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WorksheetsEnzymes Review
Total questions: 14
Worksheet time: 21mins
Name
Class
Date
1.
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
2.
Enzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?
a)
reducing the number of products
b)
reducing the activation energy
c)
increasing the temperature of the cell
d)
increasing the concentration of reactants
3.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
4.
What is structure D?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
5.
What is structure C?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
6.
What is structure E, F, G?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
7.
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 .
8.
What is the name for the mechanism of enzyme activity?
a)
Lock and key
b)
jigsaw puzzle
c)
hammer and nail
d)
two hands pattern
9.
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.
10.
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
11.
Which of these is most likely an enzyme?
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
12.
The pH at which an enzyme is most efficient is called the _________ pH of an enzyme.
a)
neutral
b)
optimum
c)
minimum
d)
experimental
13.
What is the optimal pH of enzyme A?
a)
8
b)
2
c)
5.7-10
d)
10
14.
Which substrate would this enzyme catalyze?
a)
b)
c)
d)
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