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Straighterline Microbiology 250 final Exam 2024 Questions and Answers $13.49   Add to cart

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Straighterline Microbiology 250 final Exam 2024 Questions and Answers

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EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024 Page 6/86 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 p...

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EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024




Straighterline Microbiology 250 final
Exam 2024 Questions and Answers

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 - Answer✔✔-Protozoa


Genetic material can be excised from one chromosome and directly integrated into another via




A. conjugation.




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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


B. transformation.




C. transduction.




D. transposons. - Answer✔✔-transposons.


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 - Answer✔✔-TH cell


Which of the following enzymes are used to amplify DNA during PCR?




A. restriction endonuclease
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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024




B. DNA polymerase




C. reverse transcriptase




D. DNA ligase - Answer✔✔-DNA polymerase


In the nitrogen cycle, which of the following steps involves removal of nitrogen from the

atmosphere by bacteria? - Answer✔✔-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? - Answer✔✔-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.




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, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


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. -

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


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. - 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


Select one:


a. ATP.


b. carotenoids.



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