Question

Consider the following amino acids.
a. Alanine
b. Glutamic acid
c. Valine
d. Lysine
e. Histidine
Which of the following given amino acids will have net zero charge at their isoelectric pH respectively?

• A. a and c only
• B. b and d only
• C. b and e only
• D. a, b, c, d and e

Answer 1

The correct option is D a, b, c, d and e

D. a, b, c, d and e

Solution: Isoelectric point is the value of pH at which all the amino acids have net charge zero. Here all the amino acids will have net zero charge at their isoelectric pH.

So the correct answer is "a, b, c, d and e".