Suppose scientists discover a new extracellular protein that causes increases in cell size.In order to investigate whether cell surface receptors are involved in binding this protein, they could
A) increase the concentration of the protein outside the cell.
B) remove the protein from the extracellular medium.
C) measure enzymatic activity within the cell.
D) apply inhibitors known to block specific membrane receptors.
E) measure the growth of the cell over time.

Question

Quizplus · Accepted Answer

Applying inhibitors known to block specific membrane receptors is the best choice to investigate whether cell surface receptors are involved in binding this protein. By doing this, the researchers can observe if the cell's growth response to the protein is affected. If the cell's growth response is inhibited by the inhibitors, it suggests that a specific receptor is involved in the binding of the protein.

Suppose Scientists Discover a New Extracellular Protein That Causes Increases