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Question
Which of the following criteria does not pertain to facilitated diffusion?
Which of the following criteria does not pertain to facilitated diffusion?
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Solution
The correct option is D Uphill transport
A concentration gradient must be present for molecules to diffuse even if diffusion is facilitated by the proteins. This process is called facilitated diffusion. Criteria for facilitated transport or diffusion are:
- Special proteins help move substances across membranes without the expenditure of ATP energy.
- Facilitated diffusion is very specific and highly selective. It allows cell to select substances for uptake.
- Facilitated transport does not follow uphill transport instead follow downhill transport.
A concentration gradient must be present for molecules to diffuse even if diffusion is facilitated by the proteins. This process is called facilitated diffusion. Criteria for facilitated transport or diffusion are:
- Special proteins help move substances across membranes without the expenditure of ATP energy.
- Facilitated diffusion is very specific and highly selective. It allows cell to select substances for uptake.
- Facilitated transport does not follow uphill transport instead follow downhill transport.
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