Multiple Choice
Which of the following functions does active transport perform in a cell?
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6. The Membrane
Active Transport
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Which type of transport moves molecules against the concentration gradient?
A
Osmosis
B
Facilitated diffusion
C
Active transport
D
Simple diffusion
Verified step by step guidance1
Understand the concept of concentration gradient: Molecules naturally move from areas of high concentration to areas of low concentration. Moving against this gradient means moving from low to high concentration.
Identify the types of transport mechanisms: Osmosis, facilitated diffusion, simple diffusion, and active transport.
Recognize that osmosis and diffusion (both facilitated and simple) are passive transport mechanisms, meaning they do not require energy and move molecules along the concentration gradient.
Learn that active transport is the mechanism that requires energy, usually in the form of ATP, to move molecules against the concentration gradient.
Conclude that active transport is the correct type of transport for moving molecules against the concentration gradient, as it involves energy expenditure to achieve this movement.
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