Question

Which types of molecules are able to diffuse across the cell membrane?

water molecules

small molecules

very large molecules

fat-soluble molecules

Answer 1

Which types of molecules are able to diffuse across the cell membrane?

water molecules (Yes)

small molecules (Yes)

very large molecules (No)

fat-soluble molecules (Yes)

Answer 2

small molecules

because - Small hydrophobic molecules and gases, which can dissolve in the membrane's core, cross it with ease. Other molecules require proteins to transport them across the membrane. Proteins determine most of the membrane's specific functions. :)