Biology

The correct answer is: D.Transport proteins might be converted to carrier proteins.

Explanation:

Cell membranes can respond to signals in several ways, but the conversion of transport proteins into carrier proteins is not a typical response to signaling. Here's why:

A.Transport proteins might open or close: This is a common mechanism. For example, ion channels (a type of transport protein) can open or close in response to signals, allowing ions or molecules to pass through the membrane.

B.Transport proteins might be assembled in the cell membrane: This can happen when vesicles containing transport proteins fuse with the membrane in response to a signal, increasing the number of transport proteins in the membrane.

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