Question

Iodine is used to detect the presence of starch in cells, because it stains starch deep blue. If an animal cell and a plant cell are treated with iodine, what would be observed?

Answer 1

The correct answer will be-

1. Animal cell- not stained blue

2. Plant cell- stained blue

Step-by-step explanation:

Iodine test is performed to test the presence of starch in a solution as it forms a compound with starch which appears blue in color.

Since in animals, the carbohydrate is formed in the form of glycogen to which iodine reacts but does not develop blue color instead develops brownish color. In plants, the stored form of sugar is starch which reacts with iodine and forms blue colored solution.

Thus, animal cell- is not stained blue while plant cell is stained blue.