In the structure of histidine,
1.the side chain is acidic.
2.both of the nitrogens in the ring structure are basic.
3.one nitrogen in the ring structure is acidic and one is basic.
4.there is one basic nitrogen in the imidazole ring.
5.there is no carboxyl group.
Question 2The amino acid shown below is which of the following:
Question 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 />
1.histidine
2.lysine
3.aspartic acid
4.glycine
5.none of these"
Question 4All of the following amino acids are primary amines except:
1.proline
2.thyroxine
3.glutamic acid
4.lysine
5.glycine