Multiple Choice
A primary active transport process is one in which which of the following occurs?
48
views
9. Transport Across Membranes
Principles of Transmembrane Transport
Multiple Choice
In the context of principles of transmembrane transport, which molecule is directly used as an energy source for primary active transport across the plasma membrane?
A
Glucose
B
ATP
C
Oxygen ()
D
Sodium ions ()
Verified step by step guidance1
Understand that primary active transport involves moving molecules across the plasma membrane against their concentration gradient, which requires an input of energy.
Recall that the energy for primary active transport is directly provided by the hydrolysis of a specific molecule, which releases energy to power the transport proteins (pumps).
Identify the molecule that is commonly hydrolyzed to provide this energy; this molecule is adenosine triphosphate (ATP).
Recognize that glucose, oxygen (O\_2), and sodium ions (Na\^+) are not the direct energy sources but rather substances that may be transported or involved in other cellular processes.
Conclude that ATP is the molecule directly used as an energy source for primary active transport across the plasma membrane.
Related Videos
Related Practice
