In passive transport method, transport of molecules takes place --------- the concentration gradient.

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Solution

In passive transport method, transport of molecules takes place along the concentration gradient.
-There is no need of ATP in the passive transport.
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Assertion (A): Active transport is uphill transport.

Reason (R): Active transport uses energy to pump molecules against the concentration gradient.

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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