What is the role of G proteins in signal transduction?
Understand the Problem
The question is asking about the function of G proteins in the process of signal transduction. It is providing multiple-choice options that describe various roles G proteins might play in cellular signaling.
Answer
G proteins act as molecular switches transmitting signals from GPCRs to intracellular pathways.
G proteins function as molecular switches inside cells. They transmit signals from G protein-coupled receptors (GPCRs) to further intracellular pathways, modulating processes like transcription, enzyme regulation, and ion channel operation.
Answer for screen readers
G proteins function as molecular switches inside cells. They transmit signals from G protein-coupled receptors (GPCRs) to further intracellular pathways, modulating processes like transcription, enzyme regulation, and ion channel operation.
More Information
G proteins are essential for the specificity and amplification of cellular responses to a wide range of external stimuli. They are involved in many physiological processes, including sensory perception like vision, taste, and smell, as well as growth and hormonal responses.
Tips
A common mistake is confusing GPCRs with G proteins. GPCRs are the receptors that activate G proteins, which then propagate the signal within the cell.
Sources
- G protein - Wikipedia - en.wikipedia.org
- What is the role of G proteins in signal transduction? - Quora - quora.com
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