AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
In his transformation experiments, what did Griffith observe?
a. Mutant mice were resistant to bacterial infections.
b. Mixing a heat-killed pathogenic strain of bacteria with a
living nonpathogenic
strain can convert some of the living cells into the pathogenic
form.
c. Mixing a heat-killed nonpathogenic strain of bacteria with a
living pathogenic
strain makes the pathogenic strain nonpathogenic.
d. Infecting mice with nonpathogenic strains of bacteria
makes them resistant to
pathogenic strains.
e. Mice infected with a pathogenic strain of bacteria can
spread the infection to other
mice. - Correct Answers ✅b
2. What does transformation involve in bacteria?
a. the creation of a strand of DNA from an RNA molecule
b. the creation of a strand of RNA from a DNA molecule
c. the infection of cells by a phage DNA molecule
d. the type of semiconservative replication shown by DNA
e. assimilation of external DNA into a cell - Correct Answers
✅e
,AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
3. The following scientists made significant contributions to
our understanding of the structure and
function of DNA. Place the scientists' names in the correct
chronological order, starting with the first
scientist(s) to make a contribution.
I. Avery, McCarty, and MacLeod
II. Griffith
III. Hershey and Chase
IV. Meselson and Stahl
V. Watson and Crick
a. V, IV, II, I, III
b. II, I, III, V, IV
c. I, II, III, V, IV
d. I, II, V, IV, III
e. II, III, IV, V, I - Correct Answers ✅b
4. Cytosine makes up 38% of the nucleotides in a sample of
DNA from an organism. Approximately
what percentage of the nucleotides in this sample will be
thymine?
a. 12
b. 24
c. 31
d. 38
,AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
e. It cannot be determined from the information provided. -
Correct Answers ✅a
5. Chargaff's analysis of the relative base composition of DNA
was significant because he was able to
show that
a. the relative proportion of each of the four bases differs
within individuals of a
species.
b. the human genome is more complex than that of other
species.
c. the amount of A is always equivalent to T, and C to G.
d. the amount of ribose is always equivalent to deoxyribose.
e. transformation causes protein to be brought into the cell. -
Correct Answers ✅c
6. Which of the following can be determined directly from X-
ray diffraction photographs of
crystallized DNA?
a. the diameter of the helix
b. the rate of replication
c. the sequence of nucleotides
d. the bond angles of the subunits
e. the frequency of A vs. T nucleotides - Correct Answers
✅a
, AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
7. Why does the DNA double helix have a uniform diameter?
a. Purines pair with pyrimidines.
b. C nucleotides pair with A nucleotides.
c. Deoxyribose sugars bind with ribose sugars.
d. Nucleotides bind with nucleosides.
e. Nucleotides bind with nucleoside triphosphates. - Correct
Answers ✅a
8. What kind of chemical bond is found between paired bases
of the DNA double helix?
a. hydrogen
b. ionic
c. covalent
d. sulfhydryl
e. phosphate - Correct Answers ✅a
9. In an analysis of the nucleotide composition of DNA, which
of the following will be found?
a. A = C
b. A = G and C = T
c. A + C = G + T
d. G + C = T + A - Correct Answers ✅c
Exam Questions with Complete Solutions
In his transformation experiments, what did Griffith observe?
a. Mutant mice were resistant to bacterial infections.
b. Mixing a heat-killed pathogenic strain of bacteria with a
living nonpathogenic
strain can convert some of the living cells into the pathogenic
form.
c. Mixing a heat-killed nonpathogenic strain of bacteria with a
living pathogenic
strain makes the pathogenic strain nonpathogenic.
d. Infecting mice with nonpathogenic strains of bacteria
makes them resistant to
pathogenic strains.
e. Mice infected with a pathogenic strain of bacteria can
spread the infection to other
mice. - Correct Answers ✅b
2. What does transformation involve in bacteria?
a. the creation of a strand of DNA from an RNA molecule
b. the creation of a strand of RNA from a DNA molecule
c. the infection of cells by a phage DNA molecule
d. the type of semiconservative replication shown by DNA
e. assimilation of external DNA into a cell - Correct Answers
✅e
,AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
3. The following scientists made significant contributions to
our understanding of the structure and
function of DNA. Place the scientists' names in the correct
chronological order, starting with the first
scientist(s) to make a contribution.
I. Avery, McCarty, and MacLeod
II. Griffith
III. Hershey and Chase
IV. Meselson and Stahl
V. Watson and Crick
a. V, IV, II, I, III
b. II, I, III, V, IV
c. I, II, III, V, IV
d. I, II, V, IV, III
e. II, III, IV, V, I - Correct Answers ✅b
4. Cytosine makes up 38% of the nucleotides in a sample of
DNA from an organism. Approximately
what percentage of the nucleotides in this sample will be
thymine?
a. 12
b. 24
c. 31
d. 38
,AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
e. It cannot be determined from the information provided. -
Correct Answers ✅a
5. Chargaff's analysis of the relative base composition of DNA
was significant because he was able to
show that
a. the relative proportion of each of the four bases differs
within individuals of a
species.
b. the human genome is more complex than that of other
species.
c. the amount of A is always equivalent to T, and C to G.
d. the amount of ribose is always equivalent to deoxyribose.
e. transformation causes protein to be brought into the cell. -
Correct Answers ✅c
6. Which of the following can be determined directly from X-
ray diffraction photographs of
crystallized DNA?
a. the diameter of the helix
b. the rate of replication
c. the sequence of nucleotides
d. the bond angles of the subunits
e. the frequency of A vs. T nucleotides - Correct Answers
✅a
, AP Bio Genetics, RNA, and DNA Practice
Exam Questions with Complete Solutions
7. Why does the DNA double helix have a uniform diameter?
a. Purines pair with pyrimidines.
b. C nucleotides pair with A nucleotides.
c. Deoxyribose sugars bind with ribose sugars.
d. Nucleotides bind with nucleosides.
e. Nucleotides bind with nucleoside triphosphates. - Correct
Answers ✅a
8. What kind of chemical bond is found between paired bases
of the DNA double helix?
a. hydrogen
b. ionic
c. covalent
d. sulfhydryl
e. phosphate - Correct Answers ✅a
9. In an analysis of the nucleotide composition of DNA, which
of the following will be found?
a. A = C
b. A = G and C = T
c. A + C = G + T
d. G + C = T + A - Correct Answers ✅c
