Question 1

What molecule connects the sugars in a strand of DNA?

Accepted Answer

A)  ribose
B)  phosphate
C)  deoxyriboseD) A) and B)
E) None of the above

Question 2

Transition and transverse substitutions are

Accepted Answer

A)  mutations only caused by chemicals such as benzene or radiation such as x-rays.
B)  purine-to-purine and pyrimidine-to-pyrimidine, respectively.
C)  purine-to-purine/pyrimidine-to-pyrimidine and purine-to-pyrimidine/pyrimidine-to-purine replacement, respectively.D) A) and C)
E) B) and C)

Question 3

The nitrogenous base thymine is what type of base?

Accepted Answer

A)  monoamine
B)  purine
C)  pyrimidineD) A) and B)
E) A) and C)

Question 4

The three types of RNA involved in gene expression are:

Accepted Answer

A)  mRNA, tRNA, and trRNA
B)  mRNA, xRNA, and tRNA
C)  mRNA, tRNA, and rRNAD) A) and B)
E) All of the above

Question 5

Which of the following is not a component of nucleotides, the building blocks of DNA?

Accepted Answer

A)  deoxyglucose
B)  inorganic phosphate
C)  nitrogenous baseD) A) and B)
E) A) and C)

Question 6

Which enzyme is responsible for putting together new DNA segments produced on the lagging strand during DNA replication?

Accepted Answer

A)  DNA ligase
B)  RNA primase
C)  DNA polymeraseD) B) and C)
E) A) and C)

Question 7

The process of producing RNA using a gene as a template is called:

Accepted Answer

A)  transcription
B)  translation
C)  transpositionD) None of the above
E) All of the above

Question 8

What enzyme is responsible for adding nucleotides to a growing DNA chain during replication?

Accepted Answer

A)  RNA polymerase
B)  RNA primase
C)  DNA polymeraseD) All of the above
E) A) and C)

Question 9

Which of the following accurately shows DNA base pairing and hydrogen bond number?

Accepted Answer

A)  Adenine-Thymine, 2 hydrogen bonds
B)  Adenine-Thymine, 3 hydrogen bonds
C)  Cytosine-Guanine, 2 hydrogen bondsD) A) and B)
E) All of the above

Question 10

The strand of DNA in the figure above that will be copied first as a series of fragments later joined together by DNA ligase is labeled how?

Accepted Answer

A)  The leading strand is labeled with 5'.
B)  The lagging strand is labeled with 3'.
C)  The lagging strand is labeled with 5'.D) A) and B)
E) B) and C)

Question 11

Which of the following accounts for most repair of mistakes made during DNA replication?

Accepted Answer

A)  proofreading by DNA polymerase
B)  proofreading by telomerase
C)  mismatch repairD) None of the above
E) All of the above

Question 12

Which of the following is found in eukaryotic genes but not prokaryotic genes?

Accepted Answer

A)  introns
B)  repressors
C)  operonsD) A) and B)
E) None of the above

Question 13

What does it mean when we say the genetic code is "degenerate?"

Accepted Answer

A)  a given amino acid can be coded or "called" by no more than one nucleotide codon triplet
B)  it behaves badly, and acts as a parasitic entity
C)  a given amino acid can be coded or "called" by more than one nucleotide codon tripletD) None of the above
E) B) and C) C

Question 14

In reference to the figure above depicting a DNA replication fork, which of the following is a true statement?

Accepted Answer

A)  The strand labeled "5'" is the template strand.
B)  The strand labeled "3'" is the lagging strand.
C)  The strand labeled "3'" is the leading strand.D) All of the above
E) B) and C) C

Question 15

The part of the gene where the DNA polymerase first binds during transcription is called the:

Accepted Answer

A)  promoter
B)  repressor
C)  operonD) A) and B)
E) B) and C)

Question 16

The flow of molecular information from genes to RNA to proteins is referred to as what?

Accepted Answer

A)  the Central Limit Theorem
B)  the Central Dogma
C)  the Peripheral DoctrineD) None of the above
E) All of the above

Question 17

What is a possible function of introns in eukaryotic DNA?

Accepted Answer

A)  to act as the coding part of the gene
B)  to break up the gene
C)  to increase recombination of gene segments by crossing overD) All of the above
E) A) and C)

Question 18

What type of bond keeps each individual DNA strand together?

Accepted Answer

A)  covalent bonds
B)  ionic bonds
C)  hydrogen bondsD) None of the above
E) A) and B)

Question 19

Explain how homologues chromosomes can prevent disease.(Outcome #3)

Accepted Answer

A)  One homologue can replace the other homologue
B)  One homologue can mask the presence of a disease-causing homologue
C)  Having two versions of a gene always prevents diseaseD) All of the above
E) B) and C) B

Question 20

Gene expression refers to what process?

Accepted Answer

A)  the process of transcribing DNA into RNA and translating RNA into protein
B)  the process of transcribing RNA into DNA and translating DNA into protein
C)  the process of transcribing DNA into RNA and translating RNA into chromatinD) B) and C)
E) A) and C)

Exam 9: Molecular Biology

What molecule connects the sugars in a strand of DNA?

Correct AnswerverifiedShow Answer

Transition and transverse substitutions are

Correct AnswerverifiedShow Answer

The nitrogenous base thymine is what type of base?

Correct AnswerverifiedShow Answer

The three types of RNA involved in gene expression are:

Correct AnswerverifiedShow Answer

Which of the following is not a component of nucleotides, the building blocks of DNA?

Correct AnswerverifiedShow Answer

Which enzyme is responsible for putting together new DNA segments produced on the lagging strand during DNA replication?

Correct AnswerverifiedShow Answer

The process of producing RNA using a gene as a template is called:

Correct AnswerverifiedShow Answer

What enzyme is responsible for adding nucleotides to a growing DNA chain during replication?

Correct AnswerverifiedShow Answer

Which of the following accurately shows DNA base pairing and hydrogen bond number?

Correct AnswerverifiedShow Answer

The strand of DNA in the figure above that will be copied first as a series of fragments later joined together by DNA ligase is labeled how?

Correct AnswerverifiedShow Answer

Which of the following accounts for most repair of mistakes made during DNA replication?

Correct AnswerverifiedShow Answer

Which of the following is found in eukaryotic genes but not prokaryotic genes?

Correct AnswerverifiedShow Answer

What does it mean when we say the genetic code is "degenerate?"

Correct AnswerverifiedC

In reference to the figure above depicting a DNA replication fork, which of the following is a true statement?

Correct AnswerverifiedC

The part of the gene where the DNA polymerase first binds during transcription is called the:

Correct AnswerverifiedShow Answer

The flow of molecular information from genes to RNA to proteins is referred to as what?

Correct AnswerverifiedShow Answer

What is a possible function of introns in eukaryotic DNA?

Correct AnswerverifiedShow Answer

What type of bond keeps each individual DNA strand together?

Correct AnswerverifiedShow Answer

Explain how homologues chromosomes can prevent disease.(Outcome #3)

Correct AnswerverifiedB

Gene expression refers to what process?

Correct AnswerverifiedShow Answer

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C

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C

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B

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