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WorksheetsEnzyme
Total questions: 10
Worksheet time: 10mins
The solid line on the graph represents the product formed over time for a reaction in a cell.
Which other line represents the effect of adding the enzyme for this reaction?
A
B
C
D
What is the factor limiting the rate in region X?
substrate concentration
enzyme concentration
temperature
number of active sites
What would limit the initial rate of reaction at point X?
enzyme concentration
pH
substrate concentration
temperature
A
B
C
D
Which statements describe some enzyme actions?
1. Enzymes hold reacting molecules so that their reactive groups are close together.
2. In an enyzme-catalysed reaction, more molecules have sufficient energy to react than without enzyme.
3. Reactions catalysed by enzymes take place at a lower temperature than they would without the enzyme.
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
A
B
C
D
Enzymes are fibrous proteins that catalyse reactions inside cells.
True
False
What is the optimal pH for this enzyme?
6
10
9
7
Most enzymes have the ending:
-ose
-ase
-ic acid
-ate
What factors would affect the reaction rate?
(multiple correct answer)
temperature
pH
concentration of enzymes
concentration of substrate
