Straighterline Microbiology Final Exam With
100% Correct Answers 2024, Exams of
Nursing
1. In the nitrogen cycle, which of the following steps involves
removal of nitro- gen from the atmosphere by bacteria? ANS: Nitrogen Fixation
2. 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? ANS: 10-8 M
3. Fungi are able to reproduce asexually by creating conidiospores and spo-
rangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction? ANS: Ottspring
from two parents may have variations in form and function that contribute to survival of the species.
4. In a laboratory bacterial cell culture that has been infected by a virus, plaques
are areas in which... ANS: the virus has spread and left behind the remains of dead cells.
5. The sun's energy is delivered as discrete packets that travel as
waves and are called ANS: Photons
6. What is a characteristic of aerobic respiration? ANS: The process includes glycolysis, the
,Krebs cycle, and the electron transport chain.
7. In completing protein synthesis in a prokaryote, what basic message
is car- ried by a specialized codon that has no corresponding tRNA? ANS:
"Terminate here."
8. 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? ANS: new enzymes that inactivate the
drug are synthesized
9. Why do the hands, feet, and breasts have more lymphatic vessels for host
defense than other areas of the human body? ANS: They have a high risk for infection due to
frequent contact.
10. Penicillin functions as an antimicrobial agent by inhibiting bacterial... ANS: cell
wall synthesis.
11. Which class of eukaryotic microorganisms can be subdivided into
groups such as Mastigophora, Sarcodina, Ciliophora, and Apicomplexa? ANS:
Protozoa
12. Genetic material can be excised from one chromosome and directly
integrat- ed into another via... ANS: transposons
13. What immune cell secretes numerous cytokines that help to
coordinate the response of other immune cells? ANS: TH cell
, 14. What enzymes are used to amplify DNA during PCR? ANS: DNA polymerase
15. Which of the following is a scientific name? ANS: Streptococcus pyogenes
16. Eosin-methylene blue agar, or EMB, is a commonly used
bacteriological medium for growing gram-negative bacteria from
complex environments. It contains two dyes, eosin and methylene blue,
as well as the sugar lactose. Eosin is a pH indicator that changes
color when the medium is acidic, while methylene blue inhibits the
growth of most gram-positive bacteria. If an organ- ism consumes
lactose, acid will be produced, causing the bacterial colonies to
change color.
Based upon this description, this medium is ANS: ditterential and selective
17. A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding
from the Last Universal Common Ancestor would show Archaea ANS: branching
ott the Domain Eukarya.
18. In the cell cytoplasm, molecules of ATP are a ANS: solute
19. The of the microscope holds and allows selection of the
objective lenses. ANS: nosepiece
20. Characteristics shared by all cells include: ANS the presence of cellular fluid, the
possession of genetic information, and a membrane serving as a cell boundary.
21. Anything that occupies space and mass is called... ANS: matter
100% Correct Answers 2024, Exams of
Nursing
1. In the nitrogen cycle, which of the following steps involves
removal of nitro- gen from the atmosphere by bacteria? ANS: Nitrogen Fixation
2. 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? ANS: 10-8 M
3. Fungi are able to reproduce asexually by creating conidiospores and spo-
rangiospores. Which of the following is an accurate explanation for why it is
advantageous that they are also capable of sexual reproduction? ANS: Ottspring
from two parents may have variations in form and function that contribute to survival of the species.
4. In a laboratory bacterial cell culture that has been infected by a virus, plaques
are areas in which... ANS: the virus has spread and left behind the remains of dead cells.
5. The sun's energy is delivered as discrete packets that travel as
waves and are called ANS: Photons
6. What is a characteristic of aerobic respiration? ANS: The process includes glycolysis, the
,Krebs cycle, and the electron transport chain.
7. In completing protein synthesis in a prokaryote, what basic message
is car- ried by a specialized codon that has no corresponding tRNA? ANS:
"Terminate here."
8. 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? ANS: new enzymes that inactivate the
drug are synthesized
9. Why do the hands, feet, and breasts have more lymphatic vessels for host
defense than other areas of the human body? ANS: They have a high risk for infection due to
frequent contact.
10. Penicillin functions as an antimicrobial agent by inhibiting bacterial... ANS: cell
wall synthesis.
11. Which class of eukaryotic microorganisms can be subdivided into
groups such as Mastigophora, Sarcodina, Ciliophora, and Apicomplexa? ANS:
Protozoa
12. Genetic material can be excised from one chromosome and directly
integrat- ed into another via... ANS: transposons
13. What immune cell secretes numerous cytokines that help to
coordinate the response of other immune cells? ANS: TH cell
, 14. What enzymes are used to amplify DNA during PCR? ANS: DNA polymerase
15. Which of the following is a scientific name? ANS: Streptococcus pyogenes
16. Eosin-methylene blue agar, or EMB, is a commonly used
bacteriological medium for growing gram-negative bacteria from
complex environments. It contains two dyes, eosin and methylene blue,
as well as the sugar lactose. Eosin is a pH indicator that changes
color when the medium is acidic, while methylene blue inhibits the
growth of most gram-positive bacteria. If an organ- ism consumes
lactose, acid will be produced, causing the bacterial colonies to
change color.
Based upon this description, this medium is ANS: ditterential and selective
17. A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding
from the Last Universal Common Ancestor would show Archaea ANS: branching
ott the Domain Eukarya.
18. In the cell cytoplasm, molecules of ATP are a ANS: solute
19. The of the microscope holds and allows selection of the
objective lenses. ANS: nosepiece
20. Characteristics shared by all cells include: ANS the presence of cellular fluid, the
possession of genetic information, and a membrane serving as a cell boundary.
21. Anything that occupies space and mass is called... ANS: matter
