Question 1

Replication always proceeds by adding new bases to the

Accepted Answer

A) 1' end. 
B) 2' end. 
C) 3' end. 
D) 4' enD. 
E) 5' end. 
A) 1' end. 
B) 2' end. 
C) 3' end. 
D) 4' enD. 
E) 5' end.

Question 2

As the two strands of DNA are unraveled,an enzyme relieves the strain on the two strands.The enzyme is

Accepted Answer

A) DNA polymerase. 
B) DNA ligase. 
C) DNA gyrase. 
D) DNA endonuclease. 
E) DNA exonucleasE. 
A) DNA polymerase. 
B) DNA ligase. 
C) DNA gyrase. 
D) DNA endonuclease. 
E) DNA exonucleasE.

Question 3

If an

Accepted Answer

A) Repair would take place through replication and recombination during sister chromatid paring. 
B) Inaccurate replication of the genome would eventually result in cell death. 
C) uvr B or C would handle the repair of the thymine dimer. 
D) It would have no lasting effects. 
E) coli strain were phr (no photoreactivation),uvrA (no excision repair),and recA (no SOS repair),what do you expect would be the result of thymine dimer formation? 
A) Repair would take place through replication and recombination during sister chromatid paring. 
B) Inaccurate replication of the genome would eventually result in cell death. 
C) uvr B or C would handle the repair of the thymine dimer. 
D) It would have no lasting effects. 
E) coli strain were phr (no photoreactivation),uvrA (no excision repair),and recA (no SOS repair),what do you expect would be the result of thymine dimer formation?

Question 4

The method of DNA replication,where each original strand is used as a template to build a new strand,is called the

Accepted Answer

A) conservative method. 
B) semiconservative method. 
C) disruptive method. 
D) continuous methoD. 
E) replication and amplification method. 
A) conservative method. 
B) semiconservative method. 
C) disruptive method. 
D) continuous methoD. 
E) replication and amplification method.

Question 5

In 1952,Hershey and Chase confirmed Avery's (1944)results that

Accepted Answer

A) proteins were the repositories for hereditary information. 
B) DNA was the repository for hereditary information. 
C) RNA was the repository for hereditary information. 
D) proteins and DNA were the repositories for hereditary information. 
E) transformation in bacterial cells induced changes in the host's somatic cells. 
A) proteins were the repositories for hereditary information. 
B) DNA was the repository for hereditary information. 
C) RNA was the repository for hereditary information. 
D) proteins and DNA were the repositories for hereditary information. 
E) transformation in bacterial cells induced changes in the host's somatic cells.

Question 6

Which of the following enzymes removes the primers used for DNA replication?

Accepted Answer

A) DNA pol I 
B) DNA pol II 
C) DNA pol III 
D) DNA pol I,DNA pol II,and DNA pol III can all remove primers 
A) DNA pol I 
B) DNA pol II 
C) DNA pol III 
D) DNA pol I,DNA pol II,and DNA pol III can all remove primers

Question 7

What would be the effect on DNA replication if the helicase was unable to hydrolyze ATP?

Accepted Answer

A) Helicases use the energy of ATP hydrolysis to unwind the strands of DNA during replication.Although,some DNA polymerases can unwind DNA as they synthesize new DNA,helicases make the process is much more efficient.If helicases cannot hydrolyze ATP,they cannot properly unwind the DNA,and replication would be slowed. 
B) Helicases use the energy of ATP hydrolysis to wind the strands of DNA during replication.Although,some DNA polymerases can wind DNA as they synthesize new DNA,helicases make the process is much more efficient.If helicases cannot hydrolyze ATP,they cannot properly wind the DNA,and replication would be slowed. 
C) Helicases unwind the strands of DNA during replication.If helicases cannot hydrolyze ATP,they cannot unwind the DNA,and replication would be stopped. 
A) Helicases use the energy of ATP hydrolysis to unwind the strands of DNA during replication.Although,some DNA polymerases can unwind DNA as they synthesize new DNA,helicases make the process is much more efficient.If helicases cannot hydrolyze ATP,they cannot properly unwind the DNA,and replication would be slowed. 
B) Helicases use the energy of ATP hydrolysis to wind the strands of DNA during replication.Although,some DNA polymerases can wind DNA as they synthesize new DNA,helicases make the process is much more efficient.If helicases cannot hydrolyze ATP,they cannot properly wind the DNA,and replication would be slowed. 
C) Helicases unwind the strands of DNA during replication.If helicases cannot hydrolyze ATP,they cannot unwind the DNA,and replication would be stopped.

Question 8

Since both the strands of a DNA molecule are complimentary to each other,either one of the strands can be used as a _______ to reconstruct the other.

Accepted Answer

A) copy 
B) basis 
C) compass 
D) template 
A) copy 
B) basis 
C) compass 
D) template

Question 9

In Griffith's transformation experiments,

Accepted Answer

A) mice infected with live R form caused pneumonia and death in the mice. 
B) the R form transformed the S form into a virulent variety. 
C) mice infected with heat-killed S form and live R form caused pneumonia and death in the mice. 
D) the S form lacked an enzyme involved in the manufacture of the polysaccharide coat,leading to the abnormally smooth colonies. 
A) mice infected with live R form caused pneumonia and death in the mice. 
B) the R form transformed the S form into a virulent variety. 
C) mice infected with heat-killed S form and live R form caused pneumonia and death in the mice. 
D) the S form lacked an enzyme involved in the manufacture of the polysaccharide coat,leading to the abnormally smooth colonies.

Question 10

The processivity of a polymerase is a measure of how fast it can copy a DNA template.A polymerase with a high processivity has a high speed,while a polymerase with a low processivity has a slow speed.Given this information,how does processivity relate to the sensitivity and error rate of a polymerase?

Accepted Answer

A) high processivity = high sensitivity and high error rate 
B) high processivity = high sensitivity and low error rate 
C) high processivity = low sensitivity and high error rate 
D) high processivity = low sensitivity and low error rate 
A) high processivity = high sensitivity and high error rate 
B) high processivity = high sensitivity and low error rate 
C) high processivity = low sensitivity and high error rate 
D) high processivity = low sensitivity and low error rate

Question 11

Hershey-Chase concluded from their experiment with T2 bacteriophage that

Accepted Answer

A) proteins are the genetic material. 
B) polysaccharide coat contains the genetic material. 
C) DNA is the genetic material. 
D) viruses are needed for DNA to function. 
E) DNA contains sulfur. 
A) proteins are the genetic material. 
B) polysaccharide coat contains the genetic material. 
C) DNA is the genetic material. 
D) viruses are needed for DNA to function. 
E) DNA contains sulfur.

Question 12

Deoxyribose has a "free arm," a carbon that is not a member of the pentose ring.To which direction does this "free arm" face?

Accepted Answer

A) in the same direction as which the coding strand is read 
B) in the opposite direction from which the coding strand is read 
C) toward the nitrogenous bases 
D) toward the O in the five carbon ring 
A) in the same direction as which the coding strand is read 
B) in the opposite direction from which the coding strand is read 
C) toward the nitrogenous bases 
D) toward the O in the five carbon ring

Question 13

Fourteen percent of the DNA nucleotides from a certain organism contain T.What amounts of the other bases would you expect to be present in this particular DNA?

Accepted Answer

A) 14 % A,0% C,36 % G 
B) 14 % A,36 % C,14 % G 
C) 14 % A,36 % C,36 % G 
D) 14 % T,38 % C,36 % G 
E) 14 % T,36 % C,36 % U 
A) 14 % A,0% C,36 % G 
B) 14 % A,36 % C,14 % G 
C) 14 % A,36 % C,36 % G 
D) 14 % T,38 % C,36 % G 
E) 14 % T,36 % C,36 % U

Question 14

If the $\beta$ subunit of DNA pol III had a mutation that affected its sliding clamp configuration,which of the following would be most affected?

Accepted Answer

A) DNA unwinding 
B) supercoiling 
C) proper formation of the replication fork 
D) processivity 
A) DNA unwinding 
B) supercoiling 
C) proper formation of the replication fork 
D) processivity

Question 15

When DNA is replicated during S of the cell cycle,the sequence is maintained but the double strand is not.Each strand of the original double strand accompanies its new complement strand.This process is known as the

Accepted Answer

A) disruptive DNA replication. 
B) conservative DNA replication. 
C) semiconservative DNA replication. 
D) dispersive DNA replication. 
E) stabilizing DNA replication. 
A) disruptive DNA replication. 
B) conservative DNA replication. 
C) semiconservative DNA replication. 
D) dispersive DNA replication. 
E) stabilizing DNA replication.

Question 16

The double helix model was proposed by

Accepted Answer

A) Watson and Crick. 
B) Griffith. 
C) Avery. 
D) Franklin. 
E) Beadle and Tatum. 
A) Watson and Crick. 
B) Griffith. 
C) Avery. 
D) Franklin. 
E) Beadle and Tatum.

Question 17

Why does DNA pol I carry the number one when it is not the polymerase responsible for the bulk of DNA synthesis?

Accepted Answer

A) DNA pol I was the first polymerase isolated from 
B) DNA pol I is the first polymerase to be activated during DNA replication. 
C) DNA pol I is the only polymerase that has both 3' to 5' and 5' to 3' exonuclease activity. 
D) DNA pol I is the smallest polymerase. 
E) coli. 
A) DNA pol I was the first polymerase isolated from 
B) DNA pol I is the first polymerase to be activated during DNA replication. 
C) DNA pol I is the only polymerase that has both 3' to 5' and 5' to 3' exonuclease activity. 
D) DNA pol I is the smallest polymerase. 
E) coli.

Question 18

Which of the following statements about the Hershey-Chase experiment is false?

Accepted Answer

A) DNA was labeled with radioactive phosphorus. 
B) Protein was labeled with radioactive sulfur. 
C) The virus-infected bacteria showed radioactive phosphorus. 
D) The virus-infected bacteria contained radioactive sulfur. 
A) DNA was labeled with radioactive phosphorus. 
B) Protein was labeled with radioactive sulfur. 
C) The virus-infected bacteria showed radioactive phosphorus. 
D) The virus-infected bacteria contained radioactive sulfur.

Question 19

___ is(are)the genetic material for all cellular organisms and some viruses.

Accepted Answer

A) RNA 
B) DNA 
C) Mitochondria 
D) Chromosomes 
A) RNA 
B) DNA 
C) Mitochondria 
D) Chromosomes

Question 20

The DNA double helix is similar to a twisted ladder.What makes up the sides holding the rungs together?

Accepted Answer

A) phosphate groups only 
B) alternating units of phosphate groups and sugars 
C) sugars only 
D) purines and pyrimidines 
A) phosphate groups only 
B) alternating units of phosphate groups and sugars 
C) sugars only 
D) purines and pyrimidines

Exam 14: Dna: the Genetic Material

Replication always proceeds by adding new bases to the

As the two strands of DNA are unraveled,an enzyme relieves the strain on the two strands.The enzyme is

If an

The method of DNA replication,where each original strand is used as a template to build a new strand,is called the

In 1952,Hershey and Chase confirmed Avery's (1944)results that

Which of the following enzymes removes the primers used for DNA replication?

What would be the effect on DNA replication if the helicase was unable to hydrolyze ATP?

Since both the strands of a DNA molecule are complimentary to each other,either one of the strands can be used as a _______ to reconstruct the other.

In Griffith's transformation experiments,

Hershey-Chase concluded from their experiment with T2 bacteriophage that

Deoxyribose has a "free arm," a carbon that is not a member of the pentose ring.To which direction does this "free arm" face?

Fourteen percent of the DNA nucleotides from a certain organism contain T.What amounts of the other bases would you expect to be present in this particular DNA?

If the β\betaβ subunit of DNA pol III had a mutation that affected its sliding clamp configuration,which of the following would be most affected?

When DNA is replicated during S of the cell cycle,the sequence is maintained but the double strand is not.Each strand of the original double strand accompanies its new complement strand.This process is known as the

The double helix model was proposed by

Why does DNA pol I carry the number one when it is not the polymerase responsible for the bulk of DNA synthesis?

Which of the following statements about the Hershey-Chase experiment is false?

___ is(are)the genetic material for all cellular organisms and some viruses.

The DNA double helix is similar to a twisted ladder.What makes up the sides holding the rungs together?

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If the $\beta$ subunit of DNA pol III had a mutation that affected its sliding clamp configuration,which of the following would be most affected?