WorksheetsEnzymes
Total questions: 30
Worksheet time: 51mins
Name
Class
Date
1.
Enzymes are considered to be
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.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
4.
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
5.
What is structure A?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
6.
What is structure D?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
7.
What is structure C?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
8.
What is structure E, F, G?
a)
Substrate
b)
Active site
c)
Enzyme
d)
Products
9.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
10.
Each enzyme only has 1 substrate that will fit its active site. What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
11.
What 3 letters do enzymes typically end in?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
12.
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.
13.
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 .
14.
Which chemical is classified as an enzyme?
a)
Galactose
b)
Lipid
c)
Protease
d)
Manganese dioxide
15.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
16.
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
17.
If enzyme C is functioning at 25°C and a pH of 7, under which conditions would the rate of enzyme action probably increase?Use the chart below and your knowledge of enzymes to answer the question.
a)
The temperature is decreased to 22 C and the pH is kept the same
b)
The temperature is kept the same and the pH is decreased to 6
c)
The temperature is increased to 44 C and the pH is kept the same
d)
The temperature is increased to 30 C and the pH is increased to 8
18.
Which statement best describes the enzyme represented in the graphs below?
a)
This enzyme works best at a temperature of 35 C and a pH of 8
b)
This enzyme works best at a temperature of 50 C and a pH of 12
c)
Temperature and pH have no influence on the activity of this enzyme
d)
This enzyme works best at a temperature above 50 C and a pH above 12
19.
Enzymes are composed of which of the following monomers?
a)
amino acids
b)
acyl groups
c)
nucleotides
d)
monosaccharides
20.
Which of these is most likely an enzyme?
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
21.
An enzyme speeds up a chemical reaction in the cell, but can only be used once?
a)
true
b)
false
22.
What is true about enzymes?
a)
They are unaffected by changes in pH.
b)
They are unaffected by changes in temperature.
c)
Their overall shape can change without affecting their function.
d)
They catalyze one specific type of reaction.
23.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
24.
Letter B represents the ...
a)
active site
b)
enzyme
c)
substrate
d)
products
25.
Letter C represents the ...
a)
active site
b)
enzymes
c)
substrate
d)
products
26.
Letter D represents the ...
a)
active site
b)
enzymes
c)
substrate
d)
products
27.
Letter E represents the ...
a)
active site
b)
enzyme
c)
substrate
d)
products
28.
According to the graph, at which pH do all three enzymes show some activity?
a)
2
b)
5
c)
8
d)
11
29.
What is an Enzyme?
a)
energy needed to get a reaction started
b)
arge compound formed from combinations of many monomers
c)
proteins that act as biological catalyst
d)
an organic compound
30.
In red blood cells, the compound carbonic anhydrase increases the rate at which carbon dioxide is converted to bicarbonate ions for transport in the blood. In red blood cells, carbonic anhydrase acts as which of the following?
a)
an enzyme
b)
a hormone
c)
a lipid
d)
a sugar
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