Question

Which of the following molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism? Select all that apply.waterionsproteinsoxygencarbon dioxidelipidssucrose

Answer 1

Small nonpolar molecules water, oxygen, carbon dioxide, lipids

Answer 2

Molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism - water, oxygen, carbon dioxide, and lipids.

What is Osmosis ?

Osmosis is transport in which the movement of a solvent occurs through a semipermeable membrane from a less concentrated solution into a more concentrated one without any protein.

Diffusion is a process where the molecule moves from one part to another part through the membrane.

Diffusion and osmosis are types of passive transport that do not require energy

This kind of movement does not involve transport proteins or other complex mechanisms.

Thus, Molecules can cross the lipid bilayer of a membrane directly, without a transport protein or other mechanism - water, oxygen, carbon dioxide, and lipids.

Learn more about plasma membrane here ;

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