SCI250 Week 7 Final Examination 2017 (Perfect Answer)

Question1. Which of the following is NOT true of microorganisms?They produce antibiotics.They are used in the production of many types of food and beverages.They decompose dead animals.They all cause disease in humans.2. Which of the following is NOT one of the phases of bacterial growth?lag phasestationary phasedoubling phaselog phase3. Which of the following is NOT a differential stain?Gram stainSchaeffer-Fultonacid-fast stainflagellar stain4. In a properly executed Gram stain, Gram positive organisms appear ______ while Gram negative organisms appear ______pink, clear.pink, purple.purple, pink.purple, blue.5. Classification is necessary to _________establish criteria for identifying organisms.arrange related organisms into groups.provide information about how organisms evolved.All of the above6. An organism that lives at the expense of another organism is a ________host.commensal.parasite.symbiont.7. Undercooked pork is most likely to pass along ________Schistosoma.Tania.Wuchereria.Trichinella.8. Arthropods are responsible for transmitting _____ pathogens.viralbacterialprotozoanviral, bacterial, and protozoan9. Symbiosis is an association between ________two or more species.one or two species.two or more hosts.no species but all hosts.all species but not hosts.10. All of the following are true of the relationship between microorganisms and diseases EXCEPT:Sickle cell anemia patients are resistant to malaria.Bacterial infections can lead to endocarditis.Viral infections invariably lead to nutritional deficiency.Infections in the brain can result in mental disease.11. Which of the following represents the correct order of steps in a typical viruses replication cycle?Maturation, adsorption, penetration, releaseAdsorption, penetration, release, maturationAdsorption, penetration, synthesis, maturationAdsorption, penetration, maturation, synthesis12. What special group of chemical substances are used to treat diseases by microbes?AntibioticsSynthetic drugsSemi-synthetic drugsAntimicrobial agentsChemotherapeutic agents13. Which of the following is NOT considered a mode of action by antimicrobial agents?Action as an antimetaboliteInhibition of protein synthesisInhibition of cell wall sysnthesisInhibition of membrane permeabilityDisruption of selective toxicity14. All of the following characteristics are components of nonspecific host defenses EXCEPT:FeverMucusAntibodiesInterferonInflammation15. What name is given to a substance that is recognized by the body as foreign and normally produces an immune response?AntibodyAntigenAgglutininAntitoxinApoptosis16. There are a number of different species that can live on the skin as resident microflora. Which of the following is NOT considered resident microflora of the skin?StaphylococcusCorynebacteriumE. coliDemodexAll of the above17. Defense mechanisms in the urogenital system are numerous and include ________normal flora compete with opportunists.sphincter muscles.flushing action of fluids.low pH.All of the above18. Food poisoning can be caused by a variety of microbes. Which of the following pairs is incorrect?Clostridium botulinum — enterotoxin which is heat liableStaphylococcus aureus — enterotoxin which is heat stablePseudomonas cocovenenans — bongkrek diseaseBacillus cereus — toxin is an emeticClostridium perfringens — enterotoxin and wound infection19. The upper respiratory tract consists of the ________pharynx.nasal cavity.bronchi.All of the aboveOnly A and B20. Group B Streptococcal disease include ________early onset neonatal sepsis and meningitis.late onset neonatal meningitis.etiology is Streptococcus agalactiae.All of the aboveOnly A and C