BIOD 171 Final Exam – 150+ Actual Exam Questions &
100% Correct Answers | Latest Update 2026 | Biology
Exam Prep
1. In a dilution streak method, which plate typically contains the highest
concentration of bacteria?
P2
P4
P1
P3
2. Fatty acids are catabolized in
The pentose phosphate pathway
The Entner Doudoroff pathway
Glycolysis
beta-oxidation followed by the Krebs cycle
The electron transport chain
3. Describe the role of LPS in the structure of Gram-Negative bacteria and its
significance.
LPS is a type of protein that aids in cell division.
LPS is a carbohydrate that stores genetic information.
LPS contributes to the structural integrity of the outer membrane
and can trigger immune responses.
LPS is involved in energy production within the cell.
,4. If a new organism is discovered that is unicellular, eukaryotic, and capable of
photosynthesis, which kingdom would it most likely belong to?
Protista
Animalia
Bacteria
Fungi
5. Explain the primary difference in how the Salk and Sabin vaccines work to
protect against polio.
The Salk vaccine is administered orally, while the Sabin vaccine is
injected.
The Salk vaccine uses inactivated virus to stimulate an immune
response, while the Sabin vaccine uses live attenuated virus.
The Salk vaccine is less effective than the Sabin vaccine in preventing
polio.
The Salk vaccine provides lifelong immunity, while the Sabin vaccine
does not.
6. What are the two acceptable numbers of phases mentioned in the context of
cellular processes?
2 and 5
3 and 4
1 and 6
4 and 5
,7. Which of the following viruses has been effectively eradicated due to a
massive vaccination campaign in the 1970s?
chickenpox
monkeypox
cowpox
smallpox
8. Describe the purpose of using a simple stain in microscopy.
A simple stain is used to visualize the internal structures of cells.
A simple stain differentiates between types of bacteria based on their
cell wall composition.
A simple stain is used to enhance contrast in the microscopic
observation of cells, allowing for clearer visualization of their size
and shape.
A simple stain is used to identify specific proteins in cells.
9. Cultivation of chlamydia is possible
It is not possible
Only in liquid media
On selective culture media
On tissue cultures
10. Describe why LB media is preferred for expanding bacterial populations
compared to selective media like MacConkey agar.
LB media provides a nutrient-rich environment that supports the
growth of a wide range of bacteria, while selective media like
, MacConkey agar inhibit certain bacteria.
LB media is used for identifying bacteria, while MacConkey agar is
used for general growth.
LB media is designed to selectively isolate gram-positive bacteria,
unlike MacConkey agar which is for gram-negative bacteria.
LB media contains antibiotics that promote the growth of specific
bacteria, while MacConkey agar does not.
11. Based on this diagram, how are the light-capturing reactions and the Calvin
cycle interdependent on each other?
The Calvin cycle requires the ATP and NADPH produced in the
light-capturing reactions, while the inputs to the light-capturing
reactions are regenerated by the Calvin cycle.
The light-capturing reactions generate the ATP necessary to power
the Calvin cycle, while the Calvin cycle generates the NADPH needed
for the light-capturing reactions.
The Calvin cycle accepts the electrons generated by the light-
capturing reactions, while the light-capturing reactions regenerate the
NADP+ for the Calvin cycle.
100% Correct Answers | Latest Update 2026 | Biology
Exam Prep
1. In a dilution streak method, which plate typically contains the highest
concentration of bacteria?
P2
P4
P1
P3
2. Fatty acids are catabolized in
The pentose phosphate pathway
The Entner Doudoroff pathway
Glycolysis
beta-oxidation followed by the Krebs cycle
The electron transport chain
3. Describe the role of LPS in the structure of Gram-Negative bacteria and its
significance.
LPS is a type of protein that aids in cell division.
LPS is a carbohydrate that stores genetic information.
LPS contributes to the structural integrity of the outer membrane
and can trigger immune responses.
LPS is involved in energy production within the cell.
,4. If a new organism is discovered that is unicellular, eukaryotic, and capable of
photosynthesis, which kingdom would it most likely belong to?
Protista
Animalia
Bacteria
Fungi
5. Explain the primary difference in how the Salk and Sabin vaccines work to
protect against polio.
The Salk vaccine is administered orally, while the Sabin vaccine is
injected.
The Salk vaccine uses inactivated virus to stimulate an immune
response, while the Sabin vaccine uses live attenuated virus.
The Salk vaccine is less effective than the Sabin vaccine in preventing
polio.
The Salk vaccine provides lifelong immunity, while the Sabin vaccine
does not.
6. What are the two acceptable numbers of phases mentioned in the context of
cellular processes?
2 and 5
3 and 4
1 and 6
4 and 5
,7. Which of the following viruses has been effectively eradicated due to a
massive vaccination campaign in the 1970s?
chickenpox
monkeypox
cowpox
smallpox
8. Describe the purpose of using a simple stain in microscopy.
A simple stain is used to visualize the internal structures of cells.
A simple stain differentiates between types of bacteria based on their
cell wall composition.
A simple stain is used to enhance contrast in the microscopic
observation of cells, allowing for clearer visualization of their size
and shape.
A simple stain is used to identify specific proteins in cells.
9. Cultivation of chlamydia is possible
It is not possible
Only in liquid media
On selective culture media
On tissue cultures
10. Describe why LB media is preferred for expanding bacterial populations
compared to selective media like MacConkey agar.
LB media provides a nutrient-rich environment that supports the
growth of a wide range of bacteria, while selective media like
, MacConkey agar inhibit certain bacteria.
LB media is used for identifying bacteria, while MacConkey agar is
used for general growth.
LB media is designed to selectively isolate gram-positive bacteria,
unlike MacConkey agar which is for gram-negative bacteria.
LB media contains antibiotics that promote the growth of specific
bacteria, while MacConkey agar does not.
11. Based on this diagram, how are the light-capturing reactions and the Calvin
cycle interdependent on each other?
The Calvin cycle requires the ATP and NADPH produced in the
light-capturing reactions, while the inputs to the light-capturing
reactions are regenerated by the Calvin cycle.
The light-capturing reactions generate the ATP necessary to power
the Calvin cycle, while the Calvin cycle generates the NADPH needed
for the light-capturing reactions.
The Calvin cycle accepts the electrons generated by the light-
capturing reactions, while the light-capturing reactions regenerate the
NADP+ for the Calvin cycle.
