| Term 
 | Definition 
 
        | Class of enzymes that catalyzes oxidation-reduction rxns ex: dehydrogenase
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        | Term 
 | Definition 
 
        | Catalyze transfer of C-, N- , P- containing groups ex: serine --> glycine
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        |  | 
        
        | Term 
 | Definition 
 
        | Catalyze cleavage of bonds by addition of H20 ex: Urea + H20 --> CO2 + NH3
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        |  | 
        
        | Term 
 | Definition 
 
        | Catalyze cleavage of C-C , C-S  and some C-N bonds ex: decarboxylase
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        |  | 
        
        | Term 
 | Definition 
 
        | Catalyze racemization of optical or geometric isomers ex: mutase
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        |  | 
        
        | Term 
 | Definition 
 
        | catalyze formation of bonds between carbon and O,S,N coupled with hydrolases of high energy phosphate
 ex: carboxylase + ATP
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