DEFINITIONS AND KEY POINTS FOR Enzymes

  TERMS   DEFINITIONS  
Enzyme An enzyme is a biological catalyst that can accelerate a spec i he chemical reaction by Io ering act ix at ion energy hut remain unaltered in the process.
  Key and lock model According to this model a specific enzyme can transform only specific substrate into products.  
  Cofactors The metal ions which are loosely attached with the enzymes are called cofactors.  
  Cofactors Coenzy Ines are non protein, organic molecules that participate in enzyme-catalyzed reactions.  
  Prosthetic group The coy alently bonded non-protein part cofactors are called prosthetic group.  
  Oxidoreductase These enzy mes catalyze biological oxidations and reductions.  
  Transferasc These enzy mes catalyze the transfer of a group from one kind of molecule to another.  
  Turnover


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Number of
enzyme

The number of substrate molecules on which one

enzyme  moleculeactsin   one  second. iscalled
turnover over number.

 
  Activation energy Activation energyis the minimum energy that is

required to start a reaction.    .

 
Key and lock – According to this model a specific enzyme can

 

 

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