Multiple Choice
If acetylcholinesterase became mutated and nonfunctional, which of the following would most likely occur?
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7. Enzyme Inhibition and Regulation
Enzyme Inhibition
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Which of the following would be unlikely to contribute to the substrate specificity of an enzyme?
A
The concentration of product in the reaction mixture
B
Hydrogen bonding interactions between the enzyme and substrate
C
The shape and charge distribution of the enzyme's active site
D
The presence of specific amino acid residues involved in substrate binding
Verified step by step guidance1
Understand the concept of substrate specificity: Substrate specificity refers to the ability of an enzyme to selectively bind and catalyze a reaction with a specific substrate. This is determined by the structural and chemical compatibility between the enzyme's active site and the substrate.
Analyze the factors contributing to substrate specificity: Substrate specificity is influenced by factors such as hydrogen bonding interactions, the shape and charge distribution of the active site, and the presence of specific amino acid residues that interact with the substrate.
Evaluate the role of hydrogen bonding: Hydrogen bonding interactions between the enzyme and substrate help stabilize the enzyme-substrate complex, contributing to specificity.
Consider the shape and charge distribution of the active site: The three-dimensional structure and charge distribution of the enzyme's active site are critical for recognizing and binding the correct substrate.
Assess the relevance of product concentration: The concentration of product in the reaction mixture does not directly influence substrate specificity, as specificity is determined by the enzyme's ability to bind the substrate, not the product.
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