Metabolic Pathways U1

larger molecules are broken down into smaller molecules, energy is released

smaller molecules are built up into bigger molecules, energy is required

temperature pH enzyme concentration substrate concentration inhibitors

as substrate concentration increases, the rate of reaction increases until there are more substrate molecules than active sites to combine with, here the rate of reaction levels off as enzyme concentration becomes the limiting factor

as enzyme concentration increases, the rate of reaction increases until there are more enzyme active sites present than substrates, here the rate of reaction levels off as enzyme becomes the limiting factor

there are two types of inhibitors, competitive and non-competitive

all the chemical reactions that take place within a living cell, involving reversible and irreversible steps, sometimes with alternative routes, that are all controlled by enzymes

to avoid them occurring unnecessarily and wasting cell resources or allowing a build up of an intermediate

each enzyme is coded for by a specific gene, the action can be controlled by the expression of the gene (switched on or off)