Name: 
 

Practice Test 2 - Living Things



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The classes of organic compounds found in all living things are
a.
vitamins and minerals.
b.
halogen compounds, alcohols, organic acids, and esters.
c.
simple carbohydrates and hydrocarbons.
d.
carbohydrates, lipids, proteins, and nucleic acids.
 

 2. 

Which organic compound carries information from one generation to the next during reproduction?
a.
carbohydrates
b.
lipids
c.
proteins
d.
DNA
 

 3. 

Most of your body’s fluids are made up of
a.
lipids.
b.
water.
c.
nucleic acids.
d.
organic acids.
 

 4. 

Which of the following describes lipids?
a.
used to store energy
c.
make up most of the cell membrane
b.
do not dissolve in water
d.
all of the above
 

 5. 

The compounds that store information for building proteins are
a.
lipids.
c.
nucleic acids.
b.
hydrocarbons.
d.
carbohydrates.
 

 6. 

Glucose is a
a.
wax.
c.
simple carbohydrate.
b.
starch.
d.
complex carbohydrate.
 

 7. 

Which of these statements about proteins is NOT correct?
a.
Certain proteins provide structural support for cells.
b.
Proteins are involved in the transport of molecules across membranes.
c.
The function of a protein depends on its shape.
d.
Nucleic acids are the building blocks of proteins.
 

 8. 

Which of the following is an inorganic compound?
a.
methane (CH4)
c.
methylamine (CH3NH2)
b.
water (H2O)
d.
acetic acid (CH3COOH)
 

 9. 

Carbohydrates are
a.
made of one or more simple sugars bonded together.
b.
used as a source of energy.
c.
used for energy storage.
d.
All of the above
 

 10. 

Which of the following is used to store energy in the body?
a.
carbohydrates
c.
proteins
b.
lipids
d.
both (a) and (b)
 

 11. 

When an organism has used up most of its carbohydrates, it can obtain energy by
a.
building lipids.
c.
breaking down lipids.
b.
storing lipids.
d.
dissolving lipids in water.
 



 
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