Micro 2020 Review sheet.docx - Nha Nguyen Micro 2020-02 Micro 2020 Review 1 What is the purpose of DNase What would you expect to see for an organism

Micro 2020 Review sheet.docx - Nha Nguyen Micro 2020-02...

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Nha Nguyen Micro 2020-02 Micro 2020 Review 1. What is the purpose of DNase? What would you expect to see for an organism that is positive for this type of test when incubated in a plate with DNA? - The purpose of DNase is to breakdown DNA. Clearing that develops around bacterial growth on the medium is an indication of DNase activity. 2. What is the difference between a Methyl Red Test and VP test? In other words what is the purpose of each. - The purpose of Methyl Red Test is to look for mix acid (more stable acid) - The purpose of VP test is to look for acetoin and 2,3 Butanediol (initial acid formation is unstable) 3. What are the three possible categories for the breakdown of red blood cells in blood agar? Define each of them - Alpha: hemolysis cells partial breakdown of the red blood cells - Beta: hemolysis complete breakdown of the red blood - Gamma: hemolysis no breakdown of red blood cells bacteria grows as normal on the plate 4. What are the components that make mannitol salt agar differential? What about selective?
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  • Fall '17
  • Jordan Vincent
  • Bacteria, DNA, Growth medium, Cell nucleus

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