The Facilitated Diffusion of Ions from the Soil Solution into Root

question 78

Multiple Choice

The facilitated diffusion of ions from the soil solution into root cells requires

• A) that the concentration of ions at the root cells be the same outside and inside.
• B) that the concentration of ions outside the root cells be lower than the concentration inside.
• C) the expenditure of ATP.
• D) specific channel proteins in the membranes.
• E) cellular respiration.

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