Multiple Choice
Which of the following best describes the process of facilitated diffusion?
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6. The Membrane
Simple and Facilitated Diffusion
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Which process is an example of facilitated transport?
A
Carbon dioxide exiting a cell
B
Oxygen diffusing through the cell membrane
C
Glucose entering a cell via a transport protein
D
Water moving through aquaporins
Verified step by step guidance1
Facilitated transport is a type of passive transport that involves the movement of molecules across a cell membrane via transport proteins.
Identify the molecules mentioned in the problem: carbon dioxide, oxygen, glucose, and water.
Carbon dioxide and oxygen typically move across cell membranes by simple diffusion, which does not require transport proteins.
Water moves through aquaporins, which are specialized transport proteins, indicating facilitated transport.
Glucose entering a cell via a transport protein is a classic example of facilitated transport, as it requires a specific protein to help it cross the membrane.
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