question_answer

Which statement is incorrect about peptide bond?

A) C-N bond length in proteins is longer than usual C-N bond length

B) Spectroscopic analysis shows planar structure of \[-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-NH-\] bond

C) C-N bond length in proteins is smaller than usual C-N bond length

D) None of these

Correct Answer: C

Solution :

[c] Due to resonance, \[C-N\] bond acquires some double bond character, hence shorter in length