AAMC FL 2 B/B |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
The information in the passage suggests that in mice CRY1 most likely affects XPA by:
A.
activating XPA protein activity.
B.
activating translation of XPA-encoding transcripts.
C.
repressing replication of the XPA-encoding gene.
D.
repressing transcription of the XPA-encoding gene.
CORRECT ANSWER
The answer is D because of the graph which shows a inverse relationship. But also,
whenever talking about expression always think something with the transcription is gonna
be affected
Question 2
Which cells harvested from adult mice were most likely used as the highly proliferative
benchmark in the experiment that generated the data shown in Figure 3?
A.
Adipocytes
B.
Cardiac muscle cells
C.
1
,Gastrointestinal epithelial cells
D.
Neurons
CORRECT ANSWER
The answer is C. The gastrointestinal cells are always going to be exhibiting mitosis because
of the low pH they need to be proliferative = reproduce. Therefore they have the highest
proliferative benchmark
Question 3
After a section of a DNA strand containing a UVR-induced lesion is removed and
resynthesized, the newly synthesized strand is rejoined to the remainder of the DNA
strand by what type of bond?
A.
Disulfide
B.
Hydrogen
C.
Peptide
D.
Phosphodiester
CORRECT ANSWER
The answer is D because the backbone of DNA is held together by phosphodiester bonds
sugar to base connection
Question 4
Which image shows an example of a cyclobutane pyrimidine dimer?
CORRECT ANSWER
2
,The answer is C because this shows a dimer formed by covalent bonding of two pyurimidine
molecules
Question 5
AlP exposed to an aqueous solution in which pH range will result in the largest amount of
phosphine production?
A.
pH < 4
B.
4 < pH < 7
C.
7 < pH < 10
D.
pH > 10
CORRECT ANSWER
The reaction shows that there are H+ ions in there which would indicate a relatively low pH
therefore the answer is A
Question 6
Based on the passage, which amino acid will most likely react with phosphine?
A.
Met
B.
Cys
C.
Ser
3
, D.
Thr
CORRECT ANSWER
In the passage it states the phosphine reacts with sulfhydryl groups. therefore cysteine
would be your answer
Question 7
When researchers determined the total cellular concentration of ATP in AlP-exposed rat
liver cells, they found the concentration to be equal to the control value. Which conclusion
about the metabolic state of the cell is best supported by these data?
A.
Glycolytic flux is increased after AlP treatment.
B.
Glycolytic flux is decreased after AlP treatment.
C.
Citric acid cycle flux is increased after AlP treatment.
D.
Citric acid cycle flux is decreased after AlP treatment.
CORRECT ANSWER
To compensate we need an increase in production. And the citric acid cycle works in
relation with the ETC. AIP is said to decrease ETC function therefore the CAC as well.
THerefore we need more glycolytic flux as stated in A.
Question 8
Why was it necessary for the researchers to determine the activity of the complexes
independent of one another?
A.
4
VERIFIED ANSWERS|BRAND NEW 2026-2027
UPDATE|GRADED A+
Question 1
The information in the passage suggests that in mice CRY1 most likely affects XPA by:
A.
activating XPA protein activity.
B.
activating translation of XPA-encoding transcripts.
C.
repressing replication of the XPA-encoding gene.
D.
repressing transcription of the XPA-encoding gene.
CORRECT ANSWER
The answer is D because of the graph which shows a inverse relationship. But also,
whenever talking about expression always think something with the transcription is gonna
be affected
Question 2
Which cells harvested from adult mice were most likely used as the highly proliferative
benchmark in the experiment that generated the data shown in Figure 3?
A.
Adipocytes
B.
Cardiac muscle cells
C.
1
,Gastrointestinal epithelial cells
D.
Neurons
CORRECT ANSWER
The answer is C. The gastrointestinal cells are always going to be exhibiting mitosis because
of the low pH they need to be proliferative = reproduce. Therefore they have the highest
proliferative benchmark
Question 3
After a section of a DNA strand containing a UVR-induced lesion is removed and
resynthesized, the newly synthesized strand is rejoined to the remainder of the DNA
strand by what type of bond?
A.
Disulfide
B.
Hydrogen
C.
Peptide
D.
Phosphodiester
CORRECT ANSWER
The answer is D because the backbone of DNA is held together by phosphodiester bonds
sugar to base connection
Question 4
Which image shows an example of a cyclobutane pyrimidine dimer?
CORRECT ANSWER
2
,The answer is C because this shows a dimer formed by covalent bonding of two pyurimidine
molecules
Question 5
AlP exposed to an aqueous solution in which pH range will result in the largest amount of
phosphine production?
A.
pH < 4
B.
4 < pH < 7
C.
7 < pH < 10
D.
pH > 10
CORRECT ANSWER
The reaction shows that there are H+ ions in there which would indicate a relatively low pH
therefore the answer is A
Question 6
Based on the passage, which amino acid will most likely react with phosphine?
A.
Met
B.
Cys
C.
Ser
3
, D.
Thr
CORRECT ANSWER
In the passage it states the phosphine reacts with sulfhydryl groups. therefore cysteine
would be your answer
Question 7
When researchers determined the total cellular concentration of ATP in AlP-exposed rat
liver cells, they found the concentration to be equal to the control value. Which conclusion
about the metabolic state of the cell is best supported by these data?
A.
Glycolytic flux is increased after AlP treatment.
B.
Glycolytic flux is decreased after AlP treatment.
C.
Citric acid cycle flux is increased after AlP treatment.
D.
Citric acid cycle flux is decreased after AlP treatment.
CORRECT ANSWER
To compensate we need an increase in production. And the citric acid cycle works in
relation with the ETC. AIP is said to decrease ETC function therefore the CAC as well.
THerefore we need more glycolytic flux as stated in A.
Question 8
Why was it necessary for the researchers to determine the activity of the complexes
independent of one another?
A.
4
