A, B and C are three biomolecules. The results of the tests performed on them are given below:

| | Molisch's Test | Barfoed Test | Biuret Test |
|---|---|---|---|
| (A) | Positive | Negative | Negati

Question

A, B and C are three biomolecules. The results of the tests performed on them are given below:

| | Molisch's Test | Barfoed Test | Biuret Test |
|---|---|---|---|
| (A) | Positive | Negative | Negative |
| (B) | Positive | Positive | Negative |
| (C) | Negative | Negative | Positive |

A, B and C are respectively:

Canvas Classes · Accepted Answer

Let's test each compound against the results:
1. Molisch's test identifies carbohydrates. So A and B must be sugars. C is negative, so C is not a sugar.
2. Barfoed test differentiates monosaccharides (positive) from disaccharides (negative or very slow). A is negative, so A is a disaccharide (Lactose). B is positive, so B is a monosaccharide (Glucose or Fructose).
3. Biuret test is positive for proteins. C is positive, so C is a protein (Albumin). Alanine is just an amino acid and gives a negati

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