5 Steps to a 5 AP Biology, 2014-2015 Edition

AP Biology Practice Exam 2 ❮ 295

55.Which line represents the bag that contained a
solution isotonic to the 0.5 M solution?
A. A
B. B
C. C
D. D

56.Which line represents that bag with the highest
initial concentration of glucose?
A. A
B. B
C. C
D. D

57.Which line or lines represent bags that contain a
solution that is hypertonic at 50 minutes?
A. A and B
B. B
C. C
D. D and E

58.A mutation in a bacterial enzyme changed a pre-
viously polar amino acid into a nonpolar amino
acid. This amino acid was located at a site distant
from the enzyme’s active site. How might this
mutation alter the enzyme’s substrate specificity?
A. By changing the enzyme’s pH optimum
B. By changing the enzyme’s location in the cell
C. By changing the shape of the protein
D. An amino acid change away from the active
site cannot alter the enzyme’s substrate
specificity.

Use the following picture of DNA to answer ques-

tions 59 and 60:

template strand 5 ′___________ 3′

complementary strand 3 ′___________ 5′

59.Based on the preceding picture, which direction

would RNA polymerase move?

A. 3′→ 5 ′along the template strand

B. 3′→ 5 ′along the complementary strand

C. 5′→ 3 ′along the template strand

D. 5′→ 3 ′along the complementary strand

60.If the DNA segment is a transcriptional unit,

where would the promoter be located?

A. To the left of the complementary strand

B. To the right of the template strand

C. To the left of the template strand

D. To the right of the complementary strand

61.A single gene from five related species of leafhop-

per was compared, and the nucleotide differences

between the genes are as shown in the table:

Which of the following phylogenetic trees best shows

the correct evolutionary relationship between the

leafhoppers?

20

B

A

C

D

E

10

0

Percentage
change
in weight

–10

–20

10 20 30

Time (minutes)

40 50

Nucleotide Differences

Species 1 2 3 4 5

1 — 1 8 19 7

2—82 09

3 — 19 2

4— 18

5—

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