Question 1

Which type of mutation could have the biggest evolutionary consequence?

Accepted Answer

A)   A mutation in a lung cell
B)   A mutation in a kidney cell
C)   A mutation in a stomach cell
D)   A mutation in a germ-line cellE) None of the above
F) A) and C)

Question 2

Based on which of the following pieces of evidence about the transforming agent did Avery conclude that DNA is the hereditary material?

Accepted Answer

A)   The transforming material had the same elements as DNA.
B)   The transforming material was not destroyed by protein-digesting enzymes.
C)   The transforming material was destroyed by DNA-digesting enzymes.
D)   All of the choices are correct.E) A) and B)
F) None of the above

Question 3

A change in the genetic message is called a ____________.

Accepted Answer

mutation

Question 4

When Frederick Griffith infected mice with S.pneumoniae that lacked a capsule,the mice

Accepted Answer

A)   remained healthy.
B)   died of blood poisoning.
C)   became ill but lived.
D)   reproduced quicker.E) A) and B)
F) A) and C)

Question 5

When Griffith injected a mixture of dead S bacteria and live,capsuleless R bacteria,the mice

Accepted Answer

A)   remained healthy.
B)   died of blood poisoning.
C)   became ill but lived.
D)   reproduced quicker.E) B) and C)
F) C) and D)

Question 6

The Hershey-Chase experiment demonstrated that protein,not DNA,is the hereditary material.

Accepted Answer

A) True 
 B)False

Question 7

Meselson and Stahl proved that

Accepted Answer

A)   DNA is the genetic material.
B)   DNA is made from nucleotides.
C)   DNA replicates in a semiconservative manner.
D)   DNA contains nitrogen.E) A) and B)
F) B) and C)

Question 8

The significance of the Griffith,Avery,and Hershey-Chase experiments was that they demonstrated that

Accepted Answer

A)   genes were located on chromosomes.
B)   enzymes transformed bacteria.
C)   proteins were what genes were composed of.
D)   DNA was the molecule of heredity.E) A) and D)
F) None of the above

Question 9

The structure of DNA is called a

Accepted Answer

A)   alpha helix.
B)   beta helix.
C)   double helix.
D)   triple helix.E) All of the above
F) B) and C) C

Question 10

A base substitution will lead to a frame-shift mutation.

Accepted Answer

A) True 
 B)False

Question 11

The building blocks of DNA are called

Accepted Answer

A)   proteins.
B)   bases.
C)   nucleotides.
D)   acids.E) None of the above
F) All of the above

Question 12

If an error is made during DNA replication,mechanisms of DNA repair always correct the mistakes.

Accepted Answer

A) True 
 B)False

Question 13

All of the following can cause mutation except

Accepted Answer

A)   UV light.
B)   mistakes in DNA replication.
C)   centrifuging.
D)   cigarette smoke.
E)   toxic chemicals.F) A) and B)
G) A) and D)

Question 14

Why are deletions or insertions of nucleotides likely to be more detrimental than base substitutions?

Accepted Answer

The answer of Why are deletions or insertions of nucleotides...

Question 15

All of the following are correct about DNA replication except

Accepted Answer

A)   DNA polymerase is the enzyme that adds nucleotides to one another.
B)   DNA polymerase can only synthesize DNA in the 5' to 3' direction.
C)   Helicase is the enzyme which rewinds the DNA after replication is finished.
D)   DNA polymerase can only add nucleotides to an existing strand.
E)   The lagging strand has many primers.F) All of the above
G) B) and E)

Question 16

Which scientists' work first suggested that DNA had the shape of a helix?

Accepted Answer

A)   Wilkins and Franklin
B)   Watson and Crick
C)   Hershey and Chase
D)   Avery,Macleod,and McCarty
E)   Campbell and WilmutF) B) and E)
G) C) and D) A

Question 17

When Frederick Griffith infected mice with a virulent strain of Streptococcus pneumonia,the mice

Accepted Answer

A)   remained healthy.
B)   died of blood poisoning.
C)   became ill but lived.
D)   reproduced quicker.E) A) and B)
F) A) and C)

Question 18

Which choice describes how the DNA molecule replicates?

Accepted Answer

A)   Semiconservative
B)   Dispersive
C)   Conservative
D)   Either dispersive or semiconservative depending on the pH
E)   Either dispersive or conservative depending on the organism.F) None of the above
G) D) and E)

Question 19

Hershey and Chase tagged the DNA of viruses with radioactive phosphorus,and their protein coats with radioactive sulfur.When the viruses were allowed to infect bacteria,what did the viruses transfer to the bacteria?

Accepted Answer

A)   Radioactive phosphorus and sulfur
B)   Radioactive sulfur
C)   DNA
D)   ProteinE) C) and D)
F) A) and C)

Question 20

All of the following are correct about mutations except

Accepted Answer

A)   without mutations,there would be no variation and no evolution.
B)   mutations change the bases in DNA.
C)   a mutation in a somatic cell will be passed on to subsequent generations.
D)   some mutations change the nucleotide sequence of a gene.
E)   some mutations remove nucleotides from a gene.F) B) and C)
G) A) and E)

Exam 11: DNA: The Genetic Material

Which type of mutation could have the biggest evolutionary consequence?

Correct AnswerverifiedShow Answer

Based on which of the following pieces of evidence about the transforming agent did Avery conclude that DNA is the hereditary material?

Correct AnswerverifiedShow Answer

A change in the genetic message is called a ____________.

Correct Answerverifiedmutation

When Frederick Griffith infected mice with S.pneumoniae that lacked a capsule,the mice

Correct AnswerverifiedShow Answer

When Griffith injected a mixture of dead S bacteria and live,capsuleless R bacteria,the mice

Correct AnswerverifiedShow Answer

The Hershey-Chase experiment demonstrated that protein,not DNA,is the hereditary material.

Correct AnswerverifiedShow Answer

Meselson and Stahl proved that

Correct AnswerverifiedShow Answer

The significance of the Griffith,Avery,and Hershey-Chase experiments was that they demonstrated that

Correct AnswerverifiedShow Answer

The structure of DNA is called a

Correct AnswerverifiedC

A base substitution will lead to a frame-shift mutation.

Correct AnswerverifiedShow Answer

The building blocks of DNA are called

Correct AnswerverifiedShow Answer

If an error is made during DNA replication,mechanisms of DNA repair always correct the mistakes.

Correct AnswerverifiedShow Answer

All of the following can cause mutation except

Correct AnswerverifiedShow Answer

Why are deletions or insertions of nucleotides likely to be more detrimental than base substitutions?

Correct AnswerverifiedShow Answer

All of the following are correct about DNA replication except

Correct AnswerverifiedShow Answer

Which scientists' work first suggested that DNA had the shape of a helix?

Correct AnswerverifiedA

When Frederick Griffith infected mice with a virulent strain of Streptococcus pneumonia,the mice

Correct AnswerverifiedShow Answer

Which choice describes how the DNA molecule replicates?

Correct AnswerverifiedShow Answer

Hershey and Chase tagged the DNA of viruses with radioactive phosphorus,and their protein coats with radioactive sulfur.When the viruses were allowed to infect bacteria,what did the viruses transfer to the bacteria?

Correct AnswerverifiedShow Answer

All of the following are correct about mutations except

Correct AnswerverifiedShow Answer

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