Question 1

Write an essay describing the 3 main steps of DNA replication in the correct order.Be sure to include the key structures involved in the process.

Accepted Answer

Answers will vary but should include the...

Question 2

Which of the following would be transcribed into mRNA?

Accepted Answer

A)  a noncoding gene
B)  a protein-coding gene
C)  a promoter
D)  a ribozymeE) None of the above
F) B) and D)

Question 3

Which statement is NOT true about DNA replication in prokaryotes?

Accepted Answer

A)  Replication begins at a single origin of replication.
B)  Replication is bidirectional from the origin(s) .
C)  Replication occurs at about 1 million base pairs per minute.
D)  Since bacterial cells replicate so rapidly,a second round of replication may begin before the first has been completed.
E)  There are many bacterial chromosomes,with replication occurring in each at the same time.F) All of the above
G) None of the above

Question 4

Which of the following statements applies to the semiconservative nature of DNA replication?

Accepted Answer

A)  The old strands serve as a template for the new strand.
B)  The old strand is pulled apart and reformed into the new strand.
C)  The new strand serves as a template for the old strand.
D)  None of these statements apply to the semiconservative nature of DNA replication.E) B) and C)
F) A) and B)

Question 5

A sample of Chargaff's data on the DNA base composition in various species is provided.Discuss several conclusions that may be drawn from this data.
 $$\begin{array} { | c | c | c | c | c | } 
\hline \text { SPECIES } & \text { A } & \mathrm { T } & \mathrm { G } & \mathrm { C } \
\hline \text { Hurnar1 } & 31.0 & 31.5 & 19.4 & 18.4 \
\hline \text { Fruit fly } & 27.3 & 27.6 & 22.5 & 22.5 \
\hline \text { Corn } & 25.6 & 25.3 & 24.5 & 24.6 \
\hline \text { Neurospora (furgus) } & 23.0 & 23.3 & 27.1 & 26.6 \
\hline \text { E coli (bacteriurn) } & 24.6 & 24.3 & 25.5 & 25.6 \
\hline
\end{array}$$

Accepted Answer

Answers may vary.Several conclusions may...

Question 6

In order to help firmly establish DNA as the genetic material,Hershey and Chase radioactively tagged viral protein in one experiment and radioactively tagged viral RNA in the other experiment.

Accepted Answer

A) True 
 B)False

Question 7

Approximately how many base pairs are improperly matched before being repaired by the DNA polymerase?

Accepted Answer

A)  1 in 10,000
B)  1 in 100,000
C)  1 in 1,000,000
D)  1 in 10,000,000
E)  1 in a billionF) B) and E)
G) A) and B)

Question 8

If a DNA sample contains 13% adenine,what percentage of the sample contains cytosine?

Accepted Answer

A)  13%
B)  37%
C)  26%
D)  74%E) All of the above
F) A) and D)

Question 9

Which of the following statements about DNA replication is NOT correct?

Accepted Answer

A)  Unwinding of the DNA molecule occurs as hydrogen bonds break.
B)  Replication occurs as each base is paired with another exactly like it.
C)  The process is known as semiconservative replication because one old strand is conserved in the new molecule.
D)  The enzyme that catalyzes DNA replication is DNA polymerase.
E)  Complementary base pairs are held together with hydrogen bonds.F) A) and B)
G) All of the above

Question 10

Which of the following statements are true about DNA replication in eukaryotes? Select all that apply.

Accepted Answer

A)  Replication of the entire genome takes about ten minutes.
B)  A replication fork occurs at each growing point of the replicating chromosome(s) .
C)  Eukaryotes have many different chromosomes,with replication occurring in each at the same time.
D)  Replication occurs at the rate of about 500-5000 base pairs per minute.
E)  Multiple sites of replication are present on each chromosome.F) A) and B)
G) A) and E)

Question 11

Codons

Accepted Answer

A)  are each comprised of a triplet of nucleotides.
B)  are unambiguous.
C)  provide the instructions for synthesizing proteins.
D)  All of the choices are correct.E) A) and C)
F) None of the above

Question 12

Determine the number of codon sequences it would require to produce the following amino acid sequence: alanine - proline - serine - isoleucine - stop.

Accepted Answer

A)  It would take 5 codon sequences.
B)  It would take 3 codon sequences.
C)  It would take 6 codon sequences.
D)  It would take 4 codon sequences.E) A) and B)
F) B) and D)

Question 13

One of Chargaff's rules states that

Accepted Answer

A)  A = T and G = C.
B)  A = C and T = G.
C)  A = G and T = C.
D)  A = T + G + C.E) A) and D)
F) A) and C)

Question 14

Which of the following statements is NOT true about the debate over the nature of genetic material?

Accepted Answer

A)  Many scientists believed that DNA was not the genetic material because,with only four types of nucleotides,DNA did not have enough variability to store information.
B)  Scientists focused on carbohydrate and protein in their studies of possible genetic material since they knew that genes were on chromosomes and that chromosomes were made of carbohydrate and protein.
C)  Many scientists thought that proteins had a greater capacity for storing information because proteins contain 20 amino acids that could be sequenced differently.
D)  Some scientists thought that RNA was likely to be the genetic material.E) A) and B)
F) A) and C)

Question 15

Which of the following amino acid chains would be produced from the mRNA sequence AUA-CUU-CCU-AGU-UGA?

Accepted Answer

A)  Isoleucine - leucine - proline - serine - stop
B)  Isoleucine - leucine - stop - proline - serine
C)  Glycine - glutamate - lysine - lysine - stop
D)  Isoleucine - alanine - proline - serine - stopE) A) and B)
F) A) and C)

Question 16

An unknown chemical is analyzed and found to contain the bases thymine and guanine.This chemical is most likely

Accepted Answer

A)  tRNA.
B)  mRNA.
C)  DNA.
D)  rRNA.E) B) and D)
F) None of the above

Question 17

DNA replication is considered semiconservative because

Accepted Answer

A)  it will create three new identical strands when finished.
B)  it uses one old strand as a template for the synthesis of a new strand.
C)  it always replicates in the 3' to 5' prime direction.
D)  it never replicates in the 5' to 3' prime direction.E) None of the above
F) C) and D)

Question 18

If one strand of DNA has the base sequence AAG-CAA,the complementary strand has which of the following sequences?

Accepted Answer

A)  UUC-GUU
B)  TTC-GTT
C)  AAG-CAA
D)  UTC-GTU
E)  TTC-GTGF) B) and C)
G) None of the above

Question 19

Telomerase is an enzyme that unwinds DNA during DNA replication.

Accepted Answer

A) True 
 B)False

Question 20

During DNA replication,the enzyme ________ catalyzes the elongation of new DNA strands.

Accepted Answer

A)  helicase
B)  DNA polymerase
C)  DNA ligase
D)  ATP synthaseE) B) and C)
F) C) and D)

Exam 12: Molecular Biology of the Gene

During DNA replication,the enzyme ________ catalyzes the elongation of new DNA strands.

Correct Answer
verified

Codons

Correct Answer
verified

One of Chargaff's rules states that

Correct Answer
verified

If one strand of DNA has the base sequence AAG-CAA,the complementary strand has which of the following sequences?

Correct Answer
verified

If a DNA sample contains 13% adenine,what percentage of the sample contains cytosine?

Correct Answer
verified

Which of the following statements is NOT true about the debate over the nature of genetic material?

Correct Answer
verified

Telomerase is an enzyme that unwinds DNA during DNA replication.

Correct Answer
verified

Write an essay describing the 3 main steps of DNA replication in the correct order.Be sure to include the key structures involved in the process.

Correct Answer
verified
Answers will vary but should include the...
View Answer

Which of the following statements applies to the semiconservative nature of DNA replication?

Correct Answer
verified

Which of the following statements about DNA replication is NOT correct?

Correct Answer
verified

Which of the following statements are true about DNA replication in eukaryotes? Select all that apply.

Correct Answer
verified

An unknown chemical is analyzed and found to contain the bases thymine and guanine.This chemical is most likely

Correct Answer
verified

Which of the following would be transcribed into mRNA?

Correct Answer
verified

Correct Answer
verified
Answers may vary.Several conclusions may...
View Answer

DNA replication is considered semiconservative because

Correct Answer
verified

Which of the following amino acid chains would be produced from the mRNA sequence AUA-CUU-CCU-AGU-UGA?

Correct Answer
verified

Determine the number of codon sequences it would require to produce the following amino acid sequence: alanine - proline - serine - isoleucine - stop.

Correct Answer
verified

Approximately how many base pairs are improperly matched before being repaired by the DNA polymerase?

Correct Answer
verified

Which statement is NOT true about DNA replication in prokaryotes?

Correct Answer
verified

In order to help firmly establish DNA as the genetic material,Hershey and Chase radioactively tagged viral protein in one experiment and radioactively tagged viral RNA in the other experiment.

Correct Answer
verified

Exam 12: Molecular Biology of the Gene

During DNA replication,the enzyme ________ catalyzes the elongation of new DNA strands.

Correct AnswerverifiedShow Answer

Codons

Correct AnswerverifiedShow Answer

One of Chargaff's rules states that

Correct AnswerverifiedShow Answer

If one strand of DNA has the base sequence AAG-CAA,the complementary strand has which of the following sequences?

Correct AnswerverifiedShow Answer

If a DNA sample contains 13% adenine,what percentage of the sample contains cytosine?

Correct AnswerverifiedShow Answer

Which of the following statements is NOT true about the debate over the nature of genetic material?

Correct AnswerverifiedShow Answer

Telomerase is an enzyme that unwinds DNA during DNA replication.

Correct AnswerverifiedShow Answer

Write an essay describing the 3 main steps of DNA replication in the correct order.Be sure to include the key structures involved in the process.

Correct AnswerverifiedAnswers will vary but should include the...View AnswerShow Answer

Which of the following statements applies to the semiconservative nature of DNA replication?

Correct AnswerverifiedShow Answer

Which of the following statements about DNA replication is NOT correct?

Correct AnswerverifiedShow Answer

Which of the following statements are true about DNA replication in eukaryotes? Select all that apply.

Correct AnswerverifiedShow Answer

An unknown chemical is analyzed and found to contain the bases thymine and guanine.This chemical is most likely

Correct AnswerverifiedShow Answer

Which of the following would be transcribed into mRNA?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAnswers may vary.Several conclusions may...View AnswerShow Answer

DNA replication is considered semiconservative because

Correct AnswerverifiedShow Answer

Which of the following amino acid chains would be produced from the mRNA sequence AUA-CUU-CCU-AGU-UGA?

Correct AnswerverifiedShow Answer

Determine the number of codon sequences it would require to produce the following amino acid sequence: alanine - proline - serine - isoleucine - stop.

Correct AnswerverifiedShow Answer

Approximately how many base pairs are improperly matched before being repaired by the DNA polymerase?

Correct AnswerverifiedShow Answer

Which statement is NOT true about DNA replication in prokaryotes?

Correct AnswerverifiedShow Answer

In order to help firmly establish DNA as the genetic material,Hershey and Chase radioactively tagged viral protein in one experiment and radioactively tagged viral RNA in the other experiment.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
Answers will vary but should include the...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Answers may vary.Several conclusions may...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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