A) \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\]
B) \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\]
C) \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{H}{\mathop{\underset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-NH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-NH-\]
D) \[-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{H}{\mathop{\overset{|}{\mathop{N}}\,}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\]
Correct Answer: A
Solution :
In peptide linkage i.e., ?CONH ? group, the carboxyl group of one amino acid molecules forms an amide by combination with the amino group of the next amino acid molecule with the liberation of water molecule.
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