Question 1

Because one original strand of the double-stranded helix is found in each daughter cell,the replication process is called

Accepted Answer

A)   proofreading.
B)   semi-conservative.
C)   redundant.
D)   freeing of DNA.
E)   mutation positive.F) B) and D)
G) A) and E)

Question 2

____________ regulation occurs within a cell when the newly formed protein is modified.

Accepted Answer

A)   Transcriptional
B)   Posttranscriptional
C)   Translational
D)   Posttranslational
E)   OperonF) B) and C)
G) A) and E)

Question 3

According to the operon theory,the function of the regulator gene is to

Accepted Answer

A)   code for enzymes in a metabolic pathway.
B)   serve as an on/off switch for transcription.
C)   code for a repressor molecule that can bind to the operator.
D)   bind to the RNA polymerase molecule.
E)   bind to the promoter.F) A) and E)
G) A) and C)

Question 4

Which of the following will not assist you in protecting yourself from cancer?

Accepted Answer

A)   use of alcohol
B)   eating vitamin rich foods
C)   reducing the amount of salt-cured and nitrate-cured foods
D)   reducing your weight
E)   regular exerciseF) A) and B)
G) A) and E)

Question 5

-In Figure 25.4,if adenine is located on strand 4,then on strand 2 at the same location ____ must be present.

Accepted Answer

A)   adenine
B)   thymine
C)   cytosine
D)   guanine
E)   uracilF) A) and B)
G) A) and C)

Question 6

If the normal nucleotide sequence was TACGGCATG,what type of gene mutation is present if the resulting sequence becomes TAGGCATG?

Accepted Answer

A)   chromosomal mutation
B)   germinal mutation
C)   addition mutation
D)   deletion mutation
E)   substitution mutationF) B) and C)
G) A) and B)

Question 7

Which of the following levels of control involves the use of a poly-A tail?

Accepted Answer

A)   protein activity
B)   translation of mRNA
C)   mRNA processing
D)   transcriptional control
E)   chromatin structureF) A) and B)
G) A) and C)

Question 8

Which of the classes of RNA molecules carries the amino acids that are added to the growing polypeptide chain?

Accepted Answer

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

Question 9

A nucleotide contains

Accepted Answer

A)   DNA and RNA.
B)   a sugar and a phosphate.
C)   complementary purines and pyrimidines.
D)   RNA, protein, and lipids.
E)   a sugar, a phosphate, and a nitrogen base.F) All of the above
G) B) and D)

Question 10

A gene is physically located on the _____ of the cell.

Accepted Answer

A)   DNA
B)   messenger RNA
C)   enzymes
D)   proteins
E)   nucleusF) B) and E)
G) A) and E)

Question 11

Which level of primary control in eukaryotic gene activity involves the lifespan of the mRNA molecule and the ability of the mRNA to bind to ribosomes?

Accepted Answer

A)   feedback control
B)   translational control
C)   transcriptional control
D)   posttranscriptional control
E)   posttranslational controlF) B) and E)
G) D) and E) B

Question 12

If a species contains 23% A in its DNA,what is the percentage of guanine it would contain?

Accepted Answer

A)  23%
B)  46%
C)  25%
D)  44%
E)  27%F) B) and E)
G) All of the above

Question 13

Specific DNA sequences that have the ability to move within and out of chromosomes are called

Accepted Answer

A)   transposons.
B)   introns.
C)   exons.
D)   operators.
E)   ribozymes.F) A) and C)
G) A) and B) A

Question 14

Apoptosis refers to cell death and

Accepted Answer

A)   is always biologically detrimental to an organism.
B)   can be programmed and is essential to normal development.
C)   is the accumulation of genetic errors.
D)   is a failure in the translation or transcription mechanism.
E)   is any failure of the genetic machinery to work correctly.F) A) and B)
G) C) and D)

Question 15

Information from X-ray crystallographic data collected by _______ was used by Watson and Crick in their development of the model of DNA.

Accepted Answer

A)   Chargaff
B)   Griffith
C)   McClintock
D)   Franklin
E)   Hershey and ChaseF) A) and E)
G) A) and C)

Question 16

Artificial RNA with a known base sequence was added to a medium containing bacterial ribosomes and a mixture of amino acids.By chemical identification of the resulting polypeptide,researchers could discover the

Accepted Answer

A)   transcription factors involved.
B)   mutation rate.
C)   codon.
D)   Chargaff rule.
E)   difference between DNA and RNA.F) B) and E)
G) A) and B)

Question 17

Which part of an operon is incorrectly matched with its function?

Accepted Answer

A)   promoter-where RNA polymerase first binds to DNA
B)   regulator-binds to the repressor protein
C)   structural-makes mRNA by transcription
D)   operator-if unbound, allows RNA polymerase to bind to DNA
E)   all are incorrectly matched with its functionF) A) and B)
G) None of the above

Question 18

During the process of transcription,the information in

Accepted Answer

A)   a protein is converted into RNA information.
B)   RNA is converted into protein information.
C)   RNA is converted into DNA information.
D)   DNA is converted into RNA information.
E)   DNA is converted into protein information.F) C) and D)
G) B) and C)

Question 19

A cluster of prokaryotic genes under the control of one regulatory sequence is called a(n)

Accepted Answer

A)   repressor.
B)   promoter.
C)   operon.
D)   operator.
E)   regulator gene.F) B) and E)
G) C) and D)

Question 20

The ____ of a tRNA molecule will base pair with the codon of a mRNA molecule.

Accepted Answer

A)   DNA sequence
B)   anticodon
C)   amino acid binding site
D)   RNA polymerase
E)   promoter siteF) A) and D)
G) A) and E)

Exam 25: DNA Structure and Gene Expression

Because one original strand of the double-stranded helix is found in each daughter cell,the replication process is called

Correct AnswerverifiedShow Answer

____________ regulation occurs within a cell when the newly formed protein is modified.

Correct AnswerverifiedShow Answer

According to the operon theory,the function of the regulator gene is to

Correct AnswerverifiedShow Answer

Which of the following will not assist you in protecting yourself from cancer?

Correct AnswerverifiedShow Answer

-In Figure 25.4,if adenine is located on strand 4,then on strand 2 at the same location ____ must be present.

Correct AnswerverifiedShow Answer

If the normal nucleotide sequence was TACGGCATG,what type of gene mutation is present if the resulting sequence becomes TAGGCATG?

Correct AnswerverifiedShow Answer

Which of the following levels of control involves the use of a poly-A tail?

Correct AnswerverifiedShow Answer

Which of the classes of RNA molecules carries the amino acids that are added to the growing polypeptide chain?

Correct AnswerverifiedB

A nucleotide contains

Correct AnswerverifiedShow Answer

A gene is physically located on the _____ of the cell.

Correct AnswerverifiedShow Answer

Which level of primary control in eukaryotic gene activity involves the lifespan of the mRNA molecule and the ability of the mRNA to bind to ribosomes?

Correct AnswerverifiedB

If a species contains 23% A in its DNA,what is the percentage of guanine it would contain?

Correct AnswerverifiedShow Answer

Specific DNA sequences that have the ability to move within and out of chromosomes are called

Correct AnswerverifiedA

Apoptosis refers to cell death and

Correct AnswerverifiedShow Answer

Information from X-ray crystallographic data collected by _______ was used by Watson and Crick in their development of the model of DNA.

Correct AnswerverifiedShow Answer

Artificial RNA with a known base sequence was added to a medium containing bacterial ribosomes and a mixture of amino acids.By chemical identification of the resulting polypeptide,researchers could discover the

Correct AnswerverifiedShow Answer

Which part of an operon is incorrectly matched with its function?

Correct AnswerverifiedShow Answer

During the process of transcription,the information in

Correct AnswerverifiedShow Answer

A cluster of prokaryotic genes under the control of one regulatory sequence is called a(n)

Correct AnswerverifiedShow Answer

The ____ of a tRNA molecule will base pair with the codon of a mRNA molecule.

Correct AnswerverifiedShow Answer

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