The Absorbance at 625 nm of the phycocyanin solution decreased dramatically when
ID: 1031080 • Letter: T
Question
The Absorbance at 625 nm of the phycocyanin solution decreased dramatically when 0.10 M NaOH was added. Which of the following is a possible explanation for this observation? Remember that the original protein complex was dissolved in pH 7 buffer.
The Hydroxide ion (OH-) deprotonated Aspartic acid and Glutamic acid residues resulting in the loss of negative charge and breaking of the salt bridges.
The Hydroxide ion (OH-) lowered the pH causing the protonation of the Aspartic acid and Glutamic acid residues resulting in the loss of negative charge and breaking of the salt bridges.
The Hydroxide ion (OH-)deprotonated Lysine and Arginine residues resulting in the loss of positive charge and breaking of the salt bridges.
The Hydroxide ion (OH-) deprotonated Lysine and Arginine residues resulting in the loss charge causing an increase in the nonpolar interactions.
The Hydroxide ion caused an increase in the Hydrogen Bonding because it contains -OH.
A.The Hydroxide ion (OH-) deprotonated Aspartic acid and Glutamic acid residues resulting in the loss of negative charge and breaking of the salt bridges.
B.The Hydroxide ion (OH-) lowered the pH causing the protonation of the Aspartic acid and Glutamic acid residues resulting in the loss of negative charge and breaking of the salt bridges.
C.The Hydroxide ion (OH-)deprotonated Lysine and Arginine residues resulting in the loss of positive charge and breaking of the salt bridges.
D.The Hydroxide ion (OH-) deprotonated Lysine and Arginine residues resulting in the loss charge causing an increase in the nonpolar interactions.
E.The Hydroxide ion caused an increase in the Hydrogen Bonding because it contains -OH.
Explanation / Answer
Answer:-
D. The Hydroxide ion (OH-) deprotonated Lysine and Arginine residues resulting in the loss charge causing an increase in the nonpolar interactions.
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