Refer to the Table Below, Which Lists Three Biological Responses

question 195

Multiple Choice

Refer to the table below, which lists three biological responses that result from cAMP-mediated signal transduction pathways.The "yes" and "no" references in the table indicate which cells are capable of displaying the three biological responses. Which statement explains how the same second-messenger molecule, cAMP, can be involved in all of these different pathways?

• A) The cells carrying out these signal transduction pathways are located in different regions of the body.
• B) The cells carrying out these signal transduction pathways do so at different points in time and never simultaneously.
• C) The cells contain different proteins that carry out different functions but respond to the same small molecule.
• D) Each cell has lost the ability to carry out signal transduction pathways other than the few that are most important to its survival.
• E) Each cell is programmed in its DNA to respond only to signals that are most important to its survival.

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