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Amino acids are classified as acidic, ba...

Amino acids are classified as acidic, basic or neutral depending upon the relative number of amino and carboxyl groups in their molecule. Which of the following are acidic-

A

`(CH_(3))_(2) CH - underset(underset(NH_(2))(|))(CH) - COOH`

B

`HOOC - CH_(2) - CH_(2) - underset(underset(NH_(2))(|))(CH) - COOH`

C

`H_(2)N - CH_(2) - CH_(2) - CH_(2) - COOH`

D

`HOOC - CH_(2) - underset(underset(NH_(2))(|))(CH) - COOH`

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The correct Answer is:
B, D
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