active transport
What active transport means in Biology A-Level, as defined for AQA, Pearson Edexcel.
Definitions of active transport
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Reference: AQA
The process by which pyruvate crosses the inner mitochondrial membrane through a specific carrier protein, requiring energy.
Movement of substances against a concentration gradient, requiring carrier proteins and the hydrolysis of ATP.
A process in which carrier proteins hydrolyse ATP to change shape and move ions against their gradient.
The movement of substances against a concentration gradient (from low to high concentration) using energy (ATP) and carrier proteins.
The movement of substances against a concentration gradient, requiring energy in the form of ATP and the use of carrier proteins.
Topics that use active transport
- ATP (AQA A-Level)
- Respiration (A-level only) (AQA A-Level)
- Transport across cell membranes (AQA A-Level)
- Topic 1: Lifestyle, Health and Risk (Pearson Edexcel A-Level)
- Topic 2: Genes and Health (Pearson Edexcel A-Level)
Related terms
- ATP hydrolase
- Fluid mosaic model
- Phenotype
- semi-conservative replication
- anaerobic stage
- ATP hydrolysis
- betalain pigment leakage
- calibration curve
Using active transport in the exam
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