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Question

Which of the following statements is not correct?


A
Proteins are polyamides formed from amino acids
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B
Except glycine, all other amino acids show optical activity
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C
Natural proteins are commonly made up of L-isomer of amino acids
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D
In α amino acids, NH2 and COOH groups are attached to different carbon atoms
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Solution

The correct option is D In $$\alpha-$$ amino acids, $$-{NH}_{2}$$ and $$-COOH$$ groups are attached to different carbon atoms
$$\alpha$$-amino acids are the amino acids which has the amino and carboxyl groups attached to the same carbon atom, usually has an l-configuration, and is the chemical constituent of a protein.
Hence D is incorrect.

Chemistry

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