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
Homework Answers
Of the following statements the true statements about competitive enzyme inhibitors are,
b)They lead to a decrease in apparent Km.
e)Their effect on reaction rate can be overcome at high substrate concentrations.
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Which of the following statements are true about competitive
enzyme inhibitors?
a)They cause irreversible covalent modification...
Please answer all of those questions 7. Which of the followings is correct about the mechanisms of enzymatic reactions? General acid-base mechanism b. Metal elements mediated mechanism a. Covalent bo...
Please answer all of those questions
7. Which of the followings is correct about the mechanisms of enzymatic reactions? General acid-base mechanism b. Metal elements mediated mechanism a. Covalent bonding mediated mechanism d. All above c. e. None a bove Which of the followings is correct about the meaning of the constant (Km) of Michaelis-Menten equation of enzyme catalyzed reactions? a. The constant and Michaelis-Menten equation is applicable only to the stage of reaction immediately after mixing of substrate(s) with...
Chapter 8. Enzyme Regulation and Inhibition 1. Competitive inhibitors are always of which type? a) allosteric...
Chapter 8. Enzyme Regulation and Inhibition 1. Competitive inhibitors are always of which type? a) allosteric b) irreversible c) reversible d) suicide 2. DIFP is: a) a competitive inhibitor b) an allosteric inhibitor c) a noncompetitive inhibitor d) a suicide inhibitor 3. Competitive inhibitors: a) bind to the active site b) bind to the enzyme-substrate complex c) bind outside the active site and decrease substrate binding d) bind outside the active site and decrease rate of catalysis.
The following observations come from Lineweaver-Burke plots, based on kinetic data generated from a Michaelis/Menton-type enzyme...
The following observations come from Lineweaver-Burke plots, based on kinetic data generated from a Michaelis/Menton-type enzyme (E) that catalyzes the hydrolysis of a peptide substrate (S). All data were generated in the presence of 18.0 μM total enzyme. The enzyme-catalyzed reaction has a Km of 3.00 μM and a Vmax of 2.00 μM/sec. The enzyme-catalyzed reaction in the presence of 15.0 μM of Inhibitor A has an apparent Km of 2.25 μM and an apparent Vmax of 1.50 μM/sec. The...
Questions #1-2 refer to Atorvastatin, which is a competitive inhibitor of the rate limiting step of...
Questions #1-2 refer to Atorvastatin, which is a competitive inhibitor of the rate limiting step of cholesterol biosynthesis. 1. What is the downstream effect of treating cells with this competitive inhibitor? A. Atorvastatin decreases the Vmax of HMG CoA synthase. B. Atorvastatin decreases the KM of HMG CoA synthase. C. Atorvastatin decreases the Vmax of HMG CoA reductase. D. Atorvastatin decreases the KM of HMG CoA reductase. E. Atorvastatin increases the KM of HMG CoA reductase. 2. Mechanistically, how does...
Biochemistry inhibitors! Pls answer 1 through 11 For each of the following items, indicate whether the...
Biochemistry inhibitors! Pls answer 1 through 11
For each of the following items, indicate whether the item pertains to: • Competitive inhibitor . Uncompetitive inhibitor • Noncompetitive inhibitor • Noncompetitive activator • None of the above Choose only one of the above for each item. 1. Binds to the enzyme-substrate complex only 2. Prevents substrate from binding enzyme 3. Forms inactive El or inactive ESI complex 4. When present, Vmax increases 5. When present, Vmax increases and Km decreases 6....
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....
CILI ULIULIS. Question 2 The reason enzyme catalyzed reaction rates have a maximum velocity at high...
CILI ULIULIS. Question 2 The reason enzyme catalyzed reaction rates have a maximum velocity at high substrate concentrations is: Enzymes denature at high substrate concentrations. O None of the answers are correct. The enzyme active sites are saturated. O If enzymes go too fast they make mistakes. O The build-up of product limits the rate of the reaction. Question 3 TILS LICTULUGTCAICONI Question 3 4 pts For a plot of velocity vs. [S] where the maximal velocity of the uninhibited...
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...
All of the following statements about the specificity constant of an enzyme are true except which...
All of the following statements about the specificity constant of an enzyme are true except which one? It is specific to a certain substrate. It is equal to ratio kcat/Km for the substrate, It is equal to the number of times an enzyme can catalyze a reaction per second. It has a maximum value around 10^8 - 10^9 /Ms, at which it is effectively limited by diffusion of the substrate to the active site
QUESTION 27 Which of the following statements is a true conclusion from the kinetics and equilibrium...
QUESTION 27 Which of the following statements is a true conclusion from the kinetics and equilibrium plots shown for two reaction (A and B) shown below? 100% Y х Х 0% Sec Sec A B In the given plots, Y is the reactant and X is the product Reaction B Involves a catalyst only in the forward direction Reaction A Involves a catalyst for the forward direction. Both reactions A and B are unimolecular reversible reactions QUESTION 28 Which of...
Please answer all of those questions
7. Which of the followings is correct about the mechanisms of enzymatic reactions? General acid-base mechanism b. Metal elements mediated mechanism a. Covalent bonding mediated mechanism d. All above c. e. None a bove Which of the followings is correct about the meaning of the constant (Km) of Michaelis-Menten equation of enzyme catalyzed reactions? a. The constant and Michaelis-Menten equation is applicable only to the stage of reaction immediately after mixing of substrate(s) with...
Chapter 8. Enzyme Regulation and Inhibition 1. Competitive inhibitors are always of which type? a) allosteric b) irreversible c) reversible d) suicide 2. DIFP is: a) a competitive inhibitor b) an allosteric inhibitor c) a noncompetitive inhibitor d) a suicide inhibitor 3. Competitive inhibitors: a) bind to the active site b) bind to the enzyme-substrate complex c) bind outside the active site and decrease substrate binding d) bind outside the active site and decrease rate of catalysis.
Biochemistry inhibitors! Pls answer 1 through 11
For each of the following items, indicate whether the item pertains to: • Competitive inhibitor . Uncompetitive inhibitor • Noncompetitive inhibitor • Noncompetitive activator • None of the above Choose only one of the above for each item. 1. Binds to the enzyme-substrate complex only 2. Prevents substrate from binding enzyme 3. Forms inactive El or inactive ESI complex 4. When present, Vmax increases 5. When present, Vmax increases and Km decreases 6....
CILI ULIULIS. Question 2 The reason enzyme catalyzed reaction rates have a maximum velocity at high substrate concentrations is: Enzymes denature at high substrate concentrations. O None of the answers are correct. The enzyme active sites are saturated. O If enzymes go too fast they make mistakes. O The build-up of product limits the rate of the reaction. Question 3 TILS LICTULUGTCAICONI Question 3 4 pts For a plot of velocity vs. [S] where the maximal velocity of the uninhibited...
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...
All of the following statements about the specificity constant of an enzyme are true except which one? It is specific to a certain substrate. It is equal to ratio kcat/Km for the substrate, It is equal to the number of times an enzyme can catalyze a reaction per second. It has a maximum value around 10^8 - 10^9 /Ms, at which it is effectively limited by diffusion of the substrate to the active site
QUESTION 27 Which of the following statements is a true conclusion from the kinetics and equilibrium plots shown for two reaction (A and B) shown below? 100% Y х Х 0% Sec Sec A B In the given plots, Y is the reactant and X is the product Reaction B Involves a catalyst only in the forward direction Reaction A Involves a catalyst for the forward direction. Both reactions A and B are unimolecular reversible reactions QUESTION 28 Which of...
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