A Researcher Finds That Mouse Kidney Cells and Mouse Muscle

question 204

Multiple Choice

A researcher finds that mouse kidney cells and mouse muscle cells both use cAMP as a second messenger in two different signal transduction pathways that result in different cellular responses.Which other condition related to these two pathways would be expected in these cells?

• A) Both cells have the same cell surface receptor for the two pathways.
• B) One cell has a cell surface receptor and the other has an intracellular receptor for these pathways.
• C) Both pathways in the two cells have the same target protein whose activity changes when it binds cAMP.
• D) Both cell types express the adenylate cyclase gene.
• E) One pathway involves cAMP inhibition of a target protein, while the other pathway involves cAMP activation of a target protein.

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