Which of the following statements about the Na⁺-K⁺ ATPase pump is false?
A)It transports Na⁺ out of cells and K⁺ into cells.
B)It binds to,and hydrolyzes,ATP.
C)It is constantly active in all cells.
D)Its activity requires the expenditure of metabolic energy.
E)It transports Na⁺ and K⁺ in a 1:1 ratio.

Question

Which of the following statements about the Na⁺-K⁺ ATPase pump is false?
A)It transports Na⁺ out of cells and K⁺ into cells.
B)It binds to,and hydrolyzes,ATP.
C)It is constantly active in all cells.
D)Its activity requires the expenditure of metabolic energy.
E)It transports Na⁺ and K⁺ in a 1:1 ratio.

Quizplus · Accepted Answer

The Na⁺-K⁺ ATPase pump transports Na⁺ and K⁺ in a 3:2 ratio, not a 1:1 ratio. It moves three sodium ions out of the cell and two potassium ions into the cell for each ATP molecule hydrolyzed.

Which of the Following Statements About the Na⁺-K⁺ ATPase Pump Is