Final

Question 1

What’s the difference between cofactors and coenzymes?

Answer 1

Cofactor - inorganic - ions

Coenzyme - organic - vitamins

Question 2

What are the 6 classes of enzymes?

Answer 2

Oxidoreductases, transferases, hydrolases, lyases, isomerases, ligases

Question 3

Oxidoreductases: what do they catalyze?

Answer 3

Transfer of electrons

Question 4

Transferases: what do they catalyze?

Answer 4

Transfer of groups

Question 5

Hydrolases: what do they catalyze?

Answer 5

Hydrolysis reactions

Question 6

Lyases: what do they catalyze?

Answer 6

Adding groups to double bonds, forming double bonds by removing groups

Question 7

Isomerases: what do they catalyze?

Answer 7

Transfer of groups within molecules to yield isomeric forms

Question 8

Ligases: what do they catalyze?

Answer 8

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

Question 9

The relationship between rate of reaction and activation energy is:

Answer 9

Inverse and exponential

Question 10

AAs that participate in enzymatic catalysis:

Answer 10

Asp, Glu, His, Cys, Tyr, Lys, Arg, Ser

Question 11

AAs involved in catalytic triad:

Answer 11

Asp, His, Ser