Section 1
Question  Answer 
E.C.1  Oxidoreductase 
E.C.2  Transferases 
E.C.3  Hydrolase 
E.C.4  Lyase 
E.C.5  Isomerase 
E.C.6  Ligase 
 memorize 
Section 2
Question  Answer 
Oxidoreductase  Catalyze oxidation and reduction 
Transferases  Catalyze transfer of group such as methyl or glycosyl groups from a donor molecule to an acceptor molecule 
Hydrolase  Catalyze the hydrolytic cleavage of CC, CO, CN, PO and certain other bonds, including acid anhydride bonds 
Lyase  Catalyze cleavage of CC, CO, CN, and other bonds by elimination, leaving double bonds, and also add groups to double bonds. 
Isomerase  Catalyze geometric or structural changes within a single molecule 
Ligases  Catalyze the joining together of two molecules, coupled to the hydrolysis of a pyrophosphoryl group in ATP or a similar nucleoside triphosphate. 
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Section 3
Question  Answer 
E.C.1.1  Dehydrogenase 
E.C.1.2  Oxidases 
E.C.1.3  Reductase 
E.C.1.4  Peroxidase 
E.C.1.5  Catalase 
E.C.1.6  Oxygenase 
E.C.1.7  Hydroxylase 
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Section 4
Question  Answer 
E.C.2.1  Transaldolase 
E.C.2.2  Transketolase 
E.C.2.3  Acyl transferase 
E.C.2.4  Methyl transferase 
E.C.2.5  Glucosyl transferase 
E.C.2.6  Phosphoryl transferase 
E.C.2.7  Kinase 
E.C.2.8  Phosphomutase 
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Section 5
Question  Answer 
E.C.3.1  Esterases 
E.C.3.2  Glycosidase 
E.C.3.3  Peptidase 
E.C.3.4  Phosphatase 
E.C.3.5  Thiolase 
E.C.3.6  Phospholipase 
E.C.3.7  Amidase 
E.C.3.8  Deaminase 
E.C.3.9  Ribonuclease 
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Section 6
Question  Answer 
E.C.4.1  Decarboxylase 
E.C.4.2  Aldolase 
E.C.4.3  Hydratase 
E.C.4.4  Dehydratase 
E.C.4.5  Synthase 
E.C.4.6  Lyase 
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Section 7
Question  Answer 
E.C.5.1  Racemase 
E.C.5.2  Epimerase 
E.C.5.3  Isomerase 
E.C.5.4  Mutase 
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Section 8
Question  Answer 
E.C.6.1  Synthetase 
E.C.6.2  Carboxylase 
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