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WorksheetsEnzymes
Total questions: 20
Worksheet time: 13mins
Name
Class
Date
1.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
2.
Each enzyme only has 1 substrate that will fit its active site. What is this called?
a)
reusablility
b)
denaturation
c)
specificity
d)
fragility
3.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
4.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
5.
In the diagram, what is letter A?
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
6.
Enzymes are...
a)
nucleic acids
b)
proteins
c)
lipids
d)
carbohydrates
7.
An enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?
a)
true
b)
false
8.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered denature
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
9.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
10.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
11.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
12.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
13.
What is structure D?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
14.
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 .
15.
Which 2 factors can affect the rate of enzyme activity?
a)
Light intensity
b)
Temperature
c)
pH
d)
Oxygen concentration
16.
What is structure E, F, G?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
17.
Based on the graph, what temperature does this enzyme work best?
a)
15 C
b)
40 C
c)
30 C
d)
50 C
18.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die
b)
The shape of the enzyme changes as it denatures
c)
The enzymes become more active
d)
The enzymes remain the same
19.
Which of the following denatures an enzyme?
a)
High Temperatures
b)
Incorrect pH
c)
Both
20.
Each enzyme only has 1 substrate that will fit its active site. What is this called?
a)
reusable
b)
catalyst
c)
specificity
d)
fragile
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