Biology: Chapter 3 – Biochemistry

25 Jun Biology: Chapter 3 – Biochemistry

Question
Name: ________________________ Class: ___________________ Date: __________

ID: A

Biology: Chapter 3 – Biochemistry
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____

1. All organic compounds contain the element
a. C.
b. N.

c.
d.

Ca.
Na.

____

2. Carbon is different from many 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. All of the above

____

3. 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 contains oxygen.

____

4. The formation of ADP and inorganic phosphate from ATP and water is an example of which kind of
reaction?
a. condensation
c. hydrolysis
b. polymerization
d. oxidation

____

5. Which of the following is a carbohydrate?
a. DNA
b. insulin

c.
d.

wax
sucrose

____

6. Which organic molecule below is classified as a carbohydrate?
a. amino acid
c. nucleotide
b. CH2 chain
d. sugar

____

7. Animals store glucose in the form of
a. cellulose.
b. glycogen.

c.
d.

wax.
lipids.

8. Polysaccharides are
a. carbohydrates.
b. lipids.

c.
d.

proteins.
unsaturated fats.

____

____

9. All of the following are examples of carbohydrates except
a. sugar.
c. steroids.
b. cellulose.
d. glycogen.

____ 10. Amino acids are monomers of
a. disaccharides.
b. proteins.

c.
d.

1

nucleotides.
steroids.

Name: ________________________

ID: A

____ 11. Which organic molecule below is most closely related to proteins?
a. amino acids
c. nucleotides
b. CH2 chains
d. sugars
____ 12. Long chains of amino acids are found in
a. carbohydrates.
b. lipids.

c.
d.

proteins.
sugars.

____ 13.

Refer to the illustration above. Molecules like molecule 2 are found in
a. carbohydrates.
c. nucleic acids.
b. lipids.
d. proteins.
____ 14. Lipids are
a. polar molecules.
b. similar to water molecules.

c.
d.

____ 15. All of the following are examples of lipids except
a. saturated fats.
c.
b. starch.
d.

protein molecules.
nonpolar molecules.
cholesterol.
earwax.

____ 16. Saturated fatty acids contain
a. carbon atoms that are each bonded to four other atoms.
b. carbon atoms linked by double bonds.
c. no carboxyl (–COOH) groups.
d. more than 100 carbon atoms.
____ 17. Lipids are soluble in
a. water.
b. salt water.

c.
d.

oil.
All of the above

____ 18. Which organic molecule below is most closely related to lipids?
a. amino acids
c. nucleotides
b. CH2 chains
d. sugars
____ 19. Which organic molecule below is most closely related to nucleic acids?
a. amino acids
c. nucleotides
b. CH2 chains
d. sugars

2

Name: ________________________

ID: A

____ 20. Nucleic acids include
a. chlorophyll and retinal.
b. DNA and RNA.
c. lipids and sugars.
d. glucose and glycogen.
____ 21. Energy is released when the bond between
a. carbon atoms in ATP is broken.
b. ribose and adenine in ATP is broken.
c. phosphate groups in ATP is broken.
d. two ATP molecules is broken.
____ 22. A model of enzyme action is the
a. induced fit model.
b. lipid bilayer model.

c.
d.

____ 23. All of the following are functional groups except
a. a hydroxyl group.
c.
b. an amino group.
d.

activator action model.
active site model.
a carboxyl group.
a carbonate group.

____ 24. A phospholipid molecule contains all of the following except
a. two fatty acids.
c. a phosphate group.
b. three fatty acids.
d. glycerol.
____ 25. Without enzymes, the chemical reactions in the body would
a. happen too fast.
b. occur at much the same rate as they do with enzymes.
c. require a different pH.
d. occur too slowly to support life processes.
____ 26. Carbon atoms can bond together to form all of the following except
a. ring structures.
c. straight chain structures.
b. inorganic structures.
d. branched structures.
Completion
Complete each statement.
27. Because carbon atoms have four electrons in their outermost energy level, they can form up to
____________________ covalent bonds with other atoms.
28. In the molecule that has the chemical formula C2H4, the carbon atoms are bonded together with a
____________________ bond.
29. In a condensation reaction, two molecules become linked together and a molecule of
____________________ is produced.
30. 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.

3

Name: ________________________

ID: A

31. Lipids are ____________________ molecules because they have no negative and positive poles.
32. A substrate attaches to the ____________________ of an enzyme.
33. In a triple bond, ____________________ pair(s) of electrons is (are) shared between two atoms.
34. ATP contains ____________________ phosphate groups.
Problem
35. You are given four test tubes containing purified biological macromolecules. The test tubes are unlabeled
except for a number between 1 and 4. You are told that one test tube contains a protein, one contains a lipid,
one contains a carbohydrate, and one contains a nucleic acid. You then perform some tests on the
macromolecules and collect the following information:
1) Test tubes #2 and #4 contain nitrogen, but the other tubes do not.
2) The contents of test tube #3 are not soluble in water, but the contents of the other test tubes are soluble in
water.
3) The contents of test tube #1 can be broken down into subunits that are all exactly identical to each other.
4) The macromolecule in test tube #2 is found to have a globular shape.
What are the identities of the macromolecules present in the four test tubes? Write your answer in the space
below.

4

ID: A

Biology: Chapter 3 – Biochemistry
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.

ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:

A
D
D
C
D
D
B
A
C
B
A
C
B
D
B
A
C
B
C
B
C
A
D
B
D
B

PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
PTS:
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PTS:
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PTS:
PTS:
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PTS:
PTS:
PTS:
PTS:
PTS:

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

DIF:
DIF:
DIF:
DIF:
DIF:
DIF:
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DIF:

1
2
2
2
1
1
1
1
1
1
1
1
2
1
1
2
1
2
1
1
1
1
1
2
1
2

PTS: 1
28. ANS: double

DIF:

1

OBJ: 3-1.2

PTS: 1
29. ANS: water

DIF:

3

OBJ: 3-1.2

PTS: 1

DIF:

1

OBJ: 3-1.4

COMPLETION
27. ANS:
four
4

1

OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:
OBJ:

3-1.1
3-1.2
3-1.3
3-1.4
3-2.1
3-2.1
3-2.1
3-2.1
3-2.1
3-2.2
3-2.2
3-2.2
3-2.4
3-2.4
3-2.4
3-2.4
3-2.4
3-2.4
3-2.5
3-2.5
3-1.5
3-2.3
3-1.3
3-1.5
3-2.3
3-1.1

ID: A
30. ANS: condensation, hydrolysis
PTS: 1
31. ANS: nonpolar

DIF:

1

OBJ: 3-1.4

PTS: 1
32. ANS: active site

DIF:

1

OBJ: 3-2.4

PTS: 1
33. ANS:
three
3

DIF:

1

OBJ: 3-2.3

PTS: 1
34. ANS:
three
3

DIF:

1

OBJ: 3-1.2

PTS: 1

DIF:

1

OBJ: 3-1.5

PROBLEM
35. ANS:
Test tube #1 contains a carbohydrate.
Test tube #2 contains a protein.
Test tube #3 contains a lipid.
Test tube #4 contains a nucleic acid.
PTS: 1

DIF:

2

OBJ: 3-2.2

2