Multiple Choice
The imidazole side chain of histidine can function as either a general acid catalyst or a general base catalyst because
(I) the imidazole group has a pKa in the physiological pH range.
(II) in the physiological pH range,the nitrogen in the ring can be easily protonated/deprotonated.
(III) one guanidino group is protonated,and the other is deprotonated at physiological pH.
(IV) the imidazole group is a strong reducing agent at physiological pH.
A) I,II
B) I
C) II,IV
D) II,III
E) IV
Correct Answer:
Verified
Correct Answer:
Verified
Q10: In the lysozome reaction the D ring
Q11: If you add enzyme to a solution
Q12: Which of the following amino acid residues
Q13: Serine proteases use _ to catalyze the
Q14: Enzymes that bind reaction transition states with
Q16: Matching<br><br>-For efficient nucleophilic catalysis,a group such as
Q17: Which of the following would result in
Q18: Research scientists are trying to clone a
Q19: Matching<br><br>-Some serine proteases are believed to have
Q20: Which of the following amino acid residues