Interpretation:
The number of peptide bonds present in peptide having five amino acids should be calculated.
Concept introduction:
Proteins are
They polymerise by peptide linkage to form dipeptide, oligopeptide and polypeptide molecules. Each peptide bond formation is a condensation reaction that occurs with the elimination of water molecule.
Answer to Problem 48A
Four peptide bonds (amide groups −CONH2) are present in a peptide having five amino acids.
Explanation of Solution
A
The structure of peptide bond:
The structure having five amino acids is:
In above structure, five different amino acids are present due to the presence of four peptide bonds. Peptide bonds are identified by the bonding present between carboxyl group of one amino acid and amino group of another amino acid. Four amide groups are present in the given structure and the amino acids present on end of the chain (both side) is not bonded to any group.
Thus, four peptide bonds (amide groups −CONH2) are present in a peptide having five amino acids.
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