In Facilitated Diffusion, a Molecule Is Moved

question 22

Multiple Choice

In facilitated diffusion, a molecule is moved

• A) against its concentration gradient with the assistance of a protein carrier molecule and requires energy.
• B) down its concentration gradient with the assistance of a protein carrier molecule, and no energy is required.
• C) against its concentration gradient while Na is moved with its concentration gradient.
• D) against its concentration gradient with the assistance of a protein carrier molecule, but no energy is required.
• E) with its concentration gradient while Na is moved against its concentration gradient.

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