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Straighterline Microbiology 250 final Exam 2024 Questions and Answers.
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Straighterline Microbiology 250 final Exam 2024 Questions and Answers.
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Straighterline Microbiology 250 final Exam 2024Questions and Answers
Which class of eukaryotic microorganisms can be subdivided into groups such as
b b b b b b b b b b b
b Mastigophora, Sarcodina, Ciliophora, and Apicomplexa?
b b b b
A. Helminths
b b
B. Algae
b
C. Protozoa
b
D. Fungi - answer-Protozoa
b b b
Genetic material can be excised from one chromosome and directly integrated into
b b b b b b b b b b b
b another via b
A. conjugation.
b
B. transformation.
b
C. transduction.
b
,D. transposons. - answer-transposons.
b b b
Which immune cell secretes numerous cytokines that help to coordinate the response of
b b b b b b b b b b b b
b other immune cells?
b b
A. B cell
b b
B. TH cell
b b
C. TC cell
b b
D. Platelets - answer-TH cell
b b b b
Which of the following enzymes are used to amplify DNA during PCR?
b b b b b b b b b b b
A. restriction endonuclease
b b
B. DNA polymerase
b b
C. reverse transcriptase
b b
D. DNA ligase - answer-DNA polymerase
b b b b b
,In the nitrogen cycle, which of the following steps involves removal of nitrogen from the
b b b b b b b b b b b b b b
b atmosphere by bacteria? - answer-nitrogen fixation, In nitrogen fixation, nitrogen is
b b b b b b b b b b
b removed from the atmosphere by nitrogen-fixing bacteria and converted to ammonia.
b b b b b b b b b b
If enough h+ ions are added to pure water to raise the H+ concentration of the solution to
b b b b b b b b b b b b b b b b b
b ten times higher than the original concentration, what is the resulting OH- concentration
b b b b b b b b b b b b
b of the solution? - answer-10 -8M
b b b b b
Fungi are able to reproduce asexually by creating conidiospores and sporangiospores.
b b b b b b b b b b
b Which of the following is an accurate explanation for why it is advantageous that they are
b b b b b b b b b b b b b b b
b also capable of sexual reproduction?
b b b b
Select one: b
a. Asexually produced offspring are more likely to compete for resources and will kill off
b b b b b b b b b b b b b b
b the parental fungi.
b b
b. Fungi normally produce sexually but produce asexually in harsh conditions such as
b b b b b b b b b b b b
b severe drought. b
c. Offspring from two parents may have variations in form and function that contribute to
b b b b b b b b b b b b b b
b survival of the species. b b b
d. Sexual reproduction produces more offspring at a faster rate than spore formation. -
b b b b b b b b b b b b b
b answer-Offspring from two parents may have variations in form and function that b b b b b b b b b b b
b contribute to survival of the species. b b b b b
, In a laboratory bacterial cell culture that has been infected by a virus, plaques are areas in
b b b b b b b b b b b b b b b b
b which
Select one: b
a. bacterial cells are resistant to the virus and have not been infected.
b b b b b b b b b b b b
b. there is no nutrient available for the bacteria to grow.
b b b b b b b b b b
c. the virus has spread and left behind the remains of dead cells.
b b b b b b b b b b b b
d. the virus has not yet spread to that area of cells. - answer-the virus has spread and left
b b b b b b b b b b b b b b b b b b
b behind the remains of dead cells.
b b b b b
The sun's energy is delivered as discrete packets that travel as waves and are called
b b b b b b b b b b b b b b
Select one: b
a. ATP.
b
b. carotenoids.
b
c. NADP.
b
d. photons. - answer-photons.
b b b
Which of the following is a characteristic of aerobic respiration?
b b b b b b b b b
Select one: b
a. Oxygen-containing ions act as the final electron acceptors in electron transport.
b b b b b b b b b b b
b. The process includes glycolysis, the Krebs cycle, and the electron transport chain.
b b b b b b b b b b b b
c. Aerobic respiration produces a total of 2 ATP molecules.
b b b b b b b b b
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