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Questions and Answers
Which of the following is NOT a characteristic of allosteric regulation of enzymes?
Which of the following is NOT a characteristic of allosteric regulation of enzymes?
- Exhibits sigmoidal kinetics
- Leads to a linear relationship between substrate concentration and enzyme activity (correct)
- Involves a regulatory subunit that is separate from the catalytic subunit
- Allows for positive feedback regulation
In the case of uncompetitive inhibition of an enzyme, the inhibitor:
In the case of uncompetitive inhibition of an enzyme, the inhibitor:
- Binds to the enzyme-substrate complex, decreasing the Vmax (correct)
- Binds to the enzyme, decreasing the Km
- Binds to the substrate, preventing it from binding to the enzyme
- Binds to the enzyme, decreasing the Vmax
Which type of enzyme inhibition results in a decrease in the Km of the enzyme?
Which type of enzyme inhibition results in a decrease in the Km of the enzyme?
- Noncompetitive inhibition
- Uncompetitive inhibition
- Allosteric inhibition
- Competitive inhibition (correct)
Which of the following is a characteristic of noncompetitive inhibition of an enzyme?
Which of the following is a characteristic of noncompetitive inhibition of an enzyme?
What is the purpose of allosteric regulation in enzymes?
What is the purpose of allosteric regulation in enzymes?
Which of the following is a consequence of positive allosteric regulation of an enzyme?
Which of the following is a consequence of positive allosteric regulation of an enzyme?
What is the primary factor that regulates the activity of the enzyme phosphofructokinase (PFK) in the glycolysis pathway?
What is the primary factor that regulates the activity of the enzyme phosphofructokinase (PFK) in the glycolysis pathway?
How does the binding of ATP to phosphofructokinase (PFK) affect the enzyme's activity?
How does the binding of ATP to phosphofructokinase (PFK) affect the enzyme's activity?
Which of the following statements about the effects of citrate on phosphofructokinase (PFK) activity is correct?
Which of the following statements about the effects of citrate on phosphofructokinase (PFK) activity is correct?
Which type of enzyme inhibition is exhibited by the binding of ADP and AMP to phosphofructokinase (PFK)?
Which type of enzyme inhibition is exhibited by the binding of ADP and AMP to phosphofructokinase (PFK)?
How does the binding of citrate to phosphofructokinase (PFK) affect the enzyme's activity?
How does the binding of citrate to phosphofructokinase (PFK) affect the enzyme's activity?
Which of the following statements about the regulation of phosphofructokinase (PFK) activity is correct?
Which of the following statements about the regulation of phosphofructokinase (PFK) activity is correct?
Which of the following statements about competitive inhibitors is correct?
Which of the following statements about competitive inhibitors is correct?
What is the effect of a non-competitive inhibitor on an enzyme reaction?
What is the effect of a non-competitive inhibitor on an enzyme reaction?
Which of the following statements about uncompetitive inhibitors is true?
Which of the following statements about uncompetitive inhibitors is true?
Which of the following factors can affect enzyme activity?
Which of the following factors can affect enzyme activity?
What is the difference between allosteric regulation and inhibition in enzymes?
What is the difference between allosteric regulation and inhibition in enzymes?
What is the relationship between the Michaelis constant (Km) and substrate affinity?
What is the relationship between the Michaelis constant (Km) and substrate affinity?
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