Assertion: enzyme | /r/CapableOf | speed up reaction
Facets:
value: without themselves
type: MANNER
value: by lowering the activation energy
type: MANNER
Source sentences:
text: As catalysts, enzymes are only required in very low concentrations, and they speed up reactions without themselves being consumed during the reaction.
text: In this case you have to add more enzyme to speed up the reaction again.
text: By lowering the activation energy, the enzyme speeds up that reaction by a rate of 1011 or more; a reaction that would normally take over 3,000 years to complete spontaneously might take less than a second with an enzyme.
text: Misconception [scientific idea]: enzymes die when they are heated [enzymes cannot be killed as they are not living, instead enzymes denature when they are heated above a certain temperature]; enzymes denature when it’s cold [frequency of collisions decreases between substrate and enzyme]; enzymes only break down large molecules [enzymes can also speed up reactions involving building large molecules from smaller ones e.g. protein synthesis]
text: As catalysts, enzymes are only required in very low concentrations, and they speed up reactions without themselves being consumed during the reaction.