What solution is used to test for the presence of starch?

Iodine solution

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What happens when iodine solution is added to starch solution?

The iodine solution changes colour.

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What substrate does amylase act on?

Starch

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What type of molecule is an enzyme?

A protein

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What effect does pH have on enzyme activity?

Extreme pH values (very high or low) denature enzymes and slow or stop their activity.

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What does the colour change of the iodine solution indicate?

That starch is still present (blue-black colour) or has been broken down by the amylase (colourless).

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