Question
Chemistry Question on Biomolecules
Lysine is least soluble in water in the pH range
A
3 to 4
B
5 to 6
C
6 to 7
D
8 to 9
Answer
8 to 9
Explanation
Solution
Lysine is a basic amino acid, hence its pH (isoelectric point) lies in the basic range (8 to 9). At this pH amino acid has the least solubility in water and this property is exploited in the separation of different amino acids obtained from the hydrolysis of protein.