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  • Cell Membrane Structure and Function
  • How are small molecules like CO2 and O2 transported acros...
Multiple choice

How are small molecules like CO2 and O2 transported across the membrane?

  1. By transmembrane protein channels or aquaporins

  2. By passive osmosis

  3. By endocytosis

  4. By pumps

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Small molecules or ions such as carbon dioxide (CO2) and oxygen (O2) can move across the plasma membrane by passive osmosis.

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