Question

Which of the following statements is not correct?

• A. Proteins are polyamides formed from amino acids.
• B. Except glycine, all other amino acids show optical activity
• C. Natural proteins are commonly made up of L – isomers of amino acids.
• D. In $\alpha -$amino acids, $\mathrm { NH } _ { 2 }$ and – COOH group are attached to different carbon atoms.

Answer 1

Answer: (D)

In $\alpha -$amino acids, $\mathrm { NH } _ { 2 }$ and – COOH group are attached to different carbon atoms.

Answer 2

In $\alpha -$amino acids, $- \mathrm { NH } _ { 2 }$ and –COOH groups are attached to the same carbon atoms,