Exam Questions with Complete Solutions

AP Bio Genetics, RNA, and DNA Practice Exam Questions with Complete Solutions In his transformation experiments, what did Griffith observe?

• Mutant mice were resistant to bacterial infections.
• Mixing a heat-killed pathogenic strain of bacteria with a

living nonpathogenic strain can convert some of the living cells into the pathogenic form.

• Mixing a heat-killed nonpathogenic strain of bacteria with a

living pathogenic strain makes the pathogenic strain nonpathogenic.

• Infecting mice with nonpathogenic strains of bacteria

makes them resistant to pathogenic strains.

• Mice infected with a pathogenic strain of bacteria can

spread the infection to other mice. - Correct Answers ✅b

• What does transformation involve in bacteria?
• the creation of a strand of DNA from an RNA molecule
• the creation of a strand of RNA from a DNA molecule
• the infection of cells by a phage DNA molecule
• the type of semiconservative replication shown by DNA
• assimilation of external DNA into a cell - Correct Answers

✅e 1 / 4

AP Bio Genetics, RNA, and DNA Practice Exam Questions with Complete Solutions

• 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.

• Avery, McCarty, and MacLeod

II. Griffith III. Hershey and Chase IV. Meselson and Stahl

• Watson and Crick
• V, IV, II, I, III
• II, I, III, V, IV
• I, II, III, V, IV
• I, II, V, IV, III
• II, III, IV, V, I - Correct Answers ✅b
• 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?

• 12
• 24
• 31
• 38 2 / 4

AP Bio Genetics, RNA, and DNA Practice Exam Questions with Complete Solutions

• It cannot be determined from the information provided. -

Correct Answers ✅a

• Chargaff's analysis of the relative base composition of DNA

was significant because he was able to show that

• the relative proportion of each of the four bases differs

within individuals of a species.

• the human genome is more complex than that of other

species.

• the amount of A is always equivalent to T, and C to G.
• the amount of ribose is always equivalent to deoxyribose.
• transformation causes protein to be brought into the cell. -

Correct Answers ✅c

• Which of the following can be determined directly from X-

ray diffraction photographs of crystallized DNA?

• the diameter of the helix
• the rate of replication
• the sequence of nucleotides
• the bond angles of the subunits
• the frequency of A vs. T nucleotides - Correct Answers

✅a 3 / 4

AP Bio Genetics, RNA, and DNA Practice Exam Questions with Complete Solutions

• Why does the DNA double helix have a uniform diameter?
• Purines pair with pyrimidines.
• C nucleotides pair with A nucleotides.
• Deoxyribose sugars bind with ribose sugars.
• Nucleotides bind with nucleosides.
• Nucleotides bind with nucleoside triphosphates. - Correct

Answers ✅a

• What kind of chemical bond is found between paired bases

of the DNA double helix?

• hydrogen
• ionic
• covalent
• sulfhydryl
• phosphate - Correct Answers ✅a
• In an analysis of the nucleotide composition of DNA, which

of the following will be found?

• A = C
• A = G and C = T
• A + C = G + T
• G + C = T + A - Correct Answers ✅c
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