Chemistry for Biologists

Enzymes

1.
In the diagram, which letter represents the ‘active site-directed inhibitor present’ curve:

C
D
B
A
2.
In the diagram, which letter represents the ‘non-active site-directed inhibitor present’ curve:

D
C
A
B
3. Enzymes used to break down proteins in biological washing powders belong to the group:
hydrolases
lipases
proteases
lactases
4. Which of the following is not a commercial advantage of enzyme immobilization:
the reaction can be carried out at higher temperatures
the thermal stability of the enzyme is increased
the initial cost of the enzyme is reduced
enzyme easily recovered from reaction mixture
5. Chemicals (other than the substrate) that affect enzyme activity are called:
immobilizers
inhibitors
exhibitors
mobilizers
6.
The diagram shows a typical relationship between enzyme activity and:

temperature
substrate concentration
enzyme concentration
pH
7.
The diagram shows a typical relationship between enzyme activity and:

temperature
substrate concentration
enzyme concentration
pH
8. Enzymes act as biological:
solvents
inhibitors
substrates
catalysts
9. Enzymes speed up biochemical reactions by:
increasing the temperature of the reaction
lowering the activation energy of the reaction
increasing the activation energy of the reaction
lowering the temperature of the reaction
10. Enzymes belong to which group of chemicals:
lipids
saccharides
proteins
polysaccharides

 

RSC