Students investigated samples of amylase from 100 goats. 100 small filter paper discs were each soaked in a different sample of goat amylase. The students tested the activity of these amylase samples using plain paper. Plain paper contains starch. A circle of plain paper was placed into a Petri dish as shown in Fig. 1.1. Iodine solution was used to stain the starch in the plain paper.

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Complete Question:

Students investigated samples of amylase from 100 goats. 100 small filter paper discs were each soaked in a different sample of goat amylase. The students tested the activity of these amlyase samples using plain paper. Plain paper contains starch.

A circle of plain paper was placed into a Petri dish ad shown in the diagram below. Iodine solution was used to stain the starch in the plain paper.

When iodine solution reacts with the starch in the plain paper, what colour would you see?

The colour that would be seen is blue black .

Explanation:

Amylase is an enzyme that is involved in the breaking down or hydrolyses of starch.

When Amylase reacts with iodine, it speeds up the rate of reaction of the hydrolysis of the starch present in the plain paper.

The colour that would be observed is a blue black colour and the starch in the paper would be broken down further more into simpler sugars.