Multiple Choice
Which test uses antibodies to detect specific proteins after separation by gel electrophoresis?
3. Acids and Bases
Organic Chemistry Reactions
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In the context of enzyme-catalyzed reactions, what is a noncompetitive inhibitor?
A
A molecule that increases the rate of reaction by binding to the enzyme
B
A molecule that binds to the active site and prevents substrate binding
C
A molecule that binds to an enzyme at a site other than the active site, reducing its activity regardless of substrate concentration
D
A molecule that competes with the substrate for binding at the active site
Verified step by step guidance1
Understand the role of enzymes in catalyzing reactions: Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to proceed.
Identify the different types of enzyme inhibitors: Enzyme inhibitors are molecules that decrease the activity of enzymes. They can be classified into competitive, noncompetitive, and uncompetitive inhibitors based on their mechanism of action.
Define noncompetitive inhibition: A noncompetitive inhibitor binds to an enzyme at a site other than the active site. This binding changes the enzyme's shape or function, reducing its activity. Importantly, this type of inhibition is not affected by the concentration of the substrate.
Differentiate noncompetitive inhibition from other types: Unlike competitive inhibitors, which bind to the active site and can be outcompeted by high substrate concentrations, noncompetitive inhibitors affect the enzyme regardless of how much substrate is present.
Recognize the impact of noncompetitive inhibitors on enzyme kinetics: In the presence of a noncompetitive inhibitor, the maximum reaction rate (Vmax) decreases, while the Michaelis constant (Km) remains unchanged, as the inhibitor does not affect substrate binding.
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