What is the major form for each acidic group of histidine when the pH of the...
What is the major form for each acidic group of histidine when the pH of the solution is 7.00? A. Carboxylic acid; imidazolium; ammonium B. Carboxylate; imidazole; ammonium C. Carboxylate; imidazolium; ammonia D. Carboxylate; imidazolium; ammonium I know its not A or B
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What is the major form for each acidic group of histidine when
the pH of the...
According to the Henderson–Hasselbalch equation, when the pH of a solution of histidine is 1.85, what...
According to the Henderson–Hasselbalch equation, when the pH of a solution of histidine is 1.85, what is the ratio of the carboxylic acid form of the molecule to its conjugate base (the carboxylate form)? [For practice, either use Marvin Sketch or a piece of paper to draw the acid and conjugate base.] 1 or 4?
Which of the following functional groups has a pKa value of 6.14? A. carboxylic acid/carboxylate B....
Which of the following functional groups has a pKa value of 6.14? A. carboxylic acid/carboxylate B. imidazolium/imidazole C. ammonium/ammonia
#1) a) The pK1, pK2, and pKR for the amino acid histidine are 1.8, 9.3, and...
#1) a) The pK1, pK2, and pKR for the amino acid histidine are 1.8, 9.3, and 6.0, respectively. At pH 4.0 would be charged predominantly as follows: A a-carboxylate 0, a-amino +1, imidazole +1, net charge +2 B a-carboxylate +1, a-amino +1, imidazole −1, net charge +1 C a-carboxylate −1, a-amino +1, imidazole 0, net charge 0 D a-carboxylate +1, a-amino 0, imidazole −1, net charge 0 E a-carboxylate −1, a-amino +1, imidazole +1, net charge +1 b) The pK1,...
The charged form of the R-group of histidine (the imidazole ring) is believed to participate in...
The charged form of the R-group of histidine (the imidazole ring) is believed to participate in a reaction catalyzed by an enzyme. If you want to test whether or not the hypothesis is correct, you will need to think about the conditions in which the R-group will be charged. To begin, you decide to calculate at pH 7.0 the percent of the molecules that have a charge on the imidazole ring. What percent of the ring is charged? Please, show...
Under most biological conditions, however, histidine is considered to be a triprotic acid. This is due...
Under most biological conditions, however, histidine is considered to be a triprotic acid. This is due to the pKa of the _________ being ___________. A. nitrogen in the imidazole ring possessing a hydrogen but no charge; much lower than the pH values normally found in a cell B. nitrogen in the imidazole ring possessing a hydrogen but no charge; much higher than the pH values normally found in a cell C. carboxylic acid; much lower than the pH values normally...
a. draw the major form of your drug (wellbutrin) when pH is low (acidic medium) for all acid-base groups draw the major form of drug when pH is high (basic medium) for all acid-base groups.
a. draw the major form of your drug (wellbutrin) when pH is low (acidic medium) for all acid-base groups draw the major form of drug when pH is high (basic medium) for all acid-base groups.
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 r...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
What products will most likely form when a carboxylic acid reacts with an amine at high...
What products will most likely form when a carboxylic acid reacts with an amine at high temperatures, or in the presence of a catalyst? Select the correct answer below: an amide and water a carboxylate salt and an ester a carboxylate salt and an ammonium salt none of the above
Question 84 (1 point) The carbonyl carbon of an aldehyde is is when the silver ion...
Question 84 (1 point) The carbonyl carbon of an aldehyde is is when the silver ion of the Tollens reagent dissociated; precipitated dehydrated; plated reduced; oxidized hydrolyzed; insoluble oxidized; reduced Question 85 (1 point) When an ester is hydrolyzed in the presence of a strong acid catalyst, the products would be amine and carboxylate ion alcohol and carboxylic acid ammonium ion and carboxylic acid alcohol and carboxylate ion ammonium ion and carboxylate ion amine and carboxylic acid Page 86 of...
1) The pKa for the imidazole group in histidine in Papain's catalytic centers is 8.3. What...
1) The pKa for the imidazole group in histidine in Papain's catalytic centers is 8.3. What is the ratio of protonated and deprotonated His-R groups at pH 8.2? a) 5 NH+ / 4 N: b) 1 NH2+ / 1 NH c) 4 N: / 5 NH+ d) 1 NH / 1 NH2+ 2) What is the ratio of protonated vs deprotonated Cysteine sulfhydryl groups in the catalytic center of papain, pKa 3.4, at optimal pH of 6.2? a) 1 S-...
(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...
Question 84 (1 point) The carbonyl carbon of an aldehyde is is when the silver ion of the Tollens reagent dissociated; precipitated dehydrated; plated reduced; oxidized hydrolyzed; insoluble oxidized; reduced Question 85 (1 point) When an ester is hydrolyzed in the presence of a strong acid catalyst, the products would be amine and carboxylate ion alcohol and carboxylic acid ammonium ion and carboxylic acid alcohol and carboxylate ion ammonium ion and carboxylate ion amine and carboxylic acid Page 86 of...
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