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Microbiology Test Questions and All Correct Answers.

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    Microbiology Test Questions and All Correct Answers.

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  • Distinguish among types of symbiosis - Answer Mutualism Commensalism Parasitism Normal Microbiota - Answer The microbes that colonized the surfaces of the body without normally causing disease Two main types of the normal microbiota - Answer Resident Transient Resident - Answer Remain a part of the normal microbiota of a person throughout life Most are commensal Begin gaining your resident microbiota as you pass through the birth canal Transient - Ans...
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Microbiology M250 Final Exam Questions All Solved Correctly.

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    Microbiology M250 Final Exam Questions All Solved Correctly.

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  • Quorum Sensing (intra-species) - Answer LuxI--> autoinducers --> LuxR binds to autoinducers -->bioluminescence Quorum Sensing (inter-species) - Answer LuxS --> AI2 autoinducer --> binds to LuxPQ --> phosphorylates LuxO--> activates LitR --> activates LuxR --> begin transciption --> bioluminescence Numerical Taxonomy - Answer Grouping organisms based on their similar traits DNA/DNA Hybridization - Answer comparing organisms based on t...
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Microbiology M250 Exam 1 IU Van Kessel Test Questions Fully Solved.

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    Microbiology M250 Exam 1 IU Van Kessel Test Questions Fully Solved.

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  • microbiology - Answer study of small (microscopic) organisms tree of life - Answer bacteria on one side; archaea and eukarya on the other structural characteristics of bacteria - Answer -~1 micrometer in length - lack organelles -store DNA in nucleoid (no membrane) -have circular chromosomes -70S ribosomes -peptidoglycan cell wall prokaryotes - Answer bacteria and archaea (have nucleoid) structural characteristics of eukaryotes - Answer -large -mem...
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M250 - Microbiology: Organisms of the Week Questions and Answers.

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    M250 - Microbiology: Organisms of the Week Questions and Answers.

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  • Streptococcus pneumoniae - Answer -Mistaken for a eukaryotic fungus -Gram positive, soil bacterium -Linear chromosomes -Hyphal growth, cell division is rare -Multiple chromosomes per cell -Developmental cycle -Sporulation -Polyketide antibiotics -Problem with linear chromosomes: Can't replicate ends of chromosomes. Tpg proteins somehow fill in the DNA gap. Yersinia pestis - Answer -Causes Bubonic plague -Black Death () killed 30% of Europe's population -Carried bet...
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M250 Final Exam Questions Fully Solved.

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    M250 Final Exam Questions Fully Solved.

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  • bacterial species - Answer a collection of strands that share important traits and 70% DNA/DNA genome hybridization with a type strand type strain - Answer an arbitrarily selected bacterial strain that has all of the hallmark traits of the species to which it belongs numerical taxonomy - Answer compare organisms based on similar traits - what is closest to "type strain"? DNA/DNA hybridization - Answer compare organisms based on total genome similarity >...
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M250 Exam 4 Test Questions And All Correct Answers.

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    M250 Exam 4 Test Questions And All Correct Answers.

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  • During conjugation... - Answer The donor cell actively transports DNA out of itself Which of part of the bacterial flagellum is assembled last? - Answer Filament The inter-species quorum sensing autoinducer AI-2 is... - Answer Bound by membrane receptors Changing the antigens on the bacterial cell surface as a defense against attack is called... - Answer Phase Variation What is the most accurate term to describe the flagellar arrangement shown in the sketch at...
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M250 Exam 3 Practice Questions and Answers.

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    M250 Exam 3 Practice Questions and Answers.

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  • Bacillus subtilis - Answer Gram-positive found in soil industrial workhouse: produces proteases, riboflavin, fungicide Powerful genetic system "competent" takes up free DNA from the environment sporulation, cascade of sigma factors Fremyella diplosiphon - Answer cyanobacterium fixes carbon, fixes nitrogen heterocysts protect nitrogenase oxygenic photosynthesis makes gas vesivles "chromatic acclimation" In green light, makes green absorbing pigment- default ...
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M250 Exam 2 Study Guide Questions All Solved Correctly.

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    M250 Exam 2 Study Guide Questions All Solved Correctly.

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  • FtsZ - Answer cell division protein forms contractile ring in center of cell & recruits cell wall synthesis machinery MinC - Answer inhibits FtsZ polymerization MinD - Answer membrane-bound anchor and MinC activator MinE - Answer determines FtsZ positioning by inhibiting MinC & MinD from the center Noc - Answer Nucleoid Occlusion -coats chromosome; inhibits FtsZ from polymerizing over chromosome Autolysins - Answer cell separases; peptidoglycan...
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M250 Exam 2 Review Questions All Answered.

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    M250 Exam 2 Review Questions All Answered.

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  • What conditions limit bacterial growth? - Answer temperature desiccation oxygen radiation acidity pressure chemicals nutrients Heat damages by: - Answer 1. disrupts membrane fluidity 2. melts/denatures proteins 3. dsDNA -> ssDNA Cold damages by: - Answer 1. shatters membrane 2. prevents proteins from bending and breaks them 3. slows metabolism Types of halotolerance: - Answer non-halophile halotolerant moderate halophile extreme halophile Type...
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Exam 1 M250 Study Guide Questions with Actual Detailed Answers 2025/2026 Updated.

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    Exam 1 M250 Study Guide Questions with Actual Detailed Answers 2025/2026 Updated.

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  • What is the "Tree of Life" and it's three branches? - Answer shows the evolutionary relatedness of organisms. 3 branches are eukarya, archaea, and bacteria In what 4 major ways to bacteria differ from eukarya? - Answer -bacteria have nucleoids (not a nucleus) -lack organelles -and have usually one circular chromosome -have a cell wall of peptidoglycan, where eukarya have no cell wall or one made of cellulose/chitin the feature of a bacterial cell that many antibiot...
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