Asked by MANDEEP KAUR SIDHU on Sep 23, 2024
Verified
What is the isoelectric point of lysine within in +/- 1 pH unit?
A) 3
B) 6
C) 9
D) 12
Isoelectric Point
The pH at which a particular molecule carries no net electrical charge, often referenced in the context of amino acids and proteins.
Lysine
An essential amino acid required for protein synthesis and various metabolic processes.
pH Unit
A measure on a scale from 0 to 14 of the acidity or alkalinity of an aqueous solution, where 7 is neutral, values lower than 7 are acidic, and values higher than 7 are basic.
- Acquire knowledge on the subject of isoelectric points (pI) and its impact on the behavior of amino acids in solutions.
Verified Answer
JC
Jacoreion Crockett3 days ago
Final Answer :
C
Explanation :
The isoelectric point (pI) of lysine is approximately 9. This is the pH at which the amino acid has no net charge, as the positively charged amine group (NH3+) is balanced by the negatively charged carboxyl group (COO-). Since the question asks for the +/- 1 pH unit, the answer is C, as lysine's pI would fall within the range of 8 to 10 pH units. Answer choices A (pH 3) and B (pH 6) are well outside of this range, and choice D (pH 12) is also too far from the actual pI.
Learning Objectives
- Acquire knowledge on the subject of isoelectric points (pI) and its impact on the behavior of amino acids in solutions.