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JEE Mains · Chemistry · STD 12 - 10. Biomolecules

\(A, B\) and \(C\) are three biomolecules. The results of the tests performed on them are given below \(\begin{array}{|c|c|c|c|}\hline {} &\text { Molisch's Test} & {\text { Barfoed Test}} & {\text { Biuret Test}} \\ \hline \text { A} & { Positive } & {\text { Negative }} & {\text { Negative }} \\ \hline \text { B } & {\text { Positive }} & {\text { Positive }} & {\text { Negative }} \\ \hline \text { C } & {\text { Negative }} & {\text { Negative }} & {\text { Positive }} \\ \hline\end{array}\) \(A, B\) and \(C\) are respectively

  1. A \(A =\) Glucose, \(B =\) Fructose, \(C =\) Albumin
  2. B \(A =\) Lactose, \(B =\) Fructose, \(C =\) Alanine
  3. C \(A =\) Lactose, \(B =\) Glucose, \(C =\) Alanine
  4. D \(A =\) Lactose, \(B =\) Glucose, \(C =\) Albumin
Verified Solution

Answer & Solution

Correct Answer

(D) \(A =\) Lactose, \(B =\) Glucose, \(C =\) Albumin

Step-by-step Solution

Detailed explanation

Alanine does not show Biuret test because Biuret test is used for deduction of peptide linkage & alanine is amino acid. Albumine is protein so have paptide linkage so it gives positive Biuret test. Positive Barfoed test is shown by monosaccharide but not disaccharide. Positive…