1|Page
Bio 181 Grand Canyon University Exam 3 ||Verified
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What is the role of DNA ligase in the elongation of the
lagging strand during DNA replication?
A) It synthesizes RNA nucleotides to make a primer.
B) It catalyzes the lengthening of telomeres.
C) It joins Okazaki fragments together.
D) It unwinds the parental double helix.
E) It stabilizes the unwound parental DNA. - Answer-c) It
joins Okazaki fragments together
What is the function of DNA polymerase III?
A) to unwind the DNA helix during replication
B) to seal together the broken ends of DNA strands
C) to add nucleotides to the 3' end of a growing DNA
strand
D) to degrade damaged DNA molecules
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E) to rejoin the two DNA strands (one new and one old)
after replication - Answer-c) to add nucleotides to the 3'
end of a growing DNA strand
A new DNA strand elongates only in the 5' to 3' direction
because
A) DNA polymerase begins adding nucleotides at the 5'
end of the template.
B) Okazaki fragments prevent elongation in the 3' to 5'
direction.
C) the polarity of the DNA molecule prevents addition of
nucleotides at the 3' end.
D) replication must progress toward the replication fork.
E) DNA polymerase can only add nucleotides to the free 3'
end. - Answer-e) DNA polymerase can only add
nucleotides to the free 3' end.
Which of the following statements is true of linkage? -
Answer-The closer two genes are on a chromosome, the
lower the probability that a crossover will occur between
them.
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Between which two genes in Figure 15.1 would you expect
the highest frequency of recombination? - Answer-A and G
SRY is best described in which of the following ways? -
Answer-A gene region present on the Y chromosome that
triggers male development.
One possible result of chromosomal breakage is for a
fragment to join a nonhomologous chromosome. What is
this alteration called?
(what moves a segment from one chromosome to
another?) - Answer-Translocation
Red-green color blindness is a sex-linked recessive trait in
humans. Two people with normal color vision have a color-
blind son. What are the genotypes of the parents? -
Answer-XRXr and XRY
The reason that linked genes are inherited together? -
Answer-They are located close together on the same
chromosome
Bio 181 Grand Canyon University Exam 3 ||Verified
Exam!!!|| Most Recent Exam Actual Complete Real
Exam Questions And Correct Answers (Verified
Answers) Already Graded A+ | Guaranteed Success!! |
Newest Exam!!!
What is the role of DNA ligase in the elongation of the
lagging strand during DNA replication?
A) It synthesizes RNA nucleotides to make a primer.
B) It catalyzes the lengthening of telomeres.
C) It joins Okazaki fragments together.
D) It unwinds the parental double helix.
E) It stabilizes the unwound parental DNA. - Answer-c) It
joins Okazaki fragments together
What is the function of DNA polymerase III?
A) to unwind the DNA helix during replication
B) to seal together the broken ends of DNA strands
C) to add nucleotides to the 3' end of a growing DNA
strand
D) to degrade damaged DNA molecules
,2|Page
E) to rejoin the two DNA strands (one new and one old)
after replication - Answer-c) to add nucleotides to the 3'
end of a growing DNA strand
A new DNA strand elongates only in the 5' to 3' direction
because
A) DNA polymerase begins adding nucleotides at the 5'
end of the template.
B) Okazaki fragments prevent elongation in the 3' to 5'
direction.
C) the polarity of the DNA molecule prevents addition of
nucleotides at the 3' end.
D) replication must progress toward the replication fork.
E) DNA polymerase can only add nucleotides to the free 3'
end. - Answer-e) DNA polymerase can only add
nucleotides to the free 3' end.
Which of the following statements is true of linkage? -
Answer-The closer two genes are on a chromosome, the
lower the probability that a crossover will occur between
them.
, 3|Page
Between which two genes in Figure 15.1 would you expect
the highest frequency of recombination? - Answer-A and G
SRY is best described in which of the following ways? -
Answer-A gene region present on the Y chromosome that
triggers male development.
One possible result of chromosomal breakage is for a
fragment to join a nonhomologous chromosome. What is
this alteration called?
(what moves a segment from one chromosome to
another?) - Answer-Translocation
Red-green color blindness is a sex-linked recessive trait in
humans. Two people with normal color vision have a color-
blind son. What are the genotypes of the parents? -
Answer-XRXr and XRY
The reason that linked genes are inherited together? -
Answer-They are located close together on the same
chromosome
