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Enzyme

Total questions: 20

Worksheet time: 15mins

Name
Class
Date
1.

Enzymes are an example of

a)

Lipids

b)

Carbohydrate

c)

Protein

d)

Nucleic Acid

2.
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
3.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
4.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
5.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
6.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
7.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
8.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
9.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
10.
Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the
a)
enzyme substrate complex.
b)
reaction site.
c)
active site.
d)
lock and key.
11.

How does an enzymes shape relate to its function?

a)

the shape of the enzyme has no relation to its function

b)

the enzyme is shaped specially for certain substrates to perform a specific reaction

c)

the enzyme shape acts as a receptor to certain products

d)

the enzyme shape can fit into specific substrates to cease a reaction

12.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
13.
What will most likely happen if an appropriate enzyme is added to a chemical reaction? 
a)
The reaction rate will increase.
b)
The equilibrium of the reaction will be maintained. 
c)
The reaction rate will decrease.
d)
The reaction will stop. 
14.
Which of the following best explains why enzymes are necessary for many cellular reactions?
a)
Enzymes supply the oxygen necessary for the reactions
b)
 Enzymes change reactants from solid to liquids during the reactions.
c)
The reactions take up too much space in the cell if the enzymes are missing.
d)
The reactions are too slow to meet the needs of the cell if enzymes are missing. 
15.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
16.
Enzymes are composed of which of the following monomers? 
a)
amino acids
b)
carbohydrates
c)
nucleotides
d)
monosaccharides
17.

Enzymes are _______________ that _____________________ chemical reactions by ____________ the amount of activation energy required to start the reaction.

a)

carbohydrates, slow down, lowering

b)

proteins, speed up, increasing

c)

lipids, speed up, lowering

d)

proteins, speed up, lowering

18.

The ____________________ mechanism describes how each substrate must fit into the enzyme.

a)

lock and key

b)

hammer and nail

c)

jigsaw puzzle

d)

seesaw

19.
This reaction shows a(n) ____________ reaction
a)
Catabolic
b)
Anabolic
c)
Dehydration Synthesis
d)
Halogenation
20.
Which of these is most likely an enzyme?  
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase

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