Can Macromolecules Freely Cross a Plasma Membrane?

The greater the amount of lipid in a molecule, the easier it is for that molecule to pass through a plasma membrane. The plasma membrane, because of the channel proteins, is said to be freely permeable. Macromolecules can freely cross a plasma membrane.

Can the macromolecules pass through the cell membrane?

Lipid bilayers are semipermeable: Small uncharged molecules can pass more or less freely from one side of the membrane to the other, but for charged species or macromolecules, such as proteins and DNA, the lipid bilayer is a major obstacle to diffusion.

Can large macromolecules freely cross a plasma membrane?

How Do Molecules Cross the Plasma Membrane? The plasma membrane is selectively permeable; hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot.

Alexander Ross

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.