3 AS Biology resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter AS SubjectClear filter Biology Exam board AQA OCR TopicClear filter Transport across membranes Resources Flashcards Multi-tool Revision Cards Exchange across membranes AS, Biology 10 revision cards Biology Revision- Transport across membranes AS, Biology 26 flashcards Transport across membranes AS, Biology 6 revision cards Search again