What is agar used for in microbiology agar is used to

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14. What is agar used for in microbiology?Agar is used to create a solid, smooth surface onwhich microbes can grow.15. True or False. When performing a dilution streak a new (or sterilized) loop must be used for eachphase.True. Failure to do so would prevent the establishment of a dilution gradient, as thesame bacterial concentration would be spread across both phase regions.16. In order to encourage growth of a slow growing microbe what might a researcher do during aphase dilution streak?A researcher may either (1) opt to perform only a 3-phase dilutionstreak or (2) pass the loop through the previous phase multiple times (as opposed to onlyonce).17. True or False. To restrict the growth of a pathogenic microbe a researcher might decrease anincubator from 37°C to 25°C.True. Pathogenic strains of bacteria tend to grow faster thannon-pathogenic strains at 37°C, so researchers may set incubators at 25°C to restrict itsgrowth.18. Match the following symptoms with their respective diseases:1. Childhood skin disease near mouth/noseCA. Folliculitis2. Infection of thin, transparent scleral tissueDB. Scalded-skin syndrome3. Infection occurs at time of birthEC. Impetigo4. Pus-filled lesions on skin or hairAD. Conjunctivitis5. Ruptured pustules; treated with PenicillinBE. Ophthalmia Neonatorum
19. True or False. Staphylococcus is the only causative agent of conjunctivitis.False. There arebacterial (staph) and viral forms of conjunctivitis, both resulting in the inflammation of theconjunctiva and ‘pink eye.’

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Term
Spring
Professor
Renee Correll
Tags
Microbiology, Bacteria, researcher

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