Question 1

DNA polymerase requires a(n)

Accepted Answer

A)  amino acid primer.
B)  lipid primer.
C)  hydrophilic primer.
D)  DNA primer.
E)  RNA primer.F) All of the above
G) B) and C)

Question 2

DNA consists of two antiparallel strands of nucleotide chains held together by

Accepted Answer

A)  peptide bonds.
B)  polar covalent bonds.
C)  ionic bonds.
D)  hydrogen bonds.
E)  complementary base pairing bonds.F) B) and D)
G) All of the above D

Question 3

In which of the following cells might you expect to find the highest level of telomerase?

Accepted Answer

A)  muscle cells
B)  oocytes
C)  neurons
D)  cells that replenish the lining of the gutE) None of the above
F) A) and B)

Question 4

The two strands in the DNA molecule contain nitrogen bases which are

Accepted Answer

A)  identical.
B)  parallel.
C)  complementary.
D)  the same in all species.
E)  exact copies of the protein they makE.F) A) and B)
G) B) and E)

Question 5

Which of the following DNA replicating enzymes is responsible for unwinding the double helix of DNA?

Accepted Answer

A)  DNA primase
B)  DNA polymerase I
C)  DNA helicase
D)  DNA gyrase
E)  DNA ligaseF) A) and E)
G) None of the above

Question 6

The chemical bonds that stabilize the complimentary nitrogen bases into a double helix are

Accepted Answer

A)  nitrogen bonds.
B)  hydrogen bonds.
C)  hydrophobic bonds.
D)  peptide bonds.
E)  phosphodiester bonds.F) All of the above
G) B) and D)

Question 7

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Accepted Answer

A)  C = C bond.
B)  hydrogen bond.
C)  hydrophobic bond.
D)  phosphodiester bonD.
E)  peptide bond.F) C) and E)
G) A) and E)

Question 8

Avery and his coworkers showed the "transforming principle" as

Accepted Answer

A)  protein.
B)  polysaccharide.
C)  DNA.
D)  RNA.
E)  lipid.F) A) and E)
G) None of the above C

Question 9

Endonucleases and exonucleases are enzymes that can remove nucleotides.An endonuclease _______ while an exonuclease ______________.

Accepted Answer

A)  chews away at the 5' end of DNA;cuts DNA internally
B)  chews away at a 3' end of DNA;cuts the 5' end of DNA
C)  cuts DNA internally;chews away at the end of DNA
D)  adds nucleotides internally to DNA;adds nucleotides on the 3' and 5' ends of DNAE) A) and B)
F) A) and C) C

Question 10

X-ray crystallography of purified DNA fibers shows a pattern that suggests a helical structure,and provides dimensions of that structure.

Accepted Answer

A)  Hershey and Chase
B)  Chargaff
C)  Franklin
D)  Watson and CrickE) A) and B)
F) A) and C)

Question 11

The replisome has two main subcomponents.They are

Accepted Answer

A)  the replication folk and the sliding clamp subunit.
B)  the primosome and the sliding clamp subunit.
C)  the replication folk and the DNA pol III enzymes.
D)  the DNA pol III enzymes and the sliding clamp subunits.
E)  the primosome and a complex of two DNA pol III enzymes.F) A) and C)
G) B) and C)

Question 12

When nonvirulent bacteria were mixed with dead virulent bacteria,Griffith unexpectedly found that the injected mice died.He explained this behavior by suggesting the nonvirulent strain of bacteria as being

Accepted Answer

A)  activated.
B)  transformed.
C)  translated.
D)  transcribeD.
E)  expressed.F) C) and D)
G) B) and D)

Question 13

You are asked to give a classroom demonstration of DNA supercoiling.To do so,you take two different colored pieces of rubber tubing,twist them very tightly and excessively around each other and join the ends of the tubing appropriately.Next,you remove the supercoiling by breaking one strand and unwinding it.In this demonstration,the breaking and winding simulates the action of

Accepted Answer

A)  exonucleases.
B)  polymerases.
C)  helicases.
D)  topoisomerases.E) A) and B)
F) A) and C)

Question 14

The site of the opening of the DNA strands where active replication occurs is referred to as the

Accepted Answer

A)  replication folk.
B)  replisome.
C)  primosome.
D)  DNA pol III complex of two enzymes.
E)  sliding clamp subunit.F) All of the above
G) A) and C)

Question 15

Which of the following is not a component of nucleic acids?

Accepted Answer

A)  organic nitrogen bases
B)  sugar
C)  phosphate
D)  proteinE) A) and B)
F) A) and C)

Question 16

You are asked to participate in a clinical trial for a new drug that can activate telomerase.Which of the following is a likely risk of such a drug?

Accepted Answer

A)  decreased capacity for tissue repair
B)  increased vulnerability to cancer
C)  premature aging
D)  decreased telomere lengthE) None of the above
F) A) and B)

Question 17

Avery,MacLeod,and McCarty's experiments revealed that the transforming principle had all of the following properties except

Accepted Answer

A)  its activity was destroyed by treatment with proteases.
B)  its activity was unaffected by RNA-digesting enzymes.
C)  its activity was unaffected by lipid extraction.
D)  its activity was destroyed by treatment with DNA endonucleases.E) A) and C)
F) B) and D)

Question 18

The lagging strand is replicated with stretches of Okazaki fragments and that is why its synthesis is considered to be

Accepted Answer

A)  discontinuous.
B)  continuous.
C)  primed.
D)  never stopping.
E)  semiconservativE.F) A) and D)
G) A) and C)

Question 19

The enzyme that catalyzes the synthesis of new DNA molecules is called

Accepted Answer

A)  DNA ligase.
B)  DNA polymerase.
C)  DNA gyrase.
D)  DNA helicase.
E)  DNA endonucleasE.F) C) and D)
G) None of the above

Question 20

When injected into a bacterial cell by T2 virus particles,the material that specifies the new generation of viruses is DNA and not protein.

Accepted Answer

A)  Hershey and Chase
B)  Chargaff
C)  Franklin
D)  Watson and CrickE) B) and C)
F) None of the above

Exam 14: Dna: the Genetic Material

DNA polymerase requires a(n)

Correct Answer
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DNA consists of two antiparallel strands of nucleotide chains held together by

Correct Answer
verified
D

In which of the following cells might you expect to find the highest level of telomerase?

Correct Answer
verified

The two strands in the DNA molecule contain nitrogen bases which are

Correct Answer
verified

Which of the following DNA replicating enzymes is responsible for unwinding the double helix of DNA?

Correct Answer
verified

The chemical bonds that stabilize the complimentary nitrogen bases into a double helix are

Correct Answer
verified

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Correct Answer
verified

Avery and his coworkers showed the "transforming principle" as

Correct Answer
verified
C

Endonucleases and exonucleases are enzymes that can remove nucleotides.An endonuclease _ while an exonuclease ________.

Correct Answer
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C

X-ray crystallography of purified DNA fibers shows a pattern that suggests a helical structure,and provides dimensions of that structure.

Correct Answer
verified

The replisome has two main subcomponents.They are

Correct Answer
verified

When nonvirulent bacteria were mixed with dead virulent bacteria,Griffith unexpectedly found that the injected mice died.He explained this behavior by suggesting the nonvirulent strain of bacteria as being

Correct Answer
verified

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The site of the opening of the DNA strands where active replication occurs is referred to as the

Correct Answer
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Which of the following is not a component of nucleic acids?

Correct Answer
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You are asked to participate in a clinical trial for a new drug that can activate telomerase.Which of the following is a likely risk of such a drug?

Correct Answer
verified

Avery,MacLeod,and McCarty's experiments revealed that the transforming principle had all of the following properties except

Correct Answer
verified

The lagging strand is replicated with stretches of Okazaki fragments and that is why its synthesis is considered to be

Correct Answer
verified

The enzyme that catalyzes the synthesis of new DNA molecules is called

Correct Answer
verified

When injected into a bacterial cell by T2 virus particles,the material that specifies the new generation of viruses is DNA and not protein.

Correct Answer
verified

Exam 14: Dna: the Genetic Material

DNA polymerase requires a(n)

Correct AnswerverifiedShow Answer

DNA consists of two antiparallel strands of nucleotide chains held together by

Correct AnswerverifiedD

In which of the following cells might you expect to find the highest level of telomerase?

Correct AnswerverifiedShow Answer

The two strands in the DNA molecule contain nitrogen bases which are

Correct AnswerverifiedShow Answer

Which of the following DNA replicating enzymes is responsible for unwinding the double helix of DNA?

Correct AnswerverifiedShow Answer

The chemical bonds that stabilize the complimentary nitrogen bases into a double helix are

Correct AnswerverifiedShow Answer

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Correct AnswerverifiedShow Answer

Avery and his coworkers showed the "transforming principle" as

Correct AnswerverifiedC

Endonucleases and exonucleases are enzymes that can remove nucleotides.An endonuclease _______ while an exonuclease ______________.

Correct AnswerverifiedC

X-ray crystallography of purified DNA fibers shows a pattern that suggests a helical structure,and provides dimensions of that structure.

Correct AnswerverifiedShow Answer

The replisome has two main subcomponents.They are

Correct AnswerverifiedShow Answer

When nonvirulent bacteria were mixed with dead virulent bacteria,Griffith unexpectedly found that the injected mice died.He explained this behavior by suggesting the nonvirulent strain of bacteria as being

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The site of the opening of the DNA strands where active replication occurs is referred to as the

Correct AnswerverifiedShow Answer

Which of the following is not a component of nucleic acids?

Correct AnswerverifiedShow Answer

You are asked to participate in a clinical trial for a new drug that can activate telomerase.Which of the following is a likely risk of such a drug?

Correct AnswerverifiedShow Answer

Avery,MacLeod,and McCarty's experiments revealed that the transforming principle had all of the following properties except

Correct AnswerverifiedShow Answer

The lagging strand is replicated with stretches of Okazaki fragments and that is why its synthesis is considered to be

Correct AnswerverifiedShow Answer

The enzyme that catalyzes the synthesis of new DNA molecules is called

Correct AnswerverifiedShow Answer

When injected into a bacterial cell by T2 virus particles,the material that specifies the new generation of viruses is DNA and not protein.

Correct AnswerverifiedShow Answer

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D

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C

Endonucleases and exonucleases are enzymes that can remove nucleotides.An endonuclease _ while an exonuclease ________.

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C

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