Which of the following structures shows the prevalent form of histidine at pH 5? 
A) a
B) b
C) c
D) d
E) none of the above
Correct Answer:
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Q5: At pH 3, how many charged groups
Q6: Which of the following structures shows the
Q7: Which of the following amino acids has
Q8: Which of the following amino acids has
Q9: Serine has a _ side chain; valine
Q11: Disulfide bonds form between two residues of
Q12: Leucine has a _ side chain; glutamate
Q13: At physiological pH, all amino acids have
Q14: Which one of the representations describes the
Q15: When a peptide bond forms, an _
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