Competitive Reversible Enzyme Inhibition – Enzyme Inhibitors
About the Lecture
The lecture Competitive Reversible Enzyme Inhibition – Enzyme Inhibitors by Kevin Ahern, PhD is from the course Enzymes and Enzyme Kinetics.
Included Quiz Questions
What happens to the Km value of an enzyme in the presence of a competitive inhibitor?
- It increases.
- It decreases.
- It remains unaffected.
- It decreases by half.
- It decreases by 10%
Which of the following statement is NOT true regarding competitive reversible enzyme inhibition?
- In competitive reversible enzyme inhibition, the enzyme participates in a new chemical reaction involving the conversion of the inhibitor molecule to the product instead of using the original substrate.
- In a competitive reversible enzyme inhibition, the Vmax and 1/Vmax values do not change in the presence of an inhibitor during an enzymatic reaction.
- At very low substrate concentration, the competitive inhibitor has a more pronounced effect on the rate of enzymatic reaction than at higher substrate concentrations.
- Competitive inhibition of an enzyme is used in the treatment of some cancers.
- The competitive inhibitor resembles the original substrate and hence easily fits into the active site of the enzyme.
Which of the following acts as a competitive inhibitor for the enzyme dihydrofolate reductase?
- Methotrexate
- Dihydrofolate
- Nucleotides
- Penicillin
- Isoleucine
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Author of lecture Competitive Reversible Enzyme Inhibition – Enzyme Inhibitors
Kevin Ahern, PhD
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