How are enzymes classified? Flashcards
1
Q
How are enzymes named
A
Take the substrate and add the suffix “ase”
Prote ase
Amyl ase
Lip ase
2
Q
What are 2 other examples of older names which give no clue to the substrate they catalyse
A
- Trypsin
- Pepson
3
Q
How might enzymes be classified
A
- According to the type of reaction they catalyse
- e.g. Alcohol dehydrogenase removes hydrogen from alcohol
- Another example is
- DNA polymerase catlyses the formation and break down of DNA by polymerisations
4
Q
What are the 6 mains groups of enzymes classified by the nature of their actions
A
- Hydrolases
- Oxoreductases
- Oxidases
- Transferases
- Isomerases
- Lyases
- Ligases
5
Q
What is the function of the hydrolase group of enzymes?
A
- Catalyses the hydrolysis of a substrate by adding a molecule of water
6
Q
A
7
Q
What is an example of a hydrolase
A
- DIgestive enzymes which work in our gut and can also be found in germinating seeds
8
Q
A
9
Q
A
10
Q
What is an example of a hydrolase catlytic reaction
A
- Maltone → maltase glucose + glucose
- Lipid → Lipase fatty acids + glycerol
11
Q
What is the function of oxyreductase
A
- Oxoreductases are involved in oxidation and reduction reactions
- i.e. Also known as redox reactions
12
Q
What are two types of oxyreductases
A
- Dehydrogenases
- Oxidases
13
Q
What is the function of dehydrogenases
A
- Dehydrogenases oxidase the substrate by removing hydrogen, passing it on to a hydrogen acceptor or co factor
14
Q
What is the function of oxidases
A
- Catlyse the addition of oxygen to hydrogen forming water
15
Q
What is the function of transferases
A
They transfer a group of atoms from one molecule to another
