Multiple choice

In sodium-potassium pump, the event of dephosphorylation occurs when

  1. 3 Na+ ions bind to the active site of the pump

  2. 2 molecules of K+ bind to the pump at their respective binding sites

  3. hydrolysis of ATP takes place after Na+ ions bind to ATP

  4. K+ ions are transported into the cell
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the pump binds two molecules of K+ to their respective bonding sites on the extracellular face of the transport protein, dephosphorylation of the pump occurs.

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