Facilitated diffusion

Needs a carrier protein

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Is an active process

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Occurs against the concentration gradient

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Needs ATP

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Solution

The correct option is C Needs a carrier protein
Substances having a hydrophilic moiety find it difficult to pass through the membrane. Their movement has to be facilitated. So, facilitated diffusion needs a 'carrier protein'.
Thus, the correct answer is 'Needs a carrier protein.'

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Similar questions

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.

Process involving movement of substances against the concentration gradient using ATP.

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