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225438
Enzymes
Description
NCEA Level 2 Biology (Gene Expression) Mind Map on Enzymes, created by elliemay96 on 23/09/2013.
No tags specified
biology
gene expression
biology
gene expression
ncea level 2
Mind Map by
elliemay96
, updated more than 1 year ago
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Created by
elliemay96
about 11 years ago
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Resource summary
Enzymes
Are part of the protein group
Proteins are made of amino acids
Act as biological catalysts
Control the speed of all chemical reactions in organisms
Anabolism: Reactions that synthesise larger molecules from smaller ones
Reactions that break down large molecules into small molecules
Enzymes are specific
One enzyme catalyses only one specific reaction
They all have the ending 'ase'
Lock-and-key model
The shape of an enzyme in an area known as its active site corresponds to that of a substance it catalyses
Factors that affect enzyme activity:
Warmer temp= faster reaction. Can denature above 40 degrees.
pH: optimum= 7. Can denature if too extreme
Co-factors: many enzymes need another molecule to assist
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