Biology A-Level
Passive versus active transport
What Passive versus active transport means in Biology A-Level, as defined for OCR.
Definition of Passive versus active transport
Check what you remember
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Reference: OCR
Facilitated diffusion moves polar molecules and ions down their gradient through carrier or channel proteins without ATP, whereas active transport uses carrier proteins and ATP hydrolysis to move substances against a concentration gradient.
Topics that use Passive versus active transport
- Biological membranes (OCR A-Level)
Related terms
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- Cholesterol
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- Compartmentalisation within cells
- Control variables
- Fluid mosaic model
- glycoproteins and glycolipids
- Lysis and crenation in animal cells
Using Passive versus active transport in the exam
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