Multiple Choice
Which of the following is a measure of the energy needed to move a sodium ion from a high concentration to a low concentration?
379
views
3. Energy
Energy Sources and Generation
Multiple Choice
In eukaryotic cells, what energy-carrying molecule most directly provides the energy to power primary active transport across membranes (e.g., the / pump)?
A
B
NADH
C
ATP
D
Glucose
Verified step by step guidance1
Understand that primary active transport requires a direct source of energy to move molecules against their concentration gradient across the membrane.
Recall that the sodium-potassium pump (Na+/K+ pump) is a classic example of primary active transport in eukaryotic cells.
Identify the molecule that provides energy for this pump by hydrolyzing a high-energy phosphate bond to release energy.
Recognize that ATP (adenosine triphosphate) is the energy-carrying molecule that directly powers the Na+/K+ pump by donating a phosphate group during hydrolysis.
Note that other molecules like O2, NADH, and glucose are involved in cellular metabolism but do not directly provide energy for the pump's activity.
Related Videos
Related Practice
