Question 1

In sexual recombination, new combinations of genes are created by which of the following processes?

Accepted Answer

A)   Transduction
B)   Crossing over
C)   Conjugation
D)   TransformationE) None of the above
F) All of the above

Question 2

In a DNA molecule, one end has a free hydroxyl group and one end has a free ___________.

Accepted Answer

A)   phosphate group
B)   hydroxyl group
C)   amino group
D)   carboxyl groupE) B) and C)
F) A) and D)

Question 3

What type of bonds spontaneously form between two complementary strands of DNA?

Accepted Answer

A)   Hydrogen bonds
B)   Covalent bonds
C)   Phosphodiester bonds
D)   Polar covalent bondsE) B) and C)
F) A) and B)

Question 4

Which of the following is a type II restriction enzyme recognition site?

Accepted Answer

A)   GAATTC
B)   GAATTG
C)   GAAAAG
D)   GATCAGE) A) and C)
F) All of the above

Question 5

The lagging DNA strand is synthesized discontinuously producing:

Accepted Answer

A)   Kornberg fragments
B)   Southern fragments
C)   Okazaki fragments
D)   Klenow fragmentsE) All of the above
F) A) and B)

Question 6

Enzymes that recognize palindromic sequences of DNA, that are cut within the recognition sequence, that do not have methylating activity, and that are used frequently in the laboratory are which type of restriction enzymes?

Accepted Answer

A)   Type I
B)   Type II
C)   Type III
D)   Type IVE) All of the above
F) A) and C)

Question 7

In DNA replication, the leading strand is the strand that has which orientation?

Accepted Answer

A)   5to 3
B)   3to 5
C)   Both strands are leading.D) All of the above
E) A) and B)

Question 8

DNA replication is:

Accepted Answer

A)   Conservative
B)   Semiconservative
C)   Nonconservative
D)   DispersiveE) A) and D)
F) A) and B) B

Question 9

Avery, MacLeod, and McCarty identified the nature of Griffith's transforming factor in an experiment where it was destroyed by what treatment?

Accepted Answer

A)   Protease
B)   Ribonuclease
C)   Deoxyribonuclease
D)   HeatingE) All of the above
F) B) and C)

Question 10

What is the fertility factor (F)  observed by Hayes and Lederberg?

Accepted Answer

A)   A chemical that encourages bacterial mating
B)   A virus
C)   A plasmid
D)   A polysaccharide on the cell surfaceE) A) and D)
F) All of the above

Question 11

Nucleotides in DNA consist of which of the following?

Accepted Answer

A)   Nitrogen base, deoxyribose, and phosphate
B)   Nitrogen base, ribose, and sulfur
C)   Carbon base, ribose, and phosphate
D)   Carbon base, glucose, and carboxylE) A) and B)
F) B) and D)

Question 12

DNA contains deoxyribonucleotide triphosphates joined together by what type of covalent bond?

Accepted Answer

A)   Aldehyde
B)   Ester
C)   Phosphodiester
D)   PeptideE) A) and D)
F) A) and C) C

Question 13

Which of the following promote resistance to common antibiotics?

Accepted Answer

A)   Helicases
B)   R factors
C)   Endonucleases
D)   MethylasesE) A) and B)
F) A) and C)

Question 14

DNA replication proceeds with the new daughter strand synthesized in the following orientation:

Accepted Answer

A)   5to 3
B)   3to 5
C)   The daughter strand is not synthesized in any order.
D)   Either 5to 3or 3 to 5E) B) and C)
F) A) and D)

Question 15

The purpose of ligase is to:

Accepted Answer

A)   Synthesize DNA
B)   Cut DNA within the double helix
C)   Chew DNA from the ends
D)   Paste two ends of DNA togetherE) All of the above
F) None of the above

Question 16

Which of the following does not play a role in DNA replication?

Accepted Answer

A)   RNA primer
B)   Deoxynucleotide
C)   Stop codon
D)   DNA polymeraseE) A) and B)
F) None of the above

Question 17

Which DNA sequence is complementary to 5GATTCTCAAAGGACT3?

Accepted Answer

A)   5GATTCTCAAAGGACT3
B)   3GATTCTCAAAGGACT5
C)   3CTAAGAGTTTCCTGA5
D)   5CTAAGAGTTTCCTGA3E) A) and B)
F) A) and D)

Question 18

In a double-stranded DNA molecule, base pairing between strands occurs between:

Accepted Answer

A)   A purine and a purine
B)   A pyrimidine and a pyrimidine
C)   A purine and a pyrimidine
D)   Any type of nucleotide baseE) B) and C)
F) A) and D)

Question 19

What reactions are catalyzed by DNA methyltransferase?

Accepted Answer

A)   Addition of methyl groups to nitrogen bases
B)   Addition of methyl groups to ribose sugars
C)   Addition of methyl groups to proteins
D)   Removal of methyl groups from DNAE) B) and D)
F) C) and D) A

Question 20

In DNA replication, where does replication begin and end?

Accepted Answer

A)   Origin of replication; end of the molecule
B)   Promoter; termination site
C)   Start codon; stop codon
D)   Start codon, termination siteE) All of the above
F) B) and C)

Exam 1: DNA

In sexual recombination, new combinations of genes are created by which of the following processes?

Correct AnswerverifiedShow Answer

In a DNA molecule, one end has a free hydroxyl group and one end has a free ___________.

Correct AnswerverifiedShow Answer

What type of bonds spontaneously form between two complementary strands of DNA?

Correct AnswerverifiedShow Answer

Which of the following is a type II restriction enzyme recognition site?

Correct AnswerverifiedShow Answer

The lagging DNA strand is synthesized discontinuously producing:

Correct AnswerverifiedShow Answer

Enzymes that recognize palindromic sequences of DNA, that are cut within the recognition sequence, that do not have methylating activity, and that are used frequently in the laboratory are which type of restriction enzymes?

Correct AnswerverifiedShow Answer

In DNA replication, the leading strand is the strand that has which orientation?

Correct AnswerverifiedShow Answer

DNA replication is:

Correct AnswerverifiedB

Avery, MacLeod, and McCarty identified the nature of Griffith's transforming factor in an experiment where it was destroyed by what treatment?

Correct AnswerverifiedShow Answer

What is the fertility factor (F) observed by Hayes and Lederberg?

Correct AnswerverifiedShow Answer

Nucleotides in DNA consist of which of the following?

Correct AnswerverifiedShow Answer

DNA contains deoxyribonucleotide triphosphates joined together by what type of covalent bond?

Correct AnswerverifiedC

Which of the following promote resistance to common antibiotics?

Correct AnswerverifiedShow Answer

DNA replication proceeds with the new daughter strand synthesized in the following orientation:

Correct AnswerverifiedShow Answer

The purpose of ligase is to:

Correct AnswerverifiedShow Answer

Which of the following does not play a role in DNA replication?

Correct AnswerverifiedShow Answer

Which DNA sequence is complementary to 5GATTCTCAAAGGACT3?

Correct AnswerverifiedShow Answer

In a double-stranded DNA molecule, base pairing between strands occurs between:

Correct AnswerverifiedShow Answer

What reactions are catalyzed by DNA methyltransferase?

Correct AnswerverifiedA

In DNA replication, where does replication begin and end?

Correct AnswerverifiedShow Answer

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B

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C

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A

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