Which of the Following Activities Would Be Inhibited by a Drug

question 42

Multiple Choice

Which of the following activities would be inhibited by a drug that specifically blocks the addition of phosphate groups to proteins?

• A) binding of G proteins to G protein-coupled receptors
• B) ligand-gated ion channel signalling pathways
• C) adenylyl cyclase activity
• D) receptor tyrosine kinase activity

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Definitions:

Synaptic Vesicle

Membrane-bound sacs in the presynaptic terminals of neurons that store neurotransmitters, which are released into the synaptic cleft in response to an action potential.

Axon

A long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body.

Dendrite

Extensions of a neuron that receive signals from other cells and transmit them toward the cell body.

Myelin Sheath

A fatty layer that surrounds and insulates the axons of many neurons, speeding up the transmission of electrical signals along the nerve.