Final Exam Straighterline Microbiology UPDATED Exam Questions and CORRECT Answers
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Course
Straighterline Microbiology
Institution
Straighterline Microbiology
Final Exam Straighterline Microbiology
UPDATED Exam Questions and
CORRECT Answers
In the nitrogen cycle, which of the following steps involves removal of nitrogen from the
atmosphere by bacteria? - CORRECT ANSWER- Nitrogen Fixation
If enough H+ ions are added to pure water to raise the H+ co...
Final Exam Straighterline Microbiology
UPDATED Exam Questions and
CORRECT Answers
In the nitrogen cycle, which of the following steps involves removal of nitrogen from the
atmosphere by bacteria? - CORRECT ANSWER- Nitrogen Fixation
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? - CORRECT ANSWER- 10-8 M
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? - CORRECT ANSWER- 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... - CORRECT ANSWER- 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 -
CORRECT ANSWER- Photons
What is a characteristic of aerobic respiration? - CORRECT ANSWER- The process includes
glycolysis, the Krebs cycle, and the electron transport chain.
In completing protein synthesis in a prokaryote, what basic message is carried by a
specialized codon that has no corresponding tRNA? - CORRECT ANSWER- "Terminate
here."
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? - CORRECT ANSWER- new enzymes that inactivate the drug are synthesized
,Why do the hands, feet, and breasts have more lymphatic vessels for host defense than other
areas of the human body? - CORRECT ANSWER- They have a high risk for infection due to
frequent contact.
Penicillin functions as an antimicrobial agent by inhibiting bacterial... - CORRECT
ANSWER- cell wall synthesis.
Which class of eukaryotic microorganisms can be subdivided into groups such as
Mastigophora, Sarcodina, Ciliophora, and Apicomplexa? - CORRECT ANSWER- Protozoa
Genetic material can be excised from one chromosome and directly integrated into another
via... - CORRECT ANSWER- transposons
What immune cell secretes numerous cytokines that help to coordinate the response of other
immune cells? - CORRECT ANSWER- TH cell
What enzymes are used to amplify DNA during PCR? - CORRECT ANSWER- DNA
polymerase
Which of the following is a scientific name? - CORRECT ANSWER- Streptococcus
pyogenes
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 organism consumes lactose, acid will be produced, causing the bacterial
colonies to change color.
Based upon this description, this medium is ______ - CORRECT ANSWER- differential and
selective
A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the Last
Universal Common Ancestor would show Archaea - CORRECT ANSWER- branching off the
Domain Eukarya.
In the cell cytoplasm, molecules of ATP are a - CORRECT ANSWER- solute
, The _____ of the microscope holds and allows selection of the objective lenses. - CORRECT
ANSWER- nosepiece
Characteristics shared by all cells include - CORRECT ANSWER- the presence of cellular
fluid, the possession of genetic information, and a membrane serving as a cell boundary.
Anything that occupies space and mass is called... - CORRECT ANSWER- matter
Trees of life illustrate the phylogenetic relationships of all organisms were traditionally based
on _____; newer methods for determining phylogeny rely on _____. - CORRECT ANSWER-
Morphology; nucleic acid sequences
Covalent bonds - CORRECT ANSWER- result from sharing electrons
One nucleotide contains one - CORRECT ANSWER- phosphate, pentose sugar, nitrogen
base
Among the types of microorganisms, the ___. are noncellullar - CORRECT ANSWER-
viruses
Using microbes to detoxify a site contaminated with heavy metals is an example of ____ -
CORRECT ANSWER- Bioremediation
C6H12O6+C6H12O6---> C12H22O11+H2O - CORRECT ANSWER- a dehydration
synthesis
Which scientific field is involved in the identification, classification, and naming of
organisms? - CORRECT ANSWER- Taxonomy
Which type of medium would be the best choice when shipping a sample of bacteria from a
clinic to a laboratory for testing? - CORRECT ANSWER- Transport-meduim
Which activity is an example of biotechnology? - CORRECT ANSWER-
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