Microbiology Final Exam With Answers (14 Solved Questions)

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Straighterline Microbiology Final Exam PracticeBIO250_Saylor_V5Practice Questions1.In the nitrogen cycle, which of the following steps involves removal of nitrogen from theatmosphere by bacteria?a.Ammonificationb.Denitrificationc.Nitrificationd.Nitrogen fixationAnswer is d. In nitrogen fixation, nitrogen is removed from the atmosphere bynitrogen-fixing bacteria and converted to ammonia2.If enough H+ions are added to pure water to raise the H+concentration of the solution toten times higher than the original concentration, what is the resulting OH-concentrationof the solution?a.10-5Mb.10-6Mc.10-7Md.10-8MAnswer is d. The H+concentration would be 10-6M, resulting in the OH-being 10-8M3.Fungi are able to reproduce asexually by creating conidiospores and sponrangiospores.Which of the following is an accurate explanation for why it is advantageous that theyare also capable of sexual reproduction?a.Asexually produced offspring are more likely to compete for resources and will kill offthe parental fungib.Fungi normally produce sexually but produce asexually in harsh conditions such assevere droughtc.Offspring from two parents may have variations in form and function that contributeto survival of the species.d.Sexual reproduction produces more offspring at a faster rate than spore formationAnswer is c. Sexually produced offspring have traits from both parents and maydevelop variations that give them an advantage for survival.4.In a laboratory bacterial cell culture that had been infected by a virus, plaques are areasin whicha.Bacterial cells are resistant to the virus and have not been infectedb.There is no nutrient available for the bacteria to growc.The virus has spread and left behind the remains of dead cellsd.The virus has not yet spread to the area of cellsAnswer is c. Plaques are areas in which the bacteria have been destroyed by thevirus and all that remain are dead cells5.The sun’s energy is delivered as discrete packets that travel as waves and are calleda.ATPb.Carotenoidsc.NADPd.PhotonsAnswer is d.6.Which of the following is a characteristic of aerobic respiration?

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Microbiology Final Exam With Answers (14 Solved Questions)

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