WorksheetsEnzyme
Total questions: 15
Worksheet time: 14mins
Name
Class
Date
1.
Enzymes are considered to be
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
2.
What is the purpose of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
3.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
4.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered or denatured
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
5.
What are the enzymes called when they are at low temperature?
a)
denatured
b)
Killed
c)
inactive
d)
normal
6.
What are the enzymes called when they are at high temperature or extreme pH?
a)
denatured
b)
Killed
c)
inactive
d)
normal
7.
What happens to an enzyme when it is denatured?
a)
Activation energy is lowered.
b)
It becomes stronger.
c)
It loses its shape.
d)
Activation energy is raised.
8.
Which factors can change the shape of an enzyme and thus denatures a enzyme?
a)
Excessive heat and changes in pH
b)
Nothing can
c)
Exposure to light and sound
d)
Exposure to bacteria and Amoebas
9.
Every enzyme has a optimal temperature and pH. True or False?
a)
True
b)
False
10.
Based on the graph, what temperature does this enzyme work best?
a)
15 C
b)
40 C
c)
30 C
d)
47 C
11.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
12.
Cells can only work if their enzymes are functioning. What can you infer from the graph?
a)
Cells function best at low pH values
b)
Cells function fine at all pH values
c)
Cells function best at high pH values
d)
Cells do not function well if the pH is too high or too low
13.
What is the optimal pH of enzyme A?
a)
8
b)
2
c)
5.7-10
d)
10
14.
What is the optimal pH of enzyme B?
a)
8
b)
2
c)
5.7-10
d)
10
15.
The graph shows the relative rates of action of four enzymes, A, B, C, and D. Which enzyme shows the greatest change in its rate of action with the least change in pH?
a)
enzyme A
b)
enzyme B
c)
enzyme C
d)
enzyme D
100 %
