were plucked and then iodine test was performed on them, what would be the result?

Answer 1

Iodine test:

1. The iodine test is used to determine the presence or absence of starch content.
2. The presence of starch is indicated by iodine's blue-black color.

Iodine test for starch:

1. During photosynthesis, chlorophyll in the leaves absorbs light energy.
2. This enables it to convert CO₂ and water into glucose.
3. The glucose is subsequently transferred through the plant's growth components and converted into cellulose, protein, and oils.
4. These are subsequently turned into starch and stored.
5. Starch is a complex carbohydrate that is stored in plant leaves.
6. When the fresh leaves were plucked and the iodine test was performed, the majority of the leaf became blue/black, suggesting the presence of starch since the leaf had recently engaged in photosynthesis.