Which statement is incorrect about peptide bond $- O | | C - ∙ ∙ N H -$ ?

C - N

bond length in proteins is longer than usual bond length of

N -

bond

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Spectroscopic analysis shows planar structure

o - C | | O - N H -

group

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C - N

bond length in proteins is smaller than usual bond length of

C - N

bond

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None of the above

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Solution

The correct option is B $C - N$ bond length in proteins is longer than usual bond length of $N -$ bond
Peptide bond is formed by the reaction of $- C O O H$ group of one amino acid with the $- N H_{2}$ group of another amino acid and represented as
As partial double bond character is found between $C - N$ bond, the length of $C - N$ in protein should be smaller than usual $C - N$ bond.

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