COMEDK · Chemistry · 30. Biomolecules
A small segment of a polypeptide gave on complete hydrolysis 3 molecules of alanine, 2 molecules of glycine and 3 molecules of cysteine. What is the number of peptide linkages in the segment of the polypeptide?
- A \(6\)
- B \(8\)
- C \(5\)
- D \(7\)
Answer & Solution
Correct Answer
(D) \(7\)
Step-by-step Solution
Detailed explanation
Total number of amino acid molecules obtained on complete hydrolysis = \(3 + 2 + 3 = 8\). In a linear polypeptide chain, the number of peptide linkages is equal to the total number of amino acid residues minus one. Number of peptide linkages = \(8 - 1 = 7\). Answer: \(7\)
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