How do polar molecules move across the membrane?

How do polar molecules move across the membrane?
  1. By simple diffusion
  2. By osmosis
  3. By facilitated diffusion
  4. By active transport

Solution

Polar molecules cannot pass through the nonpolar lipid bilayer of the membrane on their own, so they require a carrier protein to facilitate their transport across the membrane, a process called facilitated diffusion.

Asked in: NCERT

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