1.

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

Answer»

`(CH_3)_(2)(CH)-underset(NH_2)underset(|)CH-COOH`
`HOOC-CH_2-CH_2-underset(NH_2)underset(|)(CH)-COOH`
`H_(2)N-CH_(2)-CH_2-CH_2-COOH`
`HOOC-CH_2-underset(NH_2)underset(|)(CH)-COOH`

Solution :Optins (b and d) have two `-COOH` and one `-NH_(2)` group and hence are acidic.


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