The cellular process known as the sodium-potassium pump was discovered in the 1950s. This process is a form of active transport that moves 3 sodium ions to the outside of a cell for every 2 potassium ions it moves into the cell. Which of these best explains why energy is needed for active transport?
a. Ions are attached to large proteins
b. Ions are trapped inside the plasma membrane
c. Ions are moved against the concentration gradient
d. Ions are negatively charged
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option c) is correct because k and Na are positive metal and it's force of attraction ...I hope it's help you....... plz mark as brainlist answer.......
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