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:

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

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

temperature
pH
enzyme concentration
substrate concentration
9. Enzymes belong to which group of chemicals:
lipids
polysaccharides
proteins
saccharides
10. Enzymes act as biological:
solvents
inhibitors
substrates
catalysts

 

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