Question 1

If the protein coat of a virus that infects a bacterium is labeled with radioactive sulfur and the DNA of the virus is labeled with radioactive phosphorus,over time

Accepted Answer

A)   both the sulfur and the phosphorus will be found within the bacterium.
B)   only the sulfur will be found inside the bacterium.
C)   only the phosphorus will be found inside the bacterium.
D)   both the sulfur and the phosphorus will be found outside the bacterium.
E)   the radioactivity of the sulfur and phosphorus will decay very quickly and not be detectable.F) A) and B)
G) A) and E)

Question 2

Messenger RNA is produced in the

Accepted Answer

A)   cytoplasm.
B)   ribosomes.
C)   nucleus.
D)   endoplasmic reticulum.
E)   lysosome.F) C) and D)
G) A) and B)

Question 3

Which statement is NOT correct about the results of the Hershey-Chase experiment with the T2 virus?

Accepted Answer

A)   Radioactively labeled protein was found in the bacteria, not in the virus coats.
B)   Radioactively labeled DNA was found in the bacteria, not in the virus coats.
C)   DNA was labeled with radioactive phosphorus.
D)   Protein was labeled with radioactive sulfur.
E)   Two separate experiments were actually run, one with radioactive phosphorus and one with radioactive sulfur.F) C) and D)
G) A) and D)

Question 4

Segments of DNA that are NOT part of the gene are called

Accepted Answer

A)   exons.
B)   introns.
C)   transposons.
D)   inducers.
E)   promoters.F) None of the above
G) B) and D)

Question 5

Which of the following does NOT occur when lactose is present in the environment of

Accepted Answer

A)   The lac repressor binds to the operator.
B)   The RNA polymerase binds to the promoter.
C)   Three different genes are transcribed.
D)   The repressor binds to lactose.
E)   The enzymes that break down lactose are synthesized.F) None of the above
G) A) and B)

Question 6

Which of the following nucleotide bases is found only in DNA,not in RNA?

Accepted Answer

A)   guanine
B)   adenine
C)   thymine
D)   uracil
E)   cytosineF) B) and D)
G) None of the above

Question 7

Which is the process by which a protein is constructed in the cytoplasm of eukaryotic cells?

Accepted Answer

A)   translation
B)   transcription
C)   transposition
D)   transformation
E)   translocationF) A) and D)
G) A) and C)

Question 8

The function of transfer RNA is to

Accepted Answer

A)   carry amino acids to ribosomes.
B)   transfer nucleotides to the nucleus.
C)   transmit coded information to the cytoplasm.
D)   turn DNA on and off.
E)   act as the site for protein synthesis.F) A) and B)
G) C) and D)

Question 9

In semi-conservative DNA replication,each new double helix formed will have

Accepted Answer

A)   two new strands and two old strands.
B)   one new and one old strand in each helix.
C)   three new strands in one helix and three old strands in the second helix.
D)   two new and one old strand in one helix and two old and one new strand in second helix.
E)   two new strands in one helix and two old strands in the other helix.F) None of the above
G) A) and E)

Question 10

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 semi-conservative 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) A) and C)

Question 11

Transcription of part of a DNA molecule with a nucleotide sequence of AAACAACTT results in a mRNA molecule with the complementary sequence of

Accepted Answer

A)  GGGAGAACC.
B)  UUUGUUGAA.
C)  TTTGAAGCC.
D)  CCCACCTCC.
E)  AAACAACTT.F) A) and C)
G) A) and B)

Question 12

DNA segments called _____ are at the ends of chromosomes and eventually signal the cell to enter apoptosis.

Accepted Answer

A)   transposons
B)   mutagens
C)   activated chromatin
D)   operons
E)   telomeresF) B) and E)
G) A) and B)

Question 13

Identify the amino acids that would be assembled based upon the following codons: CGG AUA GAC GUA

Accepted Answer

CGG would code for Arginine
AU...

Question 14

The correct sequence of events in the production of a polypeptide is

Accepted Answer

A)   initiation  →\rarr→  termination  →\rarr→  elongation.
B)   elongation  →\rarr→  termination  →\rarr→  initiation.
C)   termination  →\rarr→  elongation  →\rarr→  initiation.
D)   elongation  →\rarr→  initiation  →\rarr→  termination.
E)   initiation  →\rarr→  elongation  →\rarr→  termination. F) B) and E)
G) C) and D)

Question 15

An intervening sequence of DNA that is not expressed is called a(n)

Accepted Answer

A)   exon.
B)   intron.
C)   replicon.
D)   promoter.
E)   gene.F) A) and B)
G) B) and D)

Question 16

Which of the classes of RNA molecules carries the genetic information as it is needed for the construction of a protein?

Accepted Answer

A)   ribosomal RNA
B)   transfer RNA
C)   messenger RNA
D)   primary mRNA transcript
E)   mature RNAF) A) and E)
G) A) and C)

Question 17

Which factor is likely to lead to a change in the genetic control of the individual and possibly cancer?

Accepted Answer

A)   X-rays
B)   ultraviolet radiation
C)   cigarette smoke
D)   pesticides
E)   all of these can lead to cancerF) A) and B)
G) C) and E)

Question 18

Eukaryotic transcription factors assist the ______ in binding to the _________.

Accepted Answer

A)   repressor; operator
B)   RNA polymerase; promoter
C)   DNA polymerase; promoter
D)   helicases; operator
E)   operator; repressorF) B) and D)
G) C) and D)

Question 19

Which of the following is NOT part of gene expression?

Accepted Answer

A)   transcription
B)   replication
C)   translation
D)   amino acids
E)   protein synthesisF) B) and E)
G) A) and B)

Question 20

The site of translation is the

Accepted Answer

A)   nucleus.
B)   nucleolus.
C)   ribosome.
D)   ribozyme.
E)   mitochondria.F) A) and D)
G) C) and D)

Exam 25: DNA Structure and Gene Expression

Which of the following does NOT occur when lactose is present in the environment of

Correct AnswerverifiedShow Answer

Which is the process by which a protein is constructed in the cytoplasm of eukaryotic cells?

Correct AnswerverifiedShow Answer

Identify the amino acids that would be assembled based upon the following codons: CGG AUA GAC GUA

Correct AnswerverifiedCGG would code for ArginineAU...View AnswerShow Answer

The function of transfer RNA is to

Correct AnswerverifiedShow Answer

Which statement is NOT correct about the results of the Hershey-Chase experiment with the T2 virus?

Correct AnswerverifiedShow Answer

In semi-conservative DNA replication,each new double helix formed will have

Correct AnswerverifiedShow Answer

If the protein coat of a virus that infects a bacterium is labeled with radioactive sulfur and the DNA of the virus is labeled with radioactive phosphorus,over time

Correct AnswerverifiedShow Answer

Segments of DNA that are NOT part of the gene are called

Correct AnswerverifiedShow Answer

Transcription of part of a DNA molecule with a nucleotide sequence of AAACAACTT results in a mRNA molecule with the complementary sequence of

Correct AnswerverifiedShow Answer

The site of translation is the

Correct AnswerverifiedShow Answer

Which factor is likely to lead to a change in the genetic control of the individual and possibly cancer?

Correct AnswerverifiedShow Answer

DNA segments called _____ are at the ends of chromosomes and eventually signal the cell to enter apoptosis.

Correct AnswerverifiedShow Answer

Eukaryotic transcription factors assist the ______ in binding to the _________.

Correct AnswerverifiedShow Answer

The correct sequence of events in the production of a polypeptide is

Correct AnswerverifiedShow Answer

Which of the following is NOT part of gene expression?

Correct AnswerverifiedShow Answer

Which of the classes of RNA molecules carries the genetic information as it is needed for the construction of a protein?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following nucleotide bases is found only in DNA,not in RNA?

Correct AnswerverifiedShow Answer

Messenger RNA is produced in the

Correct AnswerverifiedShow Answer

An intervening sequence of DNA that is not expressed is called a(n)

Correct AnswerverifiedShow Answer

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CGG would code for Arginine
AU...
View Answer

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Which statement is NOT correct about the results of the Hershey-Chase experiment with the T₂ virus?

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Eukaryotic transcription factors assist the in binding to the ___.

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