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WorksheetsEnzymes Test Review
Total questions: 25
Worksheet time: 9mins
Name
Class
Date
1.
Enzymes need certain environmental conditions in order to function properly. What happens when enzymes are heated to a high temperature?
a)
they die
b)
they denature
c)
they change their amino acid sequence
d)
they work better
2.
Which of the following correctly describes how enzymes work?
a)
they lower the energy of the reactants to increase the rxn rate
b)
they supply energy to the reaction to increase the rxn rate
c)
they lower the energy of the products to increase the rxn rate
d)
they lower the activation energy of the reaction to increase the rxn rate
3.
The part of the enzyme that the substrate bonds to is called the _____.
a)
active site
b)
activation energy
c)
bond site
d)
peptide bond
4.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
5.
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 .
6.
Which of these do NOT affect enzyme activity?
a)
Temperature
b)
pH
c)
Competitive Inhibitors
d)
Carbohydrates
7.
Which biomolecule is made of mainly hydrocarbons and therefore is very hydrophobic?
a)
carbohydrate
b)
nucleic acid
c)
protein
d)
lipid
8.
When water is added to split a molecule, the reaction is known as a(n) __ reaction.
a)
dehydration synthesis
b)
condensation
c)
hydrolysis
d)
super magical
9.
C6H12O6 is the formula for which sugar?
a)
glucose
b)
frucotose
c)
maltose
d)
sucrose
10.
Alpha helix and beta pleated sheets are part of what level of protein structure?
a)
primary
b)
secondary
c)
tertiary
d)
quaternary
11.
The structural level of a protein least affected by hydrogen bonds is
a)
primary level
b)
secondary level
c)
tertiary level
d)
all levels are equally affected
12.
Which of these describes a saturated fatty acid?
a)
All single C-C bonds
b)
They form straight chains
c)
They are solids at room temp.
d)
All of the above
13.
All of the following are correct about enzymes EXCEPT?
a)
they enable reactions to occur that would not normally occur.
b)
they lower the energy activation
c)
they are polymers of amino acids
d)
they generally denature at temperatures above 40 degrees Celsius
14.
What molecule is this?
a)
this is a monosaccharide
b)
this is a polysaccharide
c)
this is a protein
d)
this is a lipid
15.
What molecule is this?
a)
this is a monosaccharide
b)
this is a polysaccharide
c)
this is a protein
d)
this is a lipid
16.
Which of the following is the process used to bond the monomers together?
a)
Hydrolysis
b)
Water Removal
c)
Dehydration Synthesis
d)
Water Synthesis
17.
Which of the following environmental changes could denature an enzyme?
a)
too high a concentration of substrate
b)
too high a concentration of enzyme
c)
pH too low
d)
too low temperature
18.
What are the building blocks of a lipid?
a)
3 gylcerols and 1 fatty acid
b)
1 glycerol and 3 fatty acids
c)
3 amino acids
d)
3 simple sugars
19.
Which of these don't effect the shape of a protein?
a)
Heating the protein up
b)
Peptide bonds between AA
c)
Hydrogen bonds between functional groups
d)
Order of nucleic acids
20.
What is NOT true about optimal temperature?
a)
Enzymes the most active at this temperature
b)
Reactions don't happen if they are not at optimal temperature
c)
Reactions react faster at optimal temperature
d)
Product forming would occur very quickly
21.
If an inhibitor fits in the active site on an enzyme then...
a)
It is a non-competitive inhibitor
b)
It is a competitive inhibitor
c)
the inhibitor and substrate are not similar shapes
d)
The enzyme will break down the inhibitor
22.
What is a solution that has an excess of hydroxide (OH-) ions?
a)
pH
b)
acid
c)
neutral
d)
base
23.
Based on the graph, what temperature does this enzyme work best?
a)
15 C
b)
40 C
c)
30 C
24.
Enzymes will make a reaction go _______ and use ______ energy.
a)
faster, less
b)
faster, more
c)
slower, less
d)
slower, more
25.
Why does enzyme activity decrease when it is in solution that has either a too high or too low pH?
a)
All enzymes only work in neutral solutions
b)
Enzyme activity remains unchanged in different pH's
c)
The shape of the active site changes
d)
The shape of the substrate changes
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