which of the following is a protein that could not be found in the cell membrane? A non-gated An enzyme of the electron transport chain A glucose transporter. A major histocompatibility Complex (MHC) protein.v The receptor for insulin. Oxygen (O_(2)) gas moves across a cell membrane by simple diffusion. facilitated I transport. a process that moves it from a low concentration to a high concentration. facilitated diffusion. endocytosis.

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which of the following is a protein that could not be found in the cell membrane? A non-gated An enzyme of the electron transport chain A glucose transporter. A major histocompatibility Complex (MHC) protein.v The receptor for insulin. Oxygen (O_(2)) gas moves across a cell membrane by simple diffusion. facilitated I transport. a process that moves it from a low concentration to a high concentration. facilitated diffusion. endocytosis.

Answer 1

* **Which of the following is a protein that could *not* be found in the cell membrane?** An enzyme of the electron transport chain. These enzymes are located within the inner mitochondrial membrane, not the cell membrane. All the other options are membrane proteins: * Non-gated ion channels are integral membrane proteins. * Glucose transporters are transmembrane proteins. * MHC proteins are embedded in the cell membrane. * Insulin receptors are transmembrane proteins.* **Oxygen (

) gas moves across a cell membrane by:** simple diffusion. Oxygen is small and nonpolar, allowing it to freely diffuse across the lipid bilayer without the assistance of any proteins or energy expenditure.

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