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16 February, 02:40

12. Which is required for cells to pump ions against the concentration gradient?

A. ATP

B. Osmosis

C. Phospholipids

D. Water

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Answers (1)
  1. 16 February, 03:18
    0
    The correct option is A) ATP

    Explanation:

    Some ions or molecules tend to move in the cell along a concentration gradient. Such types of movement is known as passive transport. In passive transport, molecules move from a higher concentration to a lower concentration. Such kind of movement doesn't require energy.

    Other kinds of molecules or ions move against the concentration gradient i. e from a lower concentration to a higher concentration. Energy is required for these process to occur. The energy used is in the form of ATP.
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