BIO 207 EXAM 2 WITH 100%
CORRECT ANSWERS 2026
The following figure diagrams three pathways for the catabolism
of glucose. Pathway ________ is most likely to be used for
biosynthesis because it can be used to ________. correct answer
pentose phosphate; make carbon backbones of many lengths
To begin the Krebs cycle, pyruvate must be converted into...
correct answer Acetyl-CoA
Which of the following pairs is mismatched? correct answer
glyoxylate bypass—2 NADH, 1 FADH2
The enzyme pyruvate kinase catalyzes the conversion of
phosphoenolpyruvate to pyruvate; the phosphate group is
transferred to ADP to form ATP. This reaction is an example of
correct answer ATP synthesis by substrate-level
phosphorylation.
Which of the following is NOT a substrate for catabolism? correct
answer nitrogen gas
Suppose a cell is fed C14 radiolabeled acetyl-CoA for 1 hour,
followed by unlabeled acetyl-CoA for 1 hour. Assuming the Krebs
cycle proceeds without use of the glyoxylate bypass, how would
we expect radioactivity of the cell to change throughout the
experiment? correct answer Radioactivity of the cell would
,increase during the first hour due to accumulation in Krebs cycle
intermediates, then return to normal as the C14 is released as
carbon dioxide
In the pentose phosphate shunt, glucose 6-phosphate is oxidized
to 6-phosphogluconate, which is then decarboxylated to ribulose
5-phosphate. What is the main metabolic role of this pathway?
correct answer production of carbohydrates to be utilized in
biosynthesis
A reaction in which a compound with a small reduction potential
donates electrons (reduces) a compound with a large reduction
potential is usually... correct answer Favorable, with a negative
ΔG value
The energy yield from fermentation is lower than from respiration
because correct answer respiration completely oxidizes
glucose to CO2, resulting in greater generation of NADH and thus
ATP.
When double-stranded DNA replicates, the newly made strand is
related to its template strand in that the two strands have
correct answer complementary sequences and are antiparallel
to each other.
Besides the DNA residing in the nucleoid, two other kinds of DNA
molecules that may be present in the cytoplasm of a bacterial cell
are ________ and the genomes of ________. correct answer
plasmids; bacteriophages
, The sliding clamp is used to tether the DNA polymerase to the
chromosome and is loaded by correct answer clamp-loading
complex
DNA replication is semi-conservative because correct answer
one strand in each daughter cell in newly synthesized
Which of the following is true of the DNA double helix? correct
answer RNA polymerase can use DNA as a template
During replication, the lagging strand is synthesized ________,
while the leading strand can be synthesized ________. correct
answer discontinuously; continuously
What region of the chromosome in E. coli is involved in the
replication termination process? correct answer ter
________ bind RNA transcripts and help or hinder degradation.
correct answer sRNA
With respect to quorum sensing, all of the following are true
EXCEPT that it correct answer has only one autoinduction
system per species.
________ prevent transcription, whereas ________ stimulate
transcription. correct answer
ou've identified a new species of bacteria in a geothermal vent
community. The vent is unique in that its temperature oscillates
CORRECT ANSWERS 2026
The following figure diagrams three pathways for the catabolism
of glucose. Pathway ________ is most likely to be used for
biosynthesis because it can be used to ________. correct answer
pentose phosphate; make carbon backbones of many lengths
To begin the Krebs cycle, pyruvate must be converted into...
correct answer Acetyl-CoA
Which of the following pairs is mismatched? correct answer
glyoxylate bypass—2 NADH, 1 FADH2
The enzyme pyruvate kinase catalyzes the conversion of
phosphoenolpyruvate to pyruvate; the phosphate group is
transferred to ADP to form ATP. This reaction is an example of
correct answer ATP synthesis by substrate-level
phosphorylation.
Which of the following is NOT a substrate for catabolism? correct
answer nitrogen gas
Suppose a cell is fed C14 radiolabeled acetyl-CoA for 1 hour,
followed by unlabeled acetyl-CoA for 1 hour. Assuming the Krebs
cycle proceeds without use of the glyoxylate bypass, how would
we expect radioactivity of the cell to change throughout the
experiment? correct answer Radioactivity of the cell would
,increase during the first hour due to accumulation in Krebs cycle
intermediates, then return to normal as the C14 is released as
carbon dioxide
In the pentose phosphate shunt, glucose 6-phosphate is oxidized
to 6-phosphogluconate, which is then decarboxylated to ribulose
5-phosphate. What is the main metabolic role of this pathway?
correct answer production of carbohydrates to be utilized in
biosynthesis
A reaction in which a compound with a small reduction potential
donates electrons (reduces) a compound with a large reduction
potential is usually... correct answer Favorable, with a negative
ΔG value
The energy yield from fermentation is lower than from respiration
because correct answer respiration completely oxidizes
glucose to CO2, resulting in greater generation of NADH and thus
ATP.
When double-stranded DNA replicates, the newly made strand is
related to its template strand in that the two strands have
correct answer complementary sequences and are antiparallel
to each other.
Besides the DNA residing in the nucleoid, two other kinds of DNA
molecules that may be present in the cytoplasm of a bacterial cell
are ________ and the genomes of ________. correct answer
plasmids; bacteriophages
, The sliding clamp is used to tether the DNA polymerase to the
chromosome and is loaded by correct answer clamp-loading
complex
DNA replication is semi-conservative because correct answer
one strand in each daughter cell in newly synthesized
Which of the following is true of the DNA double helix? correct
answer RNA polymerase can use DNA as a template
During replication, the lagging strand is synthesized ________,
while the leading strand can be synthesized ________. correct
answer discontinuously; continuously
What region of the chromosome in E. coli is involved in the
replication termination process? correct answer ter
________ bind RNA transcripts and help or hinder degradation.
correct answer sRNA
With respect to quorum sensing, all of the following are true
EXCEPT that it correct answer has only one autoinduction
system per species.
________ prevent transcription, whereas ________ stimulate
transcription. correct answer
ou've identified a new species of bacteria in a geothermal vent
community. The vent is unique in that its temperature oscillates
