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WorksheetsEnzymes
Total questions: 24
Worksheet time: 15mins
Name
Class
Date
1.
How do enzymes speed up chemical reaction?
a)
Increasing activation energy
b)
Decreasing activation energy
c)
Increasing deactivation energy
d)
Decreasing deactivation energy
2.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
3.
Each enzyme only has 1 substrate that will fit its active site. What is this called?
a)
reusablility
b)
denaturation
c)
specificity
d)
fragility
4.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
5.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
6.
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 .
7.
Based on the graph, what is the optimal temperature for this enzyme?
a)
15oC
b)
40oC
c)
30oC
d)
35oC
8.
In the diagram, what is letter A?
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
9.
Enzymes are...
a)
nucleic acids
b)
proteins
c)
lipids
d)
carbohydrates
10.
An enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?
a)
true
b)
false
11.
What is the function of an enzyme?
a)
enzymes break themselves into small pieces
b)
enzymes slow down chemical reactions
c)
enzymes speed up chemical reactions
d)
enzymes combine products to form reactants
12.
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
13.
Which of these is NOT true?
a)
Enzymes can denature (change shape) when the temperature gets too high.
b)
Enzymes can only be used once in a chemical reaction.
c)
Extreme pH can denature enzymes.
d)
Enzymes speed up chemical reactions.
14.
Which of these is most likely an enzyme?
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
15.
Which is NOT true?
a)
Enzymes speed up chemical reactions.
b)
Enzymes react best at a specific temperature.
c)
Enzymes only control ONE type of reaction.
d)
Enzymes are made of fatty acids.
16.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
17.
Babies do not have well developed digestive systems for breaking down proteins; therefore baby food is prepared after treatment with which enzyme?
a)
protease
b)
lipase
c)
carbohydrase
d)
synthase
18.
The pH at which an enzyme is most efficient is called the _________ pH of an enzyme.
a)
neutral
b)
optimum
c)
minimum
d)
experimental
19.
The current model of enzyme action is referred to as the...
a)
Induced Fit Model
b)
Lock & Key Model
c)
Singer-Nicolson Model
d)
Davson-Danielli Model
20.
Enzymes speed up reaction rates by changing...
a)
Activation Energy
b)
pH
c)
Hydrogen Bonds
d)
Kinetic Energy
21.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
22.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
23.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
24.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
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