Multiple Choice
Which type of transport requires energy to move substances across cell membranes?
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6. The Membrane
Active Transport
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Which of the following membrane activities require energy from ATP hydrolysis?
A
Facilitated diffusion
B
Simple diffusion
C
Osmosis
D
Active transport
Verified step by step guidance1
Understand that active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, against the concentration gradient.
Recognize that active transport requires energy because it is moving substances against their natural flow, which is not energetically favorable.
Identify that the energy required for active transport is provided by ATP (adenosine triphosphate) hydrolysis, which releases energy when ATP is converted to ADP (adenosine diphosphate) and an inorganic phosphate.
Contrast active transport with facilitated diffusion, simple diffusion, and osmosis, which do not require energy input because they involve movement along the concentration gradient.
Conclude that among the given options, only active transport requires energy from ATP hydrolysis, as it is the only process that moves substances against their concentration gradient.
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