Why can nonpolar molecules pass through membranes?
Understand the Problem
The question is asking about the properties of nonpolar molecules and their ability to pass through cell membranes. It seeks to understand the mechanisms involved in membrane permeability, particularly in relation to the nonpolar nature of certain molecules.
Answer
Nonpolar molecules are soluble in the lipid bilayer, allowing them to pass through membranes easily.
Nonpolar molecules can pass through cell membranes because they are soluble in the lipid bilayer and do not interfere with the hydrophobic/hydrophilic nature of the membrane.
Answer for screen readers
Nonpolar molecules can pass through cell membranes because they are soluble in the lipid bilayer and do not interfere with the hydrophobic/hydrophilic nature of the membrane.
More Information
Phospholipid bilayers of cell membranes are hydrophobic and have small spaces that allow nonpolar, hydrophobic molecules to diffuse through without interference.
Tips
A common mistake is confusing the behavior of small nonpolar molecules with polar molecules or ions. Polar molecules require transport proteins or energy to cross the membrane.
Sources
- The web page with info on - NCBI - ncbi.nlm.nih.gov
- Why do cell membranes let small non-polar molecules through but... - Biology Stack Exchange - biology.stackexchange.com
- How do non-polar molecules pass through the cell membrane via ... - Reddit - reddit.com
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