Which stoichiometry characterizes one complete cycle of the Na+/K+-ATPase pump?
Answer and explanation
Correct answer: B. 3 Na+ ions exported and 2 K+ ions imported per ATP molecule hydrolyzed pathway
The electrogenic Na+/K+-ATPase uses one ATP molecule to pump 3 sodium ions out of the cytoplasm and 2 potassium ions into the cell, against their electrochemical gradients. The other ratios or passive transport options are incorrect.
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