Asked by Dylon Faragure on Sep 23, 2024
Verified
Which of the following amino acids has its isoelectric point at the highest pH?
A) glycine
B) aspartic acid
C) valine
D) arginine
E) methionine
Isoelectric Point
The pH at which a molecule or surface carries no net electrical charge, important in protein purification and characterization.
Highest pH
Refers to the most alkaline condition in a set of samples, indicating the lowest concentration of hydrogen ions.
Amino Acids
Organic compounds containing both an amino group and a carboxylic acid group, serving as the building blocks of proteins.
- Familiarize oneself with the concept of isoelectric points (pI) and comprehend its importance to the behavior of amino acids in solutions.
Verified Answer
RB
Raychel Begay5 days ago
Final Answer :
D
Explanation :
Arginine has a basic side chain with a pKa of approximately 12.5, making it the most basic amino acid. Therefore, its isoelectric point (pI) will be at a higher pH compared to the other amino acids listed.
Learning Objectives
- Familiarize oneself with the concept of isoelectric points (pI) and comprehend its importance to the behavior of amino acids in solutions.