What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.3.1.1Enzymes as globular proteins• Enzymes as globular proteins: intracellular and extracellularSyllabus objective3.1.2Enzyme mode of action• Mode of action: active site, enzyme-substrate complex, lowering activation energy, enzyme specificitySyllabus objective3.1.3Enzyme action hypotheses• Lock-and-key hypothesis vs induced-fit hypothesisSyllabus objective3.1.4Enzyme reaction investigations• Investigate enzyme reactions: measure product formation (catalase) and substrate disappearance (amylase)Syllabus objective3.1.5Colorimetry in enzyme reactions• Use colorimeter for reactions involving colour changesSyllabus objective