The membrane transport protein Na+-K+ ATPase carries both Na+ and K+ ions across the plasma membrane. Typically the concentration of K+ inside cells is about 30 times higher inside the cell than outside. The concentration of Na+ is about 20 times less inside the cell than outside. Based on this information, which statement below is false? A. The proper functioning of Na+-K+ ATPase could serve as an energy source for secondary active transport proteins. B. It is a symport. C. Transport of Na+ and K+ must be coupled to an exergonic reaction. D. Na+-K+ ATPase likely undergoes conformational changes during transport.
The membrane transport protein Na+-K+ ATPase carries both Na+ and K+ ions across the plasma membrane. Typically the concentration of K+ inside cells is about 30 times higher inside the cell than outside. The concentration of Na+ is about 20 times less inside the cell than outside. Based on this information, which statement below is false? A. The proper functioning of Na+-K+ ATPase could serve as an energy source for secondary active transport proteins. B. It is a symport. C. Transport of Na+ and K+ must be coupled to an exergonic reaction. D. Na+-K+ ATPase likely undergoes conformational changes during transport.
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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The membrane transport protein Na+-K+ ATPase carries both Na+ and K+ ions across the plasma membrane. Typically the concentration of K+ inside cells is about 30 times higher inside the cell than outside. The concentration of Na+ is about 20 times less inside the cell than outside. Based on this information, which statement below is false?
A. The proper functioning of Na+-K+ ATPase could serve as an energy source for secondary active transport proteins.
B. It is a symport.
C. Transport of Na+ and K+ must be coupled to an exergonic reaction.
D. Na+-K+ ATPase likely undergoes conformational changes during transport.
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