Name: 

Biochemistry Quiz


True/False
Indicate whether the sentence or statement is true or false.
 

1. 

Because water is a polar molecule, it tends to cause ionic compounds mixed in water to dissociate into ions.
 

2. 

Capillarity is apparent when you put a straw in water and the water level inside the straw rises higher than the level in the surrounding container.
 

3. 

Organic compounds are substances produced and found in living things.
 

4. 

Functional groups are side groups of carbon compounds that confer specific properties to these compounds.
 

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

5. 

Which of the following characteristics of water is not a result of hydrogen bonding?
a.
adhesive strength
b.
capillarity
c.
cohesive strength
d.
All of the above are a result of hydrogen bonding.
 

6. 

Carbon is different from most other elements in that
a.
it has four electrons in its outermost energy level.
b.
it readily bonds with other carbon atoms.
c.
it can form single, double, or triple bonds with other atoms.
d.
it shares two electrons with another atom when it forms a covalent bond.
 

7. 

Which of the following is not true of alcohols?
a.
They contain a hydroxyl group (–OH).
b.
They are polar molecules.
c.
They can affect processes in living things, either positively or negatively.
d.
They are the only kind of functional group in organic molecules that contain oxygen.
 

8. 

Amino acids are monomers of
a.
disaccharides.
c.
nucleotides.
b.
proteins.
d.
steroids.
 

9. 

Which organic molecule below is most closely related to lipids?
a.
amino acids
c.
nucleotides
b.
CH2 chains
d.
sugars
 

10. 

Which organic molecule below is most closely related to nucleic acids?
a.
amino acids
c.
nucleotides
b.
CH2 chains
d.
sugars
 

Completion
Complete each sentence or statement.
 

11. 

Water is very effective at dissolving other polar substances because of its ____________________.
 

 

12. 

Breaking of ____________________ bonds is the first thing that happens when water is heated, which means that it takes a great deal of thermal energy to raise the temperature of water.
 

 

13. 

In the molecule that has the chemical formula C2H4, the carbon atoms are bonded together with a ____________________ bond.
 

 

14. 

Because oxygen atoms tend to attract positively charged atoms, organic compounds that contain oxygen atoms tend to form ____________________ bonds.
 

 

15. 

In a condensation reaction, two molecules become linked together and a molecule of  ____________________ is produced.
 

 

16. 

The formation of polymers from monomers occurs as a result of ____________________ reactions, and the breakdown of polymers into monomers occurs as a result of ____________________ reactions.
 

 

17. 

Lipids are ____________________ molecules because they have no negative and positive poles.
 

 

18. 

A phospholipid is a molecule with a(n) ____________________ head.
 

 

19. 

Lipids are ____________________ molecules because they have no negative and positive poles.
 

 

20. 

A phospholipid is a molecule with a(n) ____________________ head.
 

 



 
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