Please answer the following questions. No Plagiarism. Thank You!

Chapter 2 questions

1.      What are mechanisms of antimicrobial action of Triclosan and Povidone? –

2.     What are concentrations of ethanol or propanol alcohol required for hand antiseptics? –

3.     Why isn’t 100% ethanol effective against bacteria? – .

4.     What are two the least resistant and two the most resistant forms of microbes? –

5.      Is human immunodeficiency virus (HIV) resistant to disinfectants and antiseptics? Yes or No. Explain your answer –

6.      Is ethyl alcohol an antiseptic or a disinfectant? –

7.     What is the difference between antiseptics and disinfectants? –

8.      Name disinfectants effective in killing bacterial endospores –

9.      Is soap effective as an antiseptic? Yes or No. Explain your answer –

10.   Name 3 or more bacterial genera whose species make up the normal flora of human skin –

Chapter 9 questions

1.     Why do bacterial and fungal colonies look different? (up to 500 characters) –

2.     Other than agar what else can be used as solidifying agent in media suitable for bacterial cultivation? Give 2 examples or more –

3.      What is the advantage of growing bacteria on solid media? –

4.     Colony size, color, and shape are critical in description of bacterial growth on solid medium. What are 3 other crucial factors,

not description of colony or a microbe itself, are typically included in description of bacterial growth on solid medium? –

5.     How can you prove that the bacterial colony contains a pure culture? –

6.     If you found the colony to be a mixture of organisms, what could you do to isolate them as pure cultures? –

7.     You have coughed on the plate and there is no growth after incubation. Suggest 2 or more reasons why no bacterial growth was observed on the plate –

Chapter 12 questions

1.     What is the difference between spontaneous mutation and induced mutation? –

2.     What is the damage UV light causing to DNA? –

3.      Define term mutagen. Give two examples of mutagens –

4.      How is nitrous acid causing mutations in DNA? –

5.     Both nitrous acid and ethidium bromide are causing mutations in DNA. Which compound is more dangerous? Explain your answer –

6.      Explain the molecular basis for sickle-cell disease (up to 500 characters) –

7.     In lab experiments the lids of Petri dishes were removed during exposure of bacteria to UV light. Explain why –


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