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WorksheetsChemical Reactions and Enzymes
Total questions: 20
Worksheet time: 14mins
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.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
3.
Enzymes are an example of
a)
Lipids
b)
Carbohydrate
c)
Protein
d)
Nucleic Acid
4.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
5.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
6.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
7.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
8.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shape of the enzyme are changed and it denatures
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
9.
The molecule an enzyme is working on is called the:
a)
Substrate
b)
Solvent
c)
Allosteric Inhibitor
d)
CoEnzyme
10.
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.
11.
What is underlined in the chemical equation below?
Na + Cl ---> NaCl
a)
Products
b)
Reactants
12.
In the chemical equation below, the product is....
Na + Cl ---> NaCl
a)
Na
b)
NaCL
c)
Cl
d)
NaCl
13.
Select all the Reactants
a)
b)
c)
14.
Select all the products
a)
b)
c)
15.
Substances that form as the result of a chemical reaction
a)
products
b)
reactants
c)
coefficients
d)
subscripts
16.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
17.
What is the activation energy?
a)
The energy of the products
b)
The energy of the reactants
c)
The minimum energy needed by the reactants to form the products.
d)
The energy lost in the reaction
18.
What kind of reaction is this?
a)
Endothermic
b)
Exothermic
c)
Cannot be determined
19.
What letter represents the energy of the products?
a)
A
b)
B
c)
C
d)
D
20.
Change the molecular conformation of a protein to destroy its function.
a)
Denature
b)
Coenzyme
c)
Catalyst
d)
Activation Energy
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