BIOLOGY
AMINO ACIDS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
the pH where the molecule carries no net electric charge
|
|
|
the pH where the molecule carries positive electric charge
|
|
|
the pH where the molecule carries negative electric charge
|
|
|
None of the above
|
Detailed explanation-1: -The isoelectric point (pI) is defined as the pH at which the protein/peptide has a net of charge zero.
Detailed explanation-2: -The isoelectric point of an amino acid is defined as. the pH where the molecule carries no net electric charge.
Detailed explanation-3: -The isoelectric point (pI) is defined as the pH at which the protein has no net charge.
Detailed explanation-4: -The net charge on a protein is zero at the isoelectric point (pI), positive at pHs below the pI, and negative at pHs above the pI.
Detailed explanation-5: -The isoelectric point (pI) is the pH value at which the molecule carries no electrical charge. The concept is particularly important for zwitterionic molecules such as amino acids, peptides, and proteins. For an amino acid, the isoelectric point is the average of pKa values for the amine and the carboxyl group.