Which substances can cross plasma membrane more easily?
Correct answer: C. Lipid soluble molecules
- A. Starch
- B. Protein
- C. Lipid soluble molecules
- D. Ions
Explanation
Lipid soluble molecules can cross plasma more easily than starch, protein, and ions. The plasma membrane is a phospholipid bilayer, which is made up of two layers of fatty acids. Lipid soluble molecules, such as oxygen, carbon dioxide, and fat-soluble vitamins, can dissolve in the fatty acids of the plasma membrane and cross the membrane easily.
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