Question

The extent and duration of cellular response to a signal depend on:

A. the level of expression of the terminating proteins.
B. All of these choices are correct.
C. the concentration of the signaling molecule in the vicinity of the receptor.
D. the binding affinity of the receptor to the signaling molecule.
E. the level of expression of the signal-transduction proteins.

Answer 1

The extent and duration of cellular response to a signal are influenced by a variety of factors including the expression levels of terminating proteins, signal-transduction proteins, as well as the concentration of the signaling molecule and the receptor's binding affinity. The correct answer is option B

Step-by-step explanation:

The extent and duration of cellular response to a signal depend on multiple factors including protein expression, the concentration of the signaling molecule, the binding affinity of the receptor to the signaling molecule, and the level of expression of signal-transduction proteins. Specifically:

• The level of expression of the terminating proteins helps determine when a signal should be terminated to ensure an appropriate duration.
• The concentration of the signaling molecule in the vicinity of the receptor can influence both the strength and the duration of the signal.
• The binding affinity of the receptor to the signaling molecule affects the sensitivity and specificity of the cellular response.
• The level of expression of the signal-transduction proteins determines how effectively the signal can be amplified and continued within the cell.

Each of these factors contributes to the complexity of signal transduction pathways and the specificity with which different cell types respond to the same signals.The correct answer is option B.