Enzyme Classes

Question 1

Oxidoreductases

Answer 1

Transfer of electrons (hydride ions or H atoms)

Question 2

Transferases

Answer 2

Group transfer reactions

Question 3

Hydrolases

Answer 3

Hydrolysis reactions (transfer of functional groups to water)

Question 4

Lyases

Answer 4

Addition of groups to double bonds, or formation of double bonds by removal of groups

Question 5

Isomerases

Answer 5

Transfer of groups within molecules to yield isomeric forms

Question 6

Ligases

Answer 6

Formation of C-C, C-S, C-O, and C-N bonds by condensation reactions coupled to cleavage of ATP or similar cofactor