Which of the following statements is not correct? - Vidyadip

MCQ

Which of the following statements is not correct?

A
Proteins are poly amides formed from aminoacids.
B
Except glycine, all other amino acids show optical activity.
C
Natural proteins are made up of L isomers of amino acids.
D
In amino acids NH₂ and COOH groups are attached to different carbon atoms.

✓

Answer

In amino acids NH₂ and COOH groups are attached to different carbon atoms.

Explanation:

Proteins are poly amides formed from alpha amino acids. Thus, the option A is correct.
Except glycine, all other amino acids show optical activity as they contain chiral carbon atom. Glycine is achiral. Thus, option B is correct.
Natural proteins are made up of L isomers of amino acids. Thus, statement C is correct.
In amino acids NH₂ and COOH groups are attached to same carbon atom.

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