A Mutation That Results in a Single Amino Acid Substitution

question 72

Multiple Choice

A mutation that results in a single amino acid substitution in a region of the enzyme outside of the active site

• A) may alter the ability of a competitive inhibitor to bind to the enzyme.
• B) will almost always destroy the activity of the enzyme.
• C) will often change the substrate specificity of the enzyme.
• D) may alter the optimal pH for the enzyme.

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Definitions:

Synaptic Cleft

The narrow gap between the terminal end of a neuron and the neighboring neuron or muscle cell, through which neurotransmitters are released to transmit signals.

Synaptic Vesicles

Membrane-bound sacs within neurons that store neurotransmitters and release them into the synaptic cleft during neuronal communication.

Neurotransmitters

Chemicals found within the brain that transmit messages between neurons, playing a crucial role in regulating bodily and mental functions.

Agonist

A chemical or drug that binds to receptors in the brain and causes a reaction typically producing a biological response.