STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
Which class of eukaryotic microorganisms can be subdivided into groups such as
Mastigophora, Sarcodina, Ciliophora, and Apicomplexa?
A. Helminths
B. Algae
C. Protozoa
D. Fungi - (ANSWERS)Protozoa
Genetic material can be excised from one chromosome and directly integrated into
another via
A. Conjugation.
B. Transformation.
C. Transduction.
D. Transposons. - (ANSWERS)transposons.
Which immune cell secretes numerous cytokines that help to coordinate the
response of other immune cells?
A. B cell
B. TH cell
, STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
C. TC cell
D. Platelets - (ANSWERS)TH cell
Which of the following enzymes are used to amplify DNA during PCR?
A. Restriction endonuclease
B. DNA polymerase
C. Reverse transcriptase
D. DNA ligase - (ANSWERS)DNA polymerase
In the nitrogen cycle, which of the following steps involves removal of nitrogen
from the atmosphere by bacteria? - (ANSWERS)nitrogen fixation, In nitrogen
fixation, nitrogen is removed from the atmosphere by nitrogen-fixing bacteria and
converted to ammonia.
If enough h+ ions are added to pure water to raise the H+ concentration of the
solution to ten times higher than the original concentration, what is the resulting
OH- concentration of the solution? - (ANSWERS)10 -8M
Fungi are able to reproduce asexually by creating conidiospores and
sporangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction?
Select one:
A. Asexually produced offspring are more likely to compete for resources and will
kill off the parental fungi.
, STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
B. Fungi normally produce sexually but produce asexually in harsh conditions such
as severe drought.
C. Offspring from two parents may have variations in form and function that
contribute to survival of the species.
D. Sexual reproduction produces more offspring at a faster rate than spore
formation. - (ANSWERS)Offspring from two parents may have variations in form
and function that contribute to survival of the species.
In a laboratory bacterial cell culture that has been infected by a virus, plaques are
areas in which
Select one:
A. Bacterial cells are resistant to the virus and have not been infected.
B. There is no nutrient available for the bacteria to grow.
C. The virus has spread and left behind the remains of dead cells.
D. The virus has not yet spread to that area of cells. - (ANSWERS)the virus has
spread and left behind the remains of dead cells.
The sun's energy is delivered as discrete packets that travel as waves and are called
Select one:
A. ATP.
B. Carotenoids.
C. NADP.
D. Photons. - (ANSWERS)photons.
Which of the following is a characteristic of aerobic respiration?
Select one:
A. Oxygen-containing ions act as the final electron acceptors in electron transport.
B. The process includes glycolysis, the Krebs cycle, and the electron transport chain.
, STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
C. Aerobic respiration produces a total of 2 ATP molecules.
D. Aerobic respiration produces lactic acid. - (ANSWERS)The three stages of
aerobic respiration are glycolysis, the Krebs cycle, and the electron transport chain.
N completing protein synthesis in a prokaryote, what basic message is carried by a
specialized codon that has no corresponding trna?
Select one:
A. "Fold peptide chain."
B. "Terminate here."
C. "Add cofactor."
D. "Clip starting amino acid." - (ANSWERS)"Terminate here." The specialized
codon signals the end of protein synthesis; there is not RNA because it is only
needed if the process is to continue.
Microbial drug resistance can be caused by mutations or by introduction of new
genes into a population. Which of the following can only be caused by the
introduction of new genes into a population?
Select one:
A. A metabolic pathway in the bacterium is shut down
B. Binding sites for the drug are reduced in number or affinity to the drug
C. New enzymes that inactivate the drug are synthesized
D. Uptake of the drug into the bacterium is diminished - (ANSWERS)new enzymes
that inactivate the drug are synthesized. This can only occur if new genes are
introduced into the population.
Why do the hands, feet, and breasts have more lymphatic vessels for host defense
than other areas of the human body?
Select one:
A. They have a high risk for infection due to frequent contact.
ALREADY GRADED A+/ 2026
Which class of eukaryotic microorganisms can be subdivided into groups such as
Mastigophora, Sarcodina, Ciliophora, and Apicomplexa?
A. Helminths
B. Algae
C. Protozoa
D. Fungi - (ANSWERS)Protozoa
Genetic material can be excised from one chromosome and directly integrated into
another via
A. Conjugation.
B. Transformation.
C. Transduction.
D. Transposons. - (ANSWERS)transposons.
Which immune cell secretes numerous cytokines that help to coordinate the
response of other immune cells?
A. B cell
B. TH cell
, STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
C. TC cell
D. Platelets - (ANSWERS)TH cell
Which of the following enzymes are used to amplify DNA during PCR?
A. Restriction endonuclease
B. DNA polymerase
C. Reverse transcriptase
D. DNA ligase - (ANSWERS)DNA polymerase
In the nitrogen cycle, which of the following steps involves removal of nitrogen
from the atmosphere by bacteria? - (ANSWERS)nitrogen fixation, In nitrogen
fixation, nitrogen is removed from the atmosphere by nitrogen-fixing bacteria and
converted to ammonia.
If enough h+ ions are added to pure water to raise the H+ concentration of the
solution to ten times higher than the original concentration, what is the resulting
OH- concentration of the solution? - (ANSWERS)10 -8M
Fungi are able to reproduce asexually by creating conidiospores and
sporangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction?
Select one:
A. Asexually produced offspring are more likely to compete for resources and will
kill off the parental fungi.
, STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
B. Fungi normally produce sexually but produce asexually in harsh conditions such
as severe drought.
C. Offspring from two parents may have variations in form and function that
contribute to survival of the species.
D. Sexual reproduction produces more offspring at a faster rate than spore
formation. - (ANSWERS)Offspring from two parents may have variations in form
and function that contribute to survival of the species.
In a laboratory bacterial cell culture that has been infected by a virus, plaques are
areas in which
Select one:
A. Bacterial cells are resistant to the virus and have not been infected.
B. There is no nutrient available for the bacteria to grow.
C. The virus has spread and left behind the remains of dead cells.
D. The virus has not yet spread to that area of cells. - (ANSWERS)the virus has
spread and left behind the remains of dead cells.
The sun's energy is delivered as discrete packets that travel as waves and are called
Select one:
A. ATP.
B. Carotenoids.
C. NADP.
D. Photons. - (ANSWERS)photons.
Which of the following is a characteristic of aerobic respiration?
Select one:
A. Oxygen-containing ions act as the final electron acceptors in electron transport.
B. The process includes glycolysis, the Krebs cycle, and the electron transport chain.
, STRAIGHTERLINE MICRO 250 FINAL PREP/ ACTUAL EXAM Q&A/
ALREADY GRADED A+/ 2026
C. Aerobic respiration produces a total of 2 ATP molecules.
D. Aerobic respiration produces lactic acid. - (ANSWERS)The three stages of
aerobic respiration are glycolysis, the Krebs cycle, and the electron transport chain.
N completing protein synthesis in a prokaryote, what basic message is carried by a
specialized codon that has no corresponding trna?
Select one:
A. "Fold peptide chain."
B. "Terminate here."
C. "Add cofactor."
D. "Clip starting amino acid." - (ANSWERS)"Terminate here." The specialized
codon signals the end of protein synthesis; there is not RNA because it is only
needed if the process is to continue.
Microbial drug resistance can be caused by mutations or by introduction of new
genes into a population. Which of the following can only be caused by the
introduction of new genes into a population?
Select one:
A. A metabolic pathway in the bacterium is shut down
B. Binding sites for the drug are reduced in number or affinity to the drug
C. New enzymes that inactivate the drug are synthesized
D. Uptake of the drug into the bacterium is diminished - (ANSWERS)new enzymes
that inactivate the drug are synthesized. This can only occur if new genes are
introduced into the population.
Why do the hands, feet, and breasts have more lymphatic vessels for host defense
than other areas of the human body?
Select one:
A. They have a high risk for infection due to frequent contact.
