OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the pKa of the
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the
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the solubility of the amino acid is maximized.
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the
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the amino acid carries no net electrical charge.
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Detailed explanation-1: -The isoelectronic point or isoionic point is the pH at which the amino acid does not migrate in an electric field. This means it is the pH at which the amino acid is neutral, i.e. the zwitterion form is dominant and an amino acids carries no net charge.
Detailed explanation-2: -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.
Detailed explanation-3: -The isoelectric point or pI of an amino acid is the pH at which an amino acid has a net charge of zero.
Detailed explanation-4: -Solution : Isoelectric point ‘= (2.3 + 9.7)/(2) = 6‘.
Detailed explanation-5: -(A) At isoelectric point an amino acid has highest solubility.