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Worksheetsenzyme
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
What happens to an enzyme when it denatures?
a)
The activation energy of the reaction is doubled.
b)
The activation energy of the reaction is lowered.
c)
It's optimal conditions for temperature of the enzyme are doubled.
d)
The shape of the enzyme molecule is changed.
2.
Most enzymes are composed of .....
a)
Lipids
b)
Carbohydrates
c)
Proteins
d)
Nucleic Acids
3.
Enzymes in your body probably work best at which of the following temperatures>
a)
25oC
b)
98oC
c)
37oC
d)
210oC
4.
In an Exergonic reaction, heat is ________.
a)
Absorbed
b)
Created
c)
Destroyed
d)
Released
5.
In an Endergonic reaction, heat is ________.
a)
Released
b)
Absorbed
c)
Created
d)
Destroyed
6.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
7.
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
8.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
9.
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 .
10.
Based on the graph, what is the optimal temperature for this enzyme?
a)
15oC
b)
40oC
c)
30oC
d)
35oC
11.
Which of these is most likely an enzyme?
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
12.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
13.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
14.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
15.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
16.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
17.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
18.
Which 2 factors can affect the rate of enzyme activity?
a)
Light intensity
b)
Temperature
c)
pH
d)
Oxygen concentration
19.
When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as the hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). This rapid change in reaction rate suggests
a)
that liver contains lots of germs
b)
the liver contains an enzyme that breaks down hydrogen peroxide
c)
that liver is a substrate for hydrogen peroxide
d)
that hydrogen peroxide is a powerful enzyme
20.
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
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