Which of the following criteria does not pertain to facilitated transport?
Correct answer: B. Uphill transport
- A. Transport saturation
- B. Uphill transport
- C. Requirement of special membrane proteins
- D. High selectivity
Explanation
Facilitated transport is the process of spontaneous passive transport or downhill transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. The movement of molecules or ions is from a region of lower concentration to a region of higher concentration is uphill transport. Thus, the correct answer is option (B), 'Uphill transport'. This refers to when all proteins are used for transport in facilitated transport. Facilitative does require membrane proteins for transport. It means membrane is highly selective it allows only certain molecules to pass through while prevent rest of them.
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