Quiz 3
Ch 3
Name________________________
Remote # ____________
1. (CH2O)n is the common formula for:
a. amino acids.
b. Sugars (carbohydrates).
c. fatty acids.
d. hydrophylic molecules
e. hydrophobic molecules
6. A cell membrane is primarily composed
of __________.
a. oils, which are liquid at room temperature
b. saturated fats
c. phospholipids
d. steroids
2. During the process of polymerization
(synthesis of biological polymers), water is a
__________, and the reaction is
consequently called a __________ reaction.
a. reactant, dehydration
b. reactant, hydrolysis
c. by-product, dehydration
d. product, hydrolysis
7. Nucleotides __________.
a. are composed of a sugar, a salt, and a
phospholipid
b. are found only in nucleic acids, the
molecules responsible for passing genetic
information from generation to generation
c. are found in nucleic acids, intracellular
messenger molecules, and high-energy
molecules
d. Both the first and second answers above
are correct.
3. Saturated fats __________.
a. have no double covalent bonds
b. are solid at room temperature
c. contain the maximum number of
hydrogen atoms possible
d. Both the first and second answers above
are correct.
e. The first, second, and third answers
above are correct.
8. All of the following are polysaccharides
except __________.
a. cellulose
b. starch
c. glycogen
d. glucose
4. Phospholipids contain a "head group"
that is _________ and two fatty acid "tails"
that are __________.
a. hydrophobic, hydrophilic
b. hydrophilic, hydrophobic
c. hydrolyzed, nonhydrolyzed
d. hydrophilic, hydrophilic
9. All of the following are proteins except
__________.
a. cholesterol
b. enzymes
c. antibodies
d. All of the above are proteins.
10. Which of the following is not found in
DNA?
a. adenine
b. guanine
c. uracil
d. cytosine
e. thymine
5. Protein functions in cells include
__________.
a. storage and defense
b. catalysis of biochemical reactions
c. structure and movement
d. transport and defense
e. all of the above
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