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?

Amino acids are classified as acidic, basic or netural depending upon the relative number of amino and carboxyl groups in their molecule. Which of following are acidic ? (i) (CH_(3))_(2)OH-underset(NH_(2))underset(|)CH-COOH (ii) HOOC-CH_(2)-CH_(2)-underset(NH_(2))underset(|)CH-COOH (iii) H_(2)N-CH_(2)-CH_(2)-CH_(2)-COOH (iv) HOOC-CH_(2)-underset(NH_(2))underset(|) CH-COOH

Amino acids are classified as acidic, basic or netural depending upon the relative number of amino and carboxyl groups in their molecule. Which of following are acidic ? (i) (CH_(3))_(2)OH-underset(NH_(2))underset(|)CH-COOH (ii) HOOC-CH_(2)-CH_(2)-underset(NH_(2))underset(|)CH-COOH (iii) H_(2)N-CH_(2)-CH_(2)-CH_(2)-COOH (iv) HOOC-CH_(2)-underset(NH_(2))underset(|) CH-COOH

Amino acids can be acidic, basic or neutral.