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4 Terms

1
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What indicator is used to test for the presence of starch?

Lugol’s iodine — indicated by a blue-black color when starch is present.

2
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What indicator is used to test for the presence of protein?

Biuret solution — indicated by a violet (purple) color when protein is present.

3
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What indicator is used to test for the presence of fatty acids (lipids)?

Litmus test — indicated by a color change from blue to pink when fatty acids are present.

4
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What indicator is used to test for the presence of reducing sugars (maltose, sucrose, glucose)?

Benedict’s solution — indicated by a color change from blue to green/orange when reducing sugars are present.