A) amide
B) oligosaccharide
C) polypeptide
D) amino acid
Correct Answer: D
Solution :
Protein is the polymer of amino acids joined together by peptide bonds so, if all the peptide bonds of protein are broken, then the remaining part will be amino acids. \[{{\text{H}}_{\text{2}}}\text{N-}\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix} {{\text{R}}_{\text{1}}} \\ \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,\text{-CONH}\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix} {{\text{R}}_{\text{2}}} \\ \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,\text{-}\underset{\begin{smallmatrix} \text{peptide} \\ \text{bond} \end{smallmatrix}}{\mathop{\text{CONH}}}\,\text{-}\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \text{H} \end{smallmatrix}}{\overset{\begin{smallmatrix} {{\text{R}}_{\text{3}}} \\ \text{ }\!\!|\!\!\text{ } \end{smallmatrix}}{\mathop{\text{C}}}}\,\text{-COOH}\]
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