Lab 2 Chemistry experiments

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5 Terms

1
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Iodine Test

Detects polysaccharide/starch presence

Yellow- Brown = negative

Blue- Black= positive

2
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Benedict’s Test

Detects reducing sugars/ monosaccharides and some disaccharides

Blue= negative

Green to Yellow= weak positive

Orange to Brick Red= strong positive

3
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Sudan IV Dye Test

Detects lipids/ fats

Dark Red- Brown= negative

Bright “fire engine” Red= positive

4
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Ninhydrin Test

Detects amino acids

Colorless= negative
Yellow= positive for proline only

Purple= positive

5
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Biuret Test

Detects polypeptides/ proteins

Blue= negative

Yellow= positive for cysteine only

Pink= positive for small polypeptides

Violet= positive for proteins