1.6 Flashcards
what is a metabolic pathway
a series of chemical reactions that start with a substrate and finish with an end product
how are metabolic pathways controlled
enzymes
what is an anabolic reaction
the build up of large molecules from small molecules
what is a catabolic reaction
breakdown of large molecules into smaller molecules
what reactions require energy
anabolic - requires energy
catabolic - does not need energy
what reactions produce energy
anabolic - does not release energy
catabolic - release energy
what is an example of an anabolic reaction
protein synthesis
give an example of a catabolic reaction
respiration
what is an induced fit
when the active site of an enzyme is changed slightly to better fit the substrate after it binds
what is the activation energy
amount of energy needed to make a reaction happen
what lowers the activation energy of a reaction
enzymes
what effect does increasing the substrate concentration have on reaction rate
as the substrate concentration increases, the reaction rate increases until the saturation point is reached, then no difference is made
when the saturation point
when all the active sites are occupied
what is competitive inhibition
bind at the active site preventing the substrate from binding
how can competitive inhibition be reversed
increasing substrate concentration
what is non competitive inhibition
they bind away from the active site but change the shape of the active site preventing the substrate from binding, cannot be reversed
what is feedback inhibition
the end product hits a critical concentrator , it then inhibits a previous enzyme until the concentration decreases
