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Which of the following statement about pumps is not true?

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They are made up of proteins.

Movement through them is along the concentration gradient.

They are present in the membrane.

They require energy to transport substances across the membrane.

answer is B.

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Detailed Solution

Pumps are proteins that use energy to carry substances across the cell membrane. These pumps can transport substances from a low concentration to a high concentration (‘uphill’ transport).

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