Final Straighterline Microbiology
Questions And Answers With Verified
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C. Protozoa are a diverse group of organisms that often prove difficult to classify
into a taxonomy. - ANSWER✔✔ 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
D. Transposons contain DNA that codes for enzymes that remove it from one site
in the genome and integrate it into another. - ANSWER✔✔ Genetic material can
be excised from one chromosome and directly integrated into another via
A. conjugation.
B. transformation.
C. transduction.
D. transposons.
B. TH (or T Helper) cells mature in the thymus and become sensitized when it
binds to an antigen/MHC complex. Upon activation, it releases interleukins-2, -4, -
5, and -6, and interferon gamma which help to activate macrophages, B cells, and
TC cells. - ANSWER✔✔ Which immune cell secretes numerous cytokines that help
to coordinate the response of other immune cells?
A. B cell
, B. TH cell
C. TC cell
D. Platelets
B. DNA polymerase works during the extension stage of PCR by elongating a DNA
primer with nucleotides complementary to the template strand. - ANSWER✔✔
Which of the following enzymes are used to amplify DNA during PCR?
A. restriction endonuclease
B. DNA polymerase
C. reverse transcriptase
D. DNA ligase
d. nitrogen fixation
In nitrogen fixation, nitrogen in removed from the atmosphere by nitrogen-fixing
bacteria and converted to ammonia. - ANSWER✔✔ In the nitrogen cycle, which of
the following steps involves removal of nitrogen from the atmosphere by
bacteria?
Select one:
a. ammonification
b. denitrification
c. nitrification
d. nitrogen fixation
d. 10^-8 - ANSWER✔✔ 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?
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