Section 24.1
Proteins
Practice Test
1.
Most enzymes are ____________.
a.
lipids
b.
carbohydrates
c.
proteins
d.
denatured
Hint
2.
What two functional groups are contained in all amino acids?
a.
carboxyl and amino
b.
amido and ether
c.
amino and amido
d.
carbonyl and halogen
Hint
3.
What is the name given to a series of amino acids that are linked by peptide bonds?
a.
protein
b.
carbohydrate
c.
lipid
d.
ester
Hint
4.
How many different amino acids are commonly found in living things?
SC.F.2.4.2
a.
30
b.
15
c.
20
d.
10
Hint
5.
Proteins can form two three-dimensional structures. Changes in temperature, pH, and other factors will disrupt these structures. By what name do we know this disruption?
a.
helix
b.
denaturation
c.
sheet
d.
polypeptide
Hint
6.
What type of chemical functional group is made when a peptide bond is formed?
a.
amide
b.
ester
c.
carbonyl
d.
amine
Hint
7.
A chain of 15 amino acids joined by peptide bonds is called a
n
__________.
a.
protein
b.
enzyme
c.
polypeptide
d.
peptide
Hint
8.
A polypeptide of 50 or more amino acids is called a protein. What kind of molecule is the polypeptide?
a.
polymer
b.
stereomer
c.
isomer
d.
monomer
Hint
9.
What are the four primary functions and uses of proteins in living cells?
SC.F.1.4.5
a.
catalysis, structure, transport, carrying signals
b.
energy storage, digestion, denaturation, transport
c.
denaturation, structure, transport, carrying signals
d.
recycling, digestion, polymerization, transport
Hint
10.
Enzymes act as __________ in your body.
SC.F.1.4.5
a.
lipids
b.
catalysts
c.
carbohydrates
d.
substrates
Hint
11.
To function properly, the reactive site of an enzyme must have the same shape as the substrate to which it binds. This fit is commonly known as _____________.
a.
heme and globin
b.
tongue and groove
c.
projection and enclosure
d.
lock and key
Hint
