What Happens When Diffusion Moves Molecules Across the Plasma Membrane

question 59

Multiple Choice

What happens when diffusion moves molecules across the plasma membrane?

• A) Most molecules are capable of crossing the phospholipid bilayer at any location and at basically the same rate.
• B) Energy input is required to transport molecules.
• C) The rate of diffusion cannot be influenced by the cell.
• D) The cell gains needed materials and gets rid of excess materials very quickly.
• E) The process is relatively slow and is driven by concentration gradients.

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