Enzymes

Question 1

Classification of enzymes

Answer 1

1. Oxidoreductases
2. Transferases
3. Hydrolases
4. Lyases
5. Isomerases
6. Ligases
7. Translocases

Question 2

Oxidoreductase

Answer 2

Enzyme Class 1:
- catalyze oxidation-reduction reactions by transferring Electrons between molecules
-> together with electron Hydrogen is moving

AH₂ + B <-> A + BH₂

Question 3

Transferase

Answer 3

Enzyme Class 2:
- Transfers functional groups from one molecule to another

A-B + C <-> A + B-C

Question 4

Hydrolase

Answer 4

Enzyme Class 3:
- catalyze cleavage of bonds by Addition of water

A-B + H₂O <-> A-H + B-OH

Question 5

Lyase

Answer 5

Enzyme Class 4:
- add or remove groups to form Double bonds or rings without hydrolyses or oxidation

X Y
| |
A-B <-> A=B + X-Y

Question 6

Isomerase

Answer 6

Enzyme Class 5:
- catalyze intramolecular rearrangement without adding or removing atoms

X Y Y X
| | | |
A-B <-> A-B

Question 7

Ligase

Answer 7

Enzyme Class 6:
- catalyze formation bonds between Carbon and O, S and N complex to hydrolysis of high-Energy phosphates

A + B + NTP = A-B + NDP + P