Enzyme Classes

Question 1

oxidoreductase

Answer 1

redox reactions

often have cofactor that acts as an electron carrier (NAD+ or NADP+)

Question 2

dehydrogenase

Answer 2

oxidoreductase (redox reactions)

Question 3

reductase

Answer 3

oxidoreductase (redox reaction)

Question 4

-oxidase

Answer 4

oxidoreductase, where oxygen is the final electron acceptor

Question 5

transferase

Answer 5

movement of functional group

Question 6

kinase

Answer 6

form of transferase

moves phosphate from atp (usually) to molecule

Question 7

hydrolase

Answer 7

breaking compound by adding water

Question 8

phosphatase

Answer 8

form of a hydrolase (breaks with water)

cleaves phosphate from molecule

Question 9

peptidase

Answer 9

hydrolase (breaks with water)

Question 10

nuclease

Answer 10

hydrolase (breaks with water)

Question 11

lipase

Answer 11

hydrolase (breaks with water)

Question 12

lyase

Answer 12

cleave single molecule into two products WITHOUT water

can also catalyze the reverse reaction - can synthesize too

Question 13

synthase

Answer 13

also generally a lyase (makes or breaks bonds in a molecule without water or redox)
usually synthesis of smaller molecules

Question 14

isomerase

Answer 14

rearrangement of bonds IN THE SAME MOLECULE
can be an oxidoreductase, transferase, or lyase, depending on mechanism of the enzyme

**reactions between stereoisomers and constitutional isomers

Question 15

ligase

Answer 15

addition or synthesis reactions - large, similar molecules usually
often need ATP
**nucleic acid synthesis