Why do passenger molecules need assistance from carrier molecules?

(Note: A carrier molecule is a molecule in a cell that helps a normal molecule, known as a passenger molecule, enter the cell.)

Some molecules can't go through the cell membrane.

Answered by armanicarden1 | 2024-06-10

Some molecules can't pass alone and they need help because they can't pass through the cell membrane without help

Answered by gotgame122 | 2024-06-10

Passenger molecules require carrier molecules to enter cells because they often cannot cross the hydrophobic cell membrane by themselves. Carrier proteins facilitate their transport through changes in shape and are essential for both passive and active transport. This specificity ensures that cells can effectively control the movement of substances necessary for their function.
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Answered by armanicarden1 | 2025-01-23