WorksheetsEnzymes
Total questions: 20
Worksheet time: 2hrs 36mins
Name
Class
Date
1.
Enzymes belong to which group of organic molecules?
a)
nucleic acids
b)
proteins
c)
lipids
d)
carbohydrates
2.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
3.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
4.
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.
5.
In the diagram, what is letter A?
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
6.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
7.
An enzyme speeds up a chemical reaction in the cell but can only be used once. True or False?
a)
true
b)
false
8.
What is the function of an enzyme?
a)
enzymes break themselves into small pieces
b)
enzymes slow down chemical reactions
c)
enzymes speed up chemical reactions
d)
enzymes combine products to form reactants
9.
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
10.
Which of these is most likely an enzyme?
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
11.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
12.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
13.
Which enzyme is most efficient in a basic solution?
a)
A
b)
B
14.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
15.
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
16.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
17.
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 .
18.
What makes an enzyme substrate specific?
a)
Size
b)
Shape
c)
Name
d)
Location it is found in
19.
Which substrate would this enzyme catalyze?
a)
Δ
b)
σ
c)
∅
d)
μ
20.
Which 2 factors can affect the rate of enzyme activity?
a)
Light intensity
b)
Temperature
c)
pH
d)
Oxygen concentration
100 %
