Why isn't cellular energy required for the passenger molecule to be carried across the cell membrane by the carrier molecule?

Because of facilitated diffusion (, which nutralizes it from a higher to a lower concentration.)

Answered by armanicarden1 | 2024-06-10

Cellular energy is not required for the transport of certain molecules by carrier proteins because this process can happen through passive transport, which relies on concentration gradients. Carrier proteins facilitate the movement of molecules from areas of higher concentration to lower concentration without using energy. Thus, the entire process is driven by natural physical forces rather than cellular energy expenditure.
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Answered by Anonymous | 2024-12-26