Question

a receptor protein that binds with a signaling molecule and relays the message into the cell by activating other molecules inside an active transport protein that moves molecules across a membrane against their concentration gradient a protein involved in enzymatic activity a glycoprotein that is involved in cell - cell recognition an attachment protein that provides structural support submit previous answers correct signaling proteins are part of signal transduction pathways that transmit external chemical signals into the cell. part c you are working on a team that is designing a new drug. for this drug to work, it must enter the cytoplasm of specific target cells. which of the following would be a factor that determines whether the molecule selectively enters the target cells? the phospholipid composition of the target cells plasma membrane the similarity of the drug molecule to other molecules that are transported into the target cells the nonpolar, hydrophobic nature of the drug molecule the concentration of the drug molecule that is transported in the blood

Explanation:

Cell membranes have specific transport mechanisms. Molecules that are similar in structure to those already transported into the cell are more likely to be selectively taken up. The phospholipid composition affects membrane fluidity but not selective entry as directly. Non - polar hydrophobic nature affects general membrane permeability but not selectivity as much as similarity. The blood concentration affects the amount available but not selectivity.

Answer:

the similarity of the drug molecule to other molecules that are transported into the target cells