Question 1

If a mutation produced helicase that was unable to hydrolyze ATP, DNA replication would be

Accepted Answer

A) stopped. 
B) speeded up. 
C) unaffected. 
D) more prone to errors. 
A) stopped. 
B) speeded up. 
C) unaffected. 
D) more prone to errors.

Question 2

Viruses that attack bacteria are called

Accepted Answer

A) phages 
B) proviruses 
C) virulent 
D) lytic 
A) phages 
B) proviruses 
C) virulent 
D) lytic

Question 3

Which statement 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 contained 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 contained radioactive phosphorus. 
D) The virus-infected bacteria contained radioactive sulfur.

Question 4

Nucleotides have a phosphate group attached at the ___ carbon atom of the sugar.

Accepted Answer

A) 2' 
B) 3' 
C) 5' 
D) 1' 
A) 2' 
B) 3' 
C) 5' 
D) 1'

Question 5

Which of the following DNA sequences is complementary to 5' ATGGTCAGT 3'?

Accepted Answer

A) 5' ATGGTCAGT 3' 
B) 5' TGACTGGTA 3' 
C) 5' TACCAGTCA 3' 
D) 5' ACTGACCAT 3' 
A) 5' ATGGTCAGT 3' 
B) 5' TGACTGGTA 3' 
C) 5' TACCAGTCA 3' 
D) 5' ACTGACCAT 3'

Question 6

Why does DNA pol I carry the number one?

Accepted Answer

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

Question 7

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 length 
A) decreased capacity for tissue repair 
B) increased vulnerability to cancer 
C) premature aging 
D) decreased telomere length

Question 8

Replication of DNA is

Accepted Answer

A) conservative. 
B) redundant. 
C) dispersive. 
D) semiconservative. 
A) conservative. 
B) redundant. 
C) dispersive. 
D) semiconservative.

Question 9

After attaching to a bacterial cell, a bacteriophage typically

Accepted Answer

A) injects protein into the cell. 
B) extracts protein from the cell. 
C) injects DNA into the cell. 
D) extracts DNA from the cell. 
A) injects protein into the cell. 
B) extracts protein from the cell. 
C) injects DNA into the cell. 
D) extracts DNA from the cell.

Question 10

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

Accepted Answer

A) discontinuous. 
B) continuous. 
C) bidirectional. 
D) antiparallel. 
A) discontinuous. 
B) continuous. 
C) bidirectional. 
D) antiparallel.

Question 11

During DNA replication, which enzyme removes the RNA primers and then fills in the gap?

Accepted Answer

A) DNA pol I 
B) DNA primase 
C) DNA pol III 
D) DNA ligase 
A) DNA pol I 
B) DNA primase 
C) DNA pol III 
D) DNA ligase

Question 12

The double helix model of DNA structure was proposed by

Accepted Answer

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

Question 13

The two strands of a DNA molecule contain nitrogen bases which are

Accepted Answer

A) identical. 
B) parallel. 
C) complementary. 
D) proportionate. 
A) identical. 
B) parallel. 
C) complementary. 
D) proportionate.

Question 14

Who originally discovered the process of bacterial transformation?

Accepted Answer

A) Watson and Crick 
B) Chargaff 
C) Hershey and Chase 
D) Griffith 
A) Watson and Crick 
B) Chargaff 
C) Hershey and Chase 
D) Griffith

Question 15

Because the two strands of a DNA molecule are ________ to each other, either one can be used as a template to reconstruct the other.

Accepted Answer

A) identical 
B) antiparallel 
C) bound 
D) complementary 
A) identical 
B) antiparallel 
C) bound 
D) complementary

Question 16

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

Accepted Answer

A) muscle cells 
B) adipose tissue cells 
C) neurons 
D) cells that replenish the lining of the gut 
A) muscle cells 
B) adipose tissue cells 
C) neurons 
D) cells that replenish the lining of the gut

Question 17

What is the correct sequence for DNA replication in

Accepted Answer

A) initiation, termination, elongation 
B) initiation, elongation, termination 
C) elongation, termination, initiation 
D) elongation, initiation, termination 
A) initiation, termination, elongation 
B) initiation, elongation, termination 
C) elongation, termination, initiation 
D) elongation, initiation, termination

Question 18

Eukaryotic organisms speed up the process of DNA replication by

Accepted Answer

A) shortening the initiation phase. 
B) producing several sliding clamp complexes which provide more binding sites for DNA pol III. 
C) using DNA gyrase to unravel the double helix rather than DNA helicase. 
D) using multiple origins of replication on each chromosome. 
A) shortening the initiation phase. 
B) producing several sliding clamp complexes which provide more binding sites for DNA pol III. 
C) using DNA gyrase to unravel the double helix rather than DNA helicase. 
D) using multiple origins of replication on each chromosome.

Question 19

If a mutation prevented synthesis of the beta subunit of DNA pol III, which would be most affected?

Accepted Answer

A) DNA unwinding 
B) formation of RNA primers 
C) formation of the replication fork 
D) processivity 
A) DNA unwinding 
B) formation of RNA primers 
C) formation of the replication fork 
D) processivity

Question 20

Suppose a new species of bacterium is discovered.It contains a form of DNA pol III that can add new nucleotides to either the 5' end or the 3' end of an existing strand.All other properties of the enzyme remain unchanged.How would DNA replication in these bacteria differ from normal replication?

Accepted Answer

A) Both new strands could be synthesized continuously like the leading strand. 
B) The same polymerase molecule could synthesize both strands at the same time. 
C) Helicase would no longer be required for replication. 
D) DNA gyrase would no longer be required for replication. 
A) Both new strands could be synthesized continuously like the leading strand. 
B) The same polymerase molecule could synthesize both strands at the same time. 
C) Helicase would no longer be required for replication. 
D) DNA gyrase would no longer be required for replication.

Exam 14: Dna: the Genetic Material

If a mutation produced helicase that was unable to hydrolyze ATP, DNA replication would be

Viruses that attack bacteria are called

Which statement about the Hershey-Chase experiment is false?

Nucleotides have a phosphate group attached at the ___ carbon atom of the sugar.

Which of the following DNA sequences is complementary to 5' ATGGTCAGT 3'?

Why does DNA pol I carry the number one?

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?

Replication of DNA is

After attaching to a bacterial cell, a bacteriophage typically

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

During DNA replication, which enzyme removes the RNA primers and then fills in the gap?

The double helix model of DNA structure was proposed by

The two strands of a DNA molecule contain nitrogen bases which are

Who originally discovered the process of bacterial transformation?

Because the two strands of a DNA molecule are ________ to each other, either one can be used as a template to reconstruct the other.

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

What is the correct sequence for DNA replication in

Eukaryotic organisms speed up the process of DNA replication by

If a mutation prevented synthesis of the beta subunit of DNA pol III, which would be most affected?

Suppose a new species of bacterium is discovered.It contains a form of DNA pol III that can add new nucleotides to either the 5' end or the 3' end of an existing strand.All other properties of the enzyme remain unchanged.How would DNA replication in these bacteria differ from normal replication?

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