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Enzyme

Total questions: 20

Worksheet time: 12mins

Name
Class
Date
1.

What happens to an enzyme when it denatures?

a)

The activation energy of the reaction is doubled.

b)

The activation energy of the reaction is lowered.

c)

It's optimal conditions for temperature of the enzyme are doubled.

d)

The shape of the enzyme molecule is changed.

2.

Most enzymes are composed of .....

a)

Lipids

b)

Carbohydrates

c)

Proteins

d)

Nucleic Acids

3.

Enzymes in your body probably work best at which of the following temperatures>

a)

25oC

b)

98oC

c)

37oC

d)

210oC

4.

One function of lipids is to store energy. What is another function of lipids in the human body?

a)

To form cell membranes

b)

To make energy from the sun.

c)

To control chemical reactions.

d)

To provide energy for the cell.

5.

Organisms living in a bog environment must be able to tolerate nitrogen-poor acidic conditions. Bog plants such as the Venus flytrap and sundew are able to obtain their nitrogen by attacking and consuming insects. These plants produce chemicals that break down the insects into usable compounds.

These chemicals present in the bog plants that break down the insects mentioned in the reading passage are most likely...

a)

hormones

b)

lipids

c)

enzymes

d)

carbohydrates

6.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
7.
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
8.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
9.
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 .
10.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
11.
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
12.
Which of these is most likely an enzyme?  
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
13.
What is another name for enzymes?
a)
chemical catalysts
b)
microorganisms
c)
biological catalysts
d)
inorganic catalysts
14.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
15.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
16.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
17.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
18.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
19.

Which 2 factors can affect the rate of enzyme activity?

a)

Light intensity

b)

Temperature

c)

pH

d)

Oxygen concentration

20.
When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as the hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). This rapid change in reaction rate suggests 
a)
that liver contains lots of germs
b)
 the liver contains an enzyme that breaks down hydrogen peroxide
c)
 that liver is a substrate for hydrogen peroxide
d)
that hydrogen peroxide is a powerful enzyme