Oxygen and Carbon Dioxide Are Able to Pass Through the Plasma

question 25

Multiple Choice

Oxygen and carbon dioxide are able to pass through the plasma membrane of a cell because

• A) they are both polar molecules.
• B) both are lipid soluble.
• C) they move through ion pores.
• D) each binds to a transport protein that "pulls" it across the membrane.
• E) they are small and nonpolar and readily pass between phospholipids.

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