Given below is a comparison of the characteristic features of facilitated and active transport mechanisms. Which of the following is wrong?

Requires special membrane proteins
Facilitated transport -No
Active transport - Yes

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Highly selective
Facilitated transport - No
Active transport - Yes

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Uphill transport
Facilitated transport - No
Active transport - Yes

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Requires ATP
Facilitated transport - No
Active transport - Yes

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Solution

The correct option is A Requires special membrane proteins
Facilitated transport -No
Active transport - Yes
Both facilitated and active transport require specialized membrane proteins. These specialized proteins have high specificity and transport only selective ions. Facilitated diffusion is along the concentration gradient i.e. it is a downhill movement. Hence, it does not require any energy input. Active transport is an uphill transport and hence needs ATP as the energy source.

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Similar questions

Assertion: Both facilitated diffusion and active transport are mediated through membrane proteins.

Reason: Only active transport is selective in action.

\begin{matrix} Facilitated diffusion & Active transport Transport saturates & yes & (1) Uphill transport & (2) & yes \end{matrix}

Consider the following statements and choose the correct answer.

I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with the protein.

II. Different types of proteins present in the membrane play a major role in both active as well as passive transport.

III. The carrier proteins needed by facilitated and active transport are specific.

IV. There is no need of energy to pump molecule against a concentration gradient in active transport.

V. Transport rate reaches the saturation point when all the active proteins are used.

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