CIE IGCSE Biology: 复习笔记：6.1.1 Photosynthesis
CIE IGCSE Biology: 复习笔记：6.1.1 Photosynthesis Photosynthesis Green plants make the carbohydrate?glucose?from the raw materials?carbon dioxide?and?water At the same time?oxygen?is ...
OCR A Level Biology:复习笔记2.5.2 Membrane Structure & Permeability
Factors Affecting Membrane Structure & Permeability The?permeability?of?cell membranes?is affected by different?factors?or conditions, such as: Temperature Solvent concentration Temperat...
CIE IGCSE Biology: 复习笔记：5.1.5 Enzymes & pH: Extended
CIE IGCSE Biology: 复习笔记：5.1.5 Enzymes & pH: Extended Enzymes & pH: Extended The optimum pH for most enzymes is 7 but some that are produced in acidic conditions, such as the stomach, h...
OCR A Level Biology:复习笔记2.5.1 The Cell Surface Membrane
Roles of Membranes Membranes are?vital?structures found in all cells The?cell surface membrane?creates an enclosed space separating the internal cell environment from the external environment Intra...
OCR A Level Biology:复习笔记2.4.9 Practical: Measuring Enzyme Activity
Practical: Measuring Enzyme Activity The?progress?of?enzyme-catalysed reactions?can be investigated by: Measuring the?rate of formation of a product Measuring the?rate of disappearance of a substra...
OCR A Level Biology:复习笔记2.4.8 Coenzymes, Cofactors & Prosthetic Groups
Coenzymes, Cofactors & Prosthetic Groups There are substances?other than?substrates and inhibitors that?interact?with?enzymes Some enzymes can only?function properly?if another?non-protein subs...
OCR A Level Biology:复习笔记2.4.7 Enzyme Activity: Enzyme Inhibitors
Enzyme Inhibitors Reversible inhibitors An enzyme's activity can be reduced or stopped,?temporarily, by a?reversible inhibitor There are?two types?of reversible inhibitors: Competitive?inhibitors h...
OCR A Level Biology:复习笔记2.4.6 Enzyme Activity: Substrate Concentration
Enzyme Activity: Substrate Concentration The?greater?the?substrate concentration, the?higher?the?rate of reaction: As the number of substrate molecules increases, the likelihood of enzyme-substrate...
OCR A Level Biology:复习笔记2.4.5 Enzyme Activity: Enzyme Concentration
Enzyme Activity: Enzyme Concentration Enzyme concentration affects the rate of reaction The?higher?the?enzyme concentration?in a reaction mixture, the?greater the number of active sites?available a...
