AP Biology Practice Exam
Section I: Multiple-Choice Questions
Complete one hundred multiple-choice questions in 80 minutes, worth
60 percent of the total score.
BIOLOGY
SECTION I
Time—80 minutes
100 Questions
Directions: Each of the questions or incomplete statements below is fol-
lowed by five suggested answers or completions. Select the one that is
best in each case.
1. During the evolutionary process, which of the following is the cor-
rect sequence of events?
A. Change in phenotype—
change in genotype—
speciation—
selection
B. Speciation—change in genotype—selection—change in phenotype
C. Speciation—selection—change in phenotype—change in genotype
D. Change in genotype—
change in phenotype—
selection—
speciation
E. Selection—speciation—change in phenotype—change in genotype
2. A lenticel is to a plant as a _______ is to an insect.
A. stoma
B. spiracle
C. trachea
D. mouth
E. siphon
,2 AP Biology
Questions 3–6 refer to the following diagram.
3. Produce digestive enzymes.
A. I, III, and V
B. II, III, and V
C. III, IV, V, and VIII
D. I, III, V, and VII
E. II, III, and IV
4. Produce(s) glucagon.
A. II and IV
B. III
C. V
D. VIII
E. II and V
, AP BIOLOGY PRACTICE EXAM 3
5. Absorbs lipids.
A. III
B. VII
C. VI
D. IV
E. VIII
6. Produce(s) chyme.
A. VIII
B. IV
C. VII and VIII
D. II and IV
E. III
7. A new biological structure has been discovered. It is larger than
most bacteria. Although primarily composed of protein, it is cov-
ered with a lipid-based membrane. Its genetic material is double-
stranded DNA, but the structure lacks RNA. The interior of the
structure has ribosomes and a few enzymes. What is this?
A. A virus
B. A protozoan
C. An alga
D. A bacterium
E. A prion
, 4 AP Biology
8. Dinitrophenol (DNP) is a compound that allows hydrogen ions to
leak across a membrane. This leakage prevents the maintenance of
an H+ gradient. How would this impact a cell?
A. It would permit a greater growth rate, since the cell would no
longer have to spend energy pumping H+ across the membrane.
B. It would permit a greater growth rate, because the equalization
of H+ on both sides of a membrane would help the cell cope
with an acidic environment.
C. If the cell were a neuron, it would have no impact, because the
charge differential on the surface of the neuron membrane is
based on Na+ and K+, not on H+.
D. The cell would lose the bulk of its energy production because
of DNP’s interference with chemiosmosis.
E. It would slow the growth rate slightly, but the cell would com-
pensate by maintaining the function of proton pumps.
9. If you were to take 1.0 ml of a solution of HCl with a pH of 4.0
and add it to 9.0 ml of distilled water, what would be the pH of the
final solution?
A. The pH would remain unchanged.
B. The pH would rise to 5.5.
C. The pH would rise to 5.0.
D. The pH would be unmeasurable due to the amount of dilution.
E. The pH would rise to 7.0.
10. From where do the electrons used in photosynthesis originate?
A. Glucose
B. NAD
C. Photons
D. Chlorophyll
E. Water
Section I: Multiple-Choice Questions
Complete one hundred multiple-choice questions in 80 minutes, worth
60 percent of the total score.
BIOLOGY
SECTION I
Time—80 minutes
100 Questions
Directions: Each of the questions or incomplete statements below is fol-
lowed by five suggested answers or completions. Select the one that is
best in each case.
1. During the evolutionary process, which of the following is the cor-
rect sequence of events?
A. Change in phenotype—
change in genotype—
speciation—
selection
B. Speciation—change in genotype—selection—change in phenotype
C. Speciation—selection—change in phenotype—change in genotype
D. Change in genotype—
change in phenotype—
selection—
speciation
E. Selection—speciation—change in phenotype—change in genotype
2. A lenticel is to a plant as a _______ is to an insect.
A. stoma
B. spiracle
C. trachea
D. mouth
E. siphon
,2 AP Biology
Questions 3–6 refer to the following diagram.
3. Produce digestive enzymes.
A. I, III, and V
B. II, III, and V
C. III, IV, V, and VIII
D. I, III, V, and VII
E. II, III, and IV
4. Produce(s) glucagon.
A. II and IV
B. III
C. V
D. VIII
E. II and V
, AP BIOLOGY PRACTICE EXAM 3
5. Absorbs lipids.
A. III
B. VII
C. VI
D. IV
E. VIII
6. Produce(s) chyme.
A. VIII
B. IV
C. VII and VIII
D. II and IV
E. III
7. A new biological structure has been discovered. It is larger than
most bacteria. Although primarily composed of protein, it is cov-
ered with a lipid-based membrane. Its genetic material is double-
stranded DNA, but the structure lacks RNA. The interior of the
structure has ribosomes and a few enzymes. What is this?
A. A virus
B. A protozoan
C. An alga
D. A bacterium
E. A prion
, 4 AP Biology
8. Dinitrophenol (DNP) is a compound that allows hydrogen ions to
leak across a membrane. This leakage prevents the maintenance of
an H+ gradient. How would this impact a cell?
A. It would permit a greater growth rate, since the cell would no
longer have to spend energy pumping H+ across the membrane.
B. It would permit a greater growth rate, because the equalization
of H+ on both sides of a membrane would help the cell cope
with an acidic environment.
C. If the cell were a neuron, it would have no impact, because the
charge differential on the surface of the neuron membrane is
based on Na+ and K+, not on H+.
D. The cell would lose the bulk of its energy production because
of DNP’s interference with chemiosmosis.
E. It would slow the growth rate slightly, but the cell would com-
pensate by maintaining the function of proton pumps.
9. If you were to take 1.0 ml of a solution of HCl with a pH of 4.0
and add it to 9.0 ml of distilled water, what would be the pH of the
final solution?
A. The pH would remain unchanged.
B. The pH would rise to 5.5.
C. The pH would rise to 5.0.
D. The pH would be unmeasurable due to the amount of dilution.
E. The pH would rise to 7.0.
10. From where do the electrons used in photosynthesis originate?
A. Glucose
B. NAD
C. Photons
D. Chlorophyll
E. Water
