LS23L Final Exam Questions and Answers
with Verified Solutions | Latest Updated 2026
What should the best hit on a
BLAST have?
Select one:
a. a high score and a low E
value
b. a high score
c. a low score and a low E
value
d. a high score and a high E
value
e. a low score and a high E
value
,In the mitochondrial DNA e
sequence lab, which
geographic region did
scientists trace the earliest
human populations to and
how did they determine this?
Select one:
a. Europe by the maternal
heritage of mitochondrial
DNA
b. Africa by the paternal
heritage of mitochondrial
DNA
c. Europe by the paternal
heritage of mitochondrial
DNA
d. Asia by the maternal
heritage of mitochondrial
DNA
e. Africa by the maternal
heritage of mitochondrial
DNA
,Which of the following e
correctly describes a
difference between DNA
sequencing and PCR:
Select one:
a. DNA sequencing is in vitro
DNA synthesis, while PCR is in
vivo DNA synthesis.
b. DNA sequencing is anabolic
(synthesizing) process, while
PCR is a catabolic (breaking
down) process
c. DNA sequencing does not
involve the use of primer,
while PCR does.
d. DNA sequencing requires
DNA polymerase, while PCR
requires RNA polymerase.
e. DNA synthesis is terminated
in DNA sequencing by the
addition of ddNTPs, while
each newly synthesized PCR
strand is terminated at the end
of the template strand.
What is the name of the the a
output image of the
sequencing process?
Select one:
a. electropherogram
b. none of these
c. electrospectrogram
d. electrochemogram
e. electroradiogram
, What is the ratio of ddNTP to d
dNTP in the nucleotide
mixture for the sequencing
reaction?
Select one:
a. All ddNTP
b. 1 dNTP to 50 ddNTP
c. 1 ddNTP to 10 dNTP
d. 1 ddNTP to 50 dNTP
e. All dNTP
How long ago did our human a
haplogroups diverge?
Select one:
a. Tens of thousands of years
ago
b. Decades ago
c. A thousand years ago
d. A million years ago
e. Hundreds of years ago
What is the ratio of ddNTP to b
dNTP in the nucleotide
mixture for the sequencing
reaction?
Select one:
a. All ddNTP
b. 1 ddNTP to 50 dNTP
c. 1 ddNTP to 10 dNTP
d. All dNTP
e. 1 dNTP to 50 ddNTP
with Verified Solutions | Latest Updated 2026
What should the best hit on a
BLAST have?
Select one:
a. a high score and a low E
value
b. a high score
c. a low score and a low E
value
d. a high score and a high E
value
e. a low score and a high E
value
,In the mitochondrial DNA e
sequence lab, which
geographic region did
scientists trace the earliest
human populations to and
how did they determine this?
Select one:
a. Europe by the maternal
heritage of mitochondrial
DNA
b. Africa by the paternal
heritage of mitochondrial
DNA
c. Europe by the paternal
heritage of mitochondrial
DNA
d. Asia by the maternal
heritage of mitochondrial
DNA
e. Africa by the maternal
heritage of mitochondrial
DNA
,Which of the following e
correctly describes a
difference between DNA
sequencing and PCR:
Select one:
a. DNA sequencing is in vitro
DNA synthesis, while PCR is in
vivo DNA synthesis.
b. DNA sequencing is anabolic
(synthesizing) process, while
PCR is a catabolic (breaking
down) process
c. DNA sequencing does not
involve the use of primer,
while PCR does.
d. DNA sequencing requires
DNA polymerase, while PCR
requires RNA polymerase.
e. DNA synthesis is terminated
in DNA sequencing by the
addition of ddNTPs, while
each newly synthesized PCR
strand is terminated at the end
of the template strand.
What is the name of the the a
output image of the
sequencing process?
Select one:
a. electropherogram
b. none of these
c. electrospectrogram
d. electrochemogram
e. electroradiogram
, What is the ratio of ddNTP to d
dNTP in the nucleotide
mixture for the sequencing
reaction?
Select one:
a. All ddNTP
b. 1 dNTP to 50 ddNTP
c. 1 ddNTP to 10 dNTP
d. 1 ddNTP to 50 dNTP
e. All dNTP
How long ago did our human a
haplogroups diverge?
Select one:
a. Tens of thousands of years
ago
b. Decades ago
c. A thousand years ago
d. A million years ago
e. Hundreds of years ago
What is the ratio of ddNTP to b
dNTP in the nucleotide
mixture for the sequencing
reaction?
Select one:
a. All ddNTP
b. 1 ddNTP to 50 dNTP
c. 1 ddNTP to 10 dNTP
d. All dNTP
e. 1 dNTP to 50 ddNTP
