Competitive inhibitors are: Select one: O a. bind to another part of an enzyme and making the active site less effective O b. O C. causing the enzyme to change shape. bind to the active site of an enzyme O d. doesn't compete with the substrate
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- Identify the type of enzyme inhibition each of the following inhibitor characteristics is associated with: 1. An inhibitor that decreases enzyme activity by binding to a site on the enzyme other that the active site. 2. An inhibitor that inactivates enzymes by forming a strong covalent bond of the enzyme acitve site.Classify the items as competitive or noncompetitive inhibitors for control of enzyme action. Bind to the allosteric site on the enzyme Not influenced by the concentration of substrate Resemble the substrate Do not resemble thhe substrate Bind to active site of the enzymeWhere does inhibitor binds on enzyme in mixed inhibition? A Allosteric site B Binds on substrate C At active site D Does not bind on enzyme
- An allosteric inhibitor does which of the following? a. Binds to an enzyme away from the active site and changes the conformation of the active site, increasing its affinity for substrate binding. b. Binds to the active site and blocks it from binding substrate. c. Binds to an enzyme away from the active site and changes the conformation of the active site, decreasing its affinity for the substrate. d. Binds directly to the active site and mimics the substrate.All of the following statements about competitive and non-competitive inhibitors are true EXCEPT:(a) Competitive inhibitors are structurally similar to anenzyme’s substrate and bind to the enzyme’s allostericsite.(b) Competitive inhibitors work by competing with a sub-strate for binding to an enzyme’s active site.(c) Noncompetitive inhibitors can bind at sites other thanthe active site of an enzyme, distorting the tertiary pro-tein structure, which alters the shape of the active site,rendering it ineffective for substrate binding.(d) Some noncompetitive inhibitors bind reversibly whilesome bind irreversibly to their enzyme.(e) b and d.In competitive inhibition, increasing concentrations of the inhibitor will have the following effect on the kinetics of the enzyme: A. Km will decrease. B. Vmax will stay the same. C. The reaction will cease because the inhibitor binds irreversibly. D. Km / Vmax will stay the same.
- What is true about a competitive inhibitor of an enzyme? You can choose more than one a. it binds the active site b. it binds an allosteric site c. it physically blocks the substrate d. it warps the active site e. it can be overcome with large amounts of substrateWhich of the following statements about Competitive and noncompetitive inhibition is false? a. A noncompetitive inhibitor does not change the Km of the enzyme. b. A competitive inhibitor does not change the Vmax of the enzyme c. The noncompetitive inhibitor can bind either free enzyme or the enzyme–substrate complex. d.A competitive inhibitor decreases the apparent Km for a given substrate.Which of the following statements about non-competitive inhibitors is true? A) They bind at the active site of the enzyme and block access to the substrate. B) They bind at a location away from the active site. C) They function by changing the shape of the enzyme's active site. D) B and C
- Based on the image attached, what can be concluded from the graph of enzyme activity? A. No enzyme activity recorded at pH 5.0 B. Optimum pH for enzyme activity between pH 5.0 to 5.8 C. The optimum pH for the enzyme is 6.6 D. Decreasing of enzyme activity due to inhibitorConcentration Effect : Substrate Concentration :: Inhibitor’s Effect : _____________________ A. Competitive Inhibition B. Noncompetitive Inhibition C. Enzyme Concentration D. Water Effects One factor affecting enzyme activity is the inhibitor's effect. How would you compare competitive inhibition from non-competitive inhibition? A. Non-competitive inhibition occurs when a molecule similar to the substrate binds to the active site, while competitive inhibition occurs when an inhibitor binds to the enzyme somewhere other than the active site. B. Competitive inhibition occurs when a molecule similar to the substrate binds to the active site, while non-competitive inhibition occurs when an inhibitor binds to the enzyme somewhere other than the active site.In which of the following does an inhibitor bind to an allostericsite on an enzyme?a. competitive inhibitionb. noncompetitive inhibitionc. redox reactionsd. None of the above are correct.
