Question
How is facilitated diffusion different from diffusion?
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S. No.
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Simple diffusion
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Facilitated diffusion
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| 1. |
Simple diffusion does not require the assistance of a carrier molecule.
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Facilitated diffusion can occur only with the assistance from a carrier molecule.
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| 2. | The speed of simple diffusion is relatively slow. | The speed of facilitated diffusion is comparatively fast. |
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3.
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Simple diffusion is not solute specific.
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Facilitated diffusion is always solute specific.
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4.
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The simple diffusion process cannot be inhibited by an inhibitor molecule.
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The facilitated diffusion can be inhibited by specific inhibitor which binds to the carrier molecules.
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5.
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Simple diffusion is always a passive process.
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Facilitated diffusion may be an active or passive process.
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6.
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Simple diffusion does not require energy from ATP.
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Facilitated diffusion may or may not require energy from ATP.
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7.
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In simple diffusion, the molecules can pass only in the direction of concentration gradient.
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In facilitated diffusion, the molecules can pass both in direction and opposite of the concentration gradient.
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8.
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Simple diffusion permits the passage of only small and nonpolar molecules across the plasma membrane.
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Facilitated diffusion permits the passage of large and polar molecules across the plasma membrane.
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