AP Biologyeasymcq1 pt
Which transport process requires energy input?
A.Active transport
B.Simple diffusion
C.Facilitated diffusion
D.Osmosis
Explanation
Core Concept
Moving solutes against their gradient is endergonic and needs ATP (or another gradient). All passive processes — diffusion, osmosis, facilitated diffusion — run downhill for free.
Correct Answer
AActive transport
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