Enzyme Classes

Question 1

Oxidoreductase

Answer 1

Catalyzes redox reaction

Question 2

Transferase

Answer 2

Catalyzes transfer of C-, N-, or P-containing groups

Does not use ATP or water

Question 3

Hydrolase

Answer 3

Catalyzes cleavage of bond by adding water

Question 4

Lyase

Answer 4

Catalyzes cleavage of C-C, C-S, C-N bonds

Does not use water

Question 5

Isomerase

Answer 5

Catalyzes racemization of optical and geometric isomers

Question 6

Ligase

Answer 6

Catalyzes formation of bonds between carbon and O,S,N

Question 7

kCAT

Answer 7

The number of substrate molecules converted to product per enzyme molecule per second

Question 8

Holoenzyme

Answer 8

Enzyme protein with its non-protein components

Question 9

Apoenzyme

Answer 9

Enzyme protein without its non-protein components

Question 10

Cofactors

Answer 10

Metal ions

Question 11

Coenzymes

Answer 11

Organic; Cosubstrates or prosthetic groups

Question 12

Cosubstrate

Answer 12

Organic cofactors that only transiently associate with the enzyme and are changed during the reaction
Released in an altered state at the end of the reaction

Question 13

Prosthetic groups

Answer 13

Tightly bound coenzymes that are permanently associated with the protein