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 ammo acids. \[\underset{\begin{smallmatrix} \\ \text{Amino}\,\text{acid} \end{smallmatrix}}{\mathop{{{H}_{2}}N-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} {{R}_{1}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-CONH}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} {{R}_{2}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix} \\ \text{Peptide}\,\text{bond} \end{smallmatrix}}{\mathop{CONH-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} {{R}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-COOH}}\,\]
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