First slide

Amino acids

Question

Which of the following is a basic, essential amino acid

Easy

A

Threonine
B

Methionine
C

Leucine
D

Histidine

Solution

All the amino acids given are essential amino acids but only Histidine is basic ;
General formula of $α -$ amino acid is $H_{2} N - CH (R) - COOH$ ;
In -R part of histidine there are basic groups, it is a basic and essential amino acid;
-R part of Histidine is

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