Chemistry for Biologists

Enzymes

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

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

D
B
C
A
3. Which of the following is not a commercial advantage of enzyme immobilization:
the reaction can be carried out at higher temperatures
enzyme easily recovered from reaction mixture
the initial cost of the enzyme is reduced
the thermal stability of the enzyme is increased
4. Enzymes belong to which group of chemicals:
lipids
saccharides
proteins
polysaccharides
5. Enzymes act as biological:
catalysts
inhibitors
substrates
solvents
6. Enzymes speed up biochemical reactions by:
lowering the activation energy of the reaction
increasing the activation energy of the reaction
lowering the temperature of the reaction
increasing the temperature of the reaction
7.
The diagram shows a typical relationship between enzyme activity and:

substrate concentration
temperature
enzyme concentration
pH
8.
The diagram shows a typical relationship between enzyme activity and:

temperature
enzyme concentration
substrate concentration
pH
9. Chemicals (other than the substrate) that affect enzyme activity are called:
immobilizers
exhibitors
mobilizers
inhibitors
10. Enzymes used to break down proteins in biological washing powders belong to the group:
lactases
hydrolases
lipases
proteases

 

RSC