Intro to Molecular Cell Biology Test Bank Chapter 6 Exam Questions and
Answers (Verified Answers) ||ACTUAL EXAM TEST!! Graded A+ |
2025|2026 EXAM UPDATE
The process of DNA replication requires that each of the parental DNA strands be used as a
____________ to produce a duplicate of the opposing strand.
(a) catalyst
(b) competitor
(c) template
(d) copy - (answer)(c) template
DNA replication is considered semiconservative because __________________________________.
(a) after many rounds of DNA replication, the original DNA double helix is still intact.
(b) each daughter DNA molecule consists of two new strands copied form the parent
(c) each daughter DNA molecule consists of one strand from the parent DNA molecule and one new
strand. - (answer)(c) each daughter DNA molecule consists of one strand from the parent DNA molecule
and one new strand
The classic experiment conducted by Meselson and Stahl demonstrated that DNA replication is
accomplished by employing a ______________ mechanism. - (answer)semiconservative
Initiator proteins bind to replication origins and disrupt hydrogen bonds between the two DNA strands
being copied. Which of the factors below does not contribute to the relative ease of strand separation
by initiator proteins?
(a) replication origins are rich in A-T base pairs
(b) the reaction can occur at room temperature
(c) they only separate a few base pairs at a time
(d) once opened, other portions of the DNA replication machinery bind to the origin - (answer)(b) the
reaction can occur at room temperature
, Intro to Molecular Cell Biology Test Bank Chapter 6 Exam Questions and
Answers (Verified Answers) ||ACTUAL EXAM TEST!! Graded A+ |
2025|2026 EXAM UPDATE
If the genome of the bacterium E. coli requires about 20 minutes to replicate itself, how can the genome
of a fruit fly be replicated in only 3 minutes?
(a) The fruit fly genome is smaller than E coli
(b) Eukaryotic DNA polymerase synthesizes DNA at a much faster rate than prokaryotic
(c) The nuclear membrane keeps the fruit fly DNA concentrated in one place in the cell, which increases
the rate of polymerization
(d) Fruit fly DNA contains more origins of replication than E coli DNA. - (answer)(d) Fruit fly DNA contains
more origins of replication than E coli DNA
True or false?
When DNA is being replicated inside a cell, local heating occurs, allowing the two strands to separate. -
(answer)False. This is accomplished by initiated proteins binding at the origin of replication.
True or false?
DNA replication origins are typically rich in G-C base pairs. - (answer)They are rich in A-T base pairs
which makes it easier for them to separate the strands because they are only held together by two
hydrogen bonds
True or false?
Meselson and Stahl ruled out the dispersive model for DNA replication. - (answer)true
True or false?
DNA replication is a bidirectional process that is initiated at multiple locations among chromosomes in
eukaryotic cells. - (answer)True
How many replication forks are formed when an origin of replication is opened? - (answer)2
Answers (Verified Answers) ||ACTUAL EXAM TEST!! Graded A+ |
2025|2026 EXAM UPDATE
The process of DNA replication requires that each of the parental DNA strands be used as a
____________ to produce a duplicate of the opposing strand.
(a) catalyst
(b) competitor
(c) template
(d) copy - (answer)(c) template
DNA replication is considered semiconservative because __________________________________.
(a) after many rounds of DNA replication, the original DNA double helix is still intact.
(b) each daughter DNA molecule consists of two new strands copied form the parent
(c) each daughter DNA molecule consists of one strand from the parent DNA molecule and one new
strand. - (answer)(c) each daughter DNA molecule consists of one strand from the parent DNA molecule
and one new strand
The classic experiment conducted by Meselson and Stahl demonstrated that DNA replication is
accomplished by employing a ______________ mechanism. - (answer)semiconservative
Initiator proteins bind to replication origins and disrupt hydrogen bonds between the two DNA strands
being copied. Which of the factors below does not contribute to the relative ease of strand separation
by initiator proteins?
(a) replication origins are rich in A-T base pairs
(b) the reaction can occur at room temperature
(c) they only separate a few base pairs at a time
(d) once opened, other portions of the DNA replication machinery bind to the origin - (answer)(b) the
reaction can occur at room temperature
, Intro to Molecular Cell Biology Test Bank Chapter 6 Exam Questions and
Answers (Verified Answers) ||ACTUAL EXAM TEST!! Graded A+ |
2025|2026 EXAM UPDATE
If the genome of the bacterium E. coli requires about 20 minutes to replicate itself, how can the genome
of a fruit fly be replicated in only 3 minutes?
(a) The fruit fly genome is smaller than E coli
(b) Eukaryotic DNA polymerase synthesizes DNA at a much faster rate than prokaryotic
(c) The nuclear membrane keeps the fruit fly DNA concentrated in one place in the cell, which increases
the rate of polymerization
(d) Fruit fly DNA contains more origins of replication than E coli DNA. - (answer)(d) Fruit fly DNA contains
more origins of replication than E coli DNA
True or false?
When DNA is being replicated inside a cell, local heating occurs, allowing the two strands to separate. -
(answer)False. This is accomplished by initiated proteins binding at the origin of replication.
True or false?
DNA replication origins are typically rich in G-C base pairs. - (answer)They are rich in A-T base pairs
which makes it easier for them to separate the strands because they are only held together by two
hydrogen bonds
True or false?
Meselson and Stahl ruled out the dispersive model for DNA replication. - (answer)true
True or false?
DNA replication is a bidirectional process that is initiated at multiple locations among chromosomes in
eukaryotic cells. - (answer)True
How many replication forks are formed when an origin of replication is opened? - (answer)2
