Which of the following represents a peptide chain ?

Options

A. `-overset(H)overset(|)(N)-underset(O)underset(||)(C)-underset(H)underset(|)(N)-overset(|)underset(|)(C)-NH-overset(O)overset(||)(C)-NH-`
B. `-overset(H)overset(|)(N)-underset(O)underset(||)(C)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-`
C. `-overset(H)overset(|)(N)-overset(|)underset(|)(C)-underset(O)underset(||)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-underset(O)underset(||)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-underset(O)underset(||)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-`
D. `-overset(|)underset(|)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-overset(O)overset(||)(C)-underset(H)underset(|)(N)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-overset(H)overset(|)(N)-underset(O)underset(||)(C)-overset(|)underset(|)(C)-overset(|)underset(|)(C)-`

Answer

C

Explanation

The peptide linkage (-NH-CO-) is formed by the condensation of amino acids molecules
`HNHunderset(R)underset(|)(C)H-underset(O)underset(||)(C)OH+H.N H underset(R)underset(|)(C)H-underset(O)underset(||)(C)OH to -HN underset(R)underset(|)(C)H-underset(O)underset(||)(C)-NH underset(R)underset(|)(C)H-underset(O)underset(||)(C)-`
Hence, following structure represents the peptide chain
`-overset(H)overset(|)(N)-overset(|)underset(|)(C)-underset(O)underset(||)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-underset(O)underset(||)(C)-overset(H)overset(|)(N)-overset(|)underset(|)(C)-overset(O)overset(||)(C)-`