30.Which nitrogen in the imidazole ring of histidine is the more basic? H2N- -O 一2 #1 A)#1 D)neither is basic E)the histidine N-H is actually acidic both have same basicity Ans: B 31.Which of the following represents how a typical amino acid would mainly exist in basie solution (pH>7)? R C) Page9Page 9 30. Which nitrogen in the imidazole ring of histidine is the more basic? H2N C H CH2 C O OH N N H #2 #1 A) #1 D) neither is basic B) #2 E) the histidine N-H is actually acidic C) both have same basicity Ans: B 31. Which of the following represents how a typical amino acid would mainly exist in basic solution (pH > 7)? A) CO2H R H2N H B) CO2 - R H2N H C) CO2 - R H3N H + D) CO2H R H3N H + E) none of the above Ans: B