1 AS Biology resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter AS SubjectClear filter Biology Exam board OCR TopicClear filter 4:1 digestion of starch digestions of proteins enzymes extracellular enzymes induced-fit hypothesis intracellular enzymes lock and key hypothesis Resources Crossword Flashcards Multi-tool Quizsearch 4:1 enzyme action AS, Biology 50 flashcards Search again