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All of the following statements about the specificity constant of an enzyme are true except which...
Which statement about enzyme catalysis is false? All of the active site amino acids are next...
Which statement about enzyme catalysis is false? All of the active site amino acids are next to each other in the primary sequence. Enzymes speed up reactions by forming specific non-covalent bonds between the enzyme amino acids and the transition state molecule. Some enzymes require other molecules, called cofactors, to carry out chemical reactions. Generally, the most important amino acids for an enzyme's function are those in the active site. Question 6 1 pt When [S] is much more than...
Which of the following statements are true about competitive enzyme inhibitors? a)They cause irreversible covalent modification...
Which of the following statements are true about competitive enzyme inhibitors? a)They cause irreversible covalent modification of the target enzyme. b)They lead to a decrease in apparent Km. c)All of these d)They have significant affinity for the enzyme-substrate complex. e)Their effect on reaction rate can be overcome at high substrate concentrations. f)They lead to a decrease in apparent Vmax. g)None of these
12. Which of the following statements is true of enzyme catalysts? A B C To be...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
1. Protein kinases phosphorylate target enzymes and as a result enzymes become activated or inactivated. Which...
1. Protein kinases phosphorylate target enzymes and as a result enzymes become activated or inactivated. Which of the statements are TRUE? (Multiple answers: You can select more than one option) A. Phosphorylated enzymes behave like competitive inhibitors B The presence of a phosphate acts as a non-competitive inhibitor/activator. No change in Km but significant change in Vmax C. The presence of a phosphate group induces a conformational change that modifies the affinity and catalytic ability of a target enzyme D....
Rodrigo is an enzyme engineer. He wants to know which of four peptide substrates is bound...
Rodrigo is an enzyme engineer. He wants to know which of four peptide substrates is bound most tightly by his engineered enzyme. Which value should he measure and pay attention to? Km KCAT Vo Both A and B kcat, [S], and [E]t Rodrigo's enzyme was assayed with three substrates (A, B, and C). The SAME enzyme concentration used was for each of the three reactions. The results of the three experiments are plotted as Lineweaver-Burke plots below. Considering what you...
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A B. For substrate...
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A B. For substrate A, she determined 30 min that Km 3.0 HM and kcat Jessica graduated and her project has been passed on to you. Unfortunately, Jessica was so busy that she sometimes forgot to record all of the details of an assay in her lab notebook. Your mentor suggests that you try to back calculate some of the missing concentration values. Assume that the enzyme follows...
please help!! please please "Looking at table 6-8 on Enzyme Reactions from the lecture, which achieves...
please help!! please please
"Looking at table 6-8 on Enzyme Reactions from the lecture,
which achieves an excellent specificity constant with a very
favorable kcat (insert answer here) , which with a
favorable Km (insert answer here) , and which with
moderate values for each (insert answer here) ?
(pick from acetyl cholinesterase, B-lactamase, and catalase)"
Question 2: "The units of Vmax are (insert answer
here) and the units of Km are (insert answer
here) (pick from M, M-1, M/s, s/M...
My answers were incorrect. Could I get the answer and explanations please? Which of the following...
My answers were incorrect. Could I get the answer and
explanations please?
Which of the following statements about inhibitors of enzyme-catalyzed reactions is TRUE? Reversible inhibitors bind to either free enzyme or the enzyme-substrate complex but not both. An uncompetitive inhibitor will always bind at the active site. An uncompetitive inhibitor typically affects KM but not k cat. A competitive inhibitor does not affect V max. All of the following are properties of a coenzyme EXCEPT: They tend to be...
QUESTION 28 Among the following statements concerning the enzymes, all correct answers An apoenzyme consists of...
QUESTION 28 Among the following statements concerning the enzymes, all correct answers An apoenzyme consists of a holoenzyme and a.coenzyme Enzymes are biological catalysts that do not affect the reaction equilibrium The rate of reaction depends on the pH The catalytic site is formed of an active site and binding sites The activation energy of the uncatalyzed reaction is greater than the activation energy of the catalyzed reaction QUESTION 29 Which of the following statements are corrects? When the substrate...
Which statement about enzyme catalyzed reactions is not true? a) enzymes form complexes with their substrates....
Which statement about enzyme catalyzed reactions is not true? a) enzymes form complexes with their substrates. b) enzymes lower the activation energy for chemical reactions. c) enzymes change the K eq for chemical reactions. d) many enzymes change shape slightly when substrate binds. e) reactions occur at the "active site" of enzymes, where a precise 3D orientation of amino acids is an important feature of catalysis.
Which statement about enzyme catalysis is false? All of the active site amino acids are next to each other in the primary sequence. Enzymes speed up reactions by forming specific non-covalent bonds between the enzyme amino acids and the transition state molecule. Some enzymes require other molecules, called cofactors, to carry out chemical reactions. Generally, the most important amino acids for an enzyme's function are those in the active site. Question 6 1 pt When [S] is much more than...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
Rodrigo is an enzyme engineer. He wants to know which of four peptide substrates is bound most tightly by his engineered enzyme. Which value should he measure and pay attention to? Km KCAT Vo Both A and B kcat, [S], and [E]t Rodrigo's enzyme was assayed with three substrates (A, B, and C). The SAME enzyme concentration used was for each of the three reactions. The results of the three experiments are plotted as Lineweaver-Burke plots below. Considering what you...
For her undergraduate project, Jessica studied an enzyme that catalyzes the reaction A B. For substrate A, she determined 30 min that Km 3.0 HM and kcat Jessica graduated and her project has been passed on to you. Unfortunately, Jessica was so busy that she sometimes forgot to record all of the details of an assay in her lab notebook. Your mentor suggests that you try to back calculate some of the missing concentration values. Assume that the enzyme follows...
please help!! please please
"Looking at table 6-8 on Enzyme Reactions from the lecture,
which achieves an excellent specificity constant with a very
favorable kcat (insert answer here) , which with a
favorable Km (insert answer here) , and which with
moderate values for each (insert answer here) ?
(pick from acetyl cholinesterase, B-lactamase, and catalase)"
Question 2: "The units of Vmax are (insert answer
here) and the units of Km are (insert answer
here) (pick from M, M-1, M/s, s/M...
My answers were incorrect. Could I get the answer and
explanations please?
Which of the following statements about inhibitors of enzyme-catalyzed reactions is TRUE? Reversible inhibitors bind to either free enzyme or the enzyme-substrate complex but not both. An uncompetitive inhibitor will always bind at the active site. An uncompetitive inhibitor typically affects KM but not k cat. A competitive inhibitor does not affect V max. All of the following are properties of a coenzyme EXCEPT: They tend to be...
QUESTION 28 Among the following statements concerning the enzymes, all correct answers An apoenzyme consists of a holoenzyme and a.coenzyme Enzymes are biological catalysts that do not affect the reaction equilibrium The rate of reaction depends on the pH The catalytic site is formed of an active site and binding sites The activation energy of the uncatalyzed reaction is greater than the activation energy of the catalyzed reaction QUESTION 29 Which of the following statements are corrects? When the substrate...
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