Exam 2 Potential Questions

1. What is the difference between exponential growth and logarithmic growth?
-Brady Helmink

2. Describe the different phases of the bacterial growth curve.
-Brady Helmink

3. Compare and contrast the similarities and differences between antibiotics, antiseptics, and disinfectants.
-Brady Helmink

4. Do halophiles grow best in very low or high water activity? How are they able to do this?
-Brice Buryanek

5. What bacteria can grow in something with a water activity of 0.90?
-Brice Buryanek

6. Rank these liquids from lowest water activity to highest (honey, pure water, and human blood).
-Brice Buryanek.

7. What are the difference between antiseptics and disinfectants. Give an example for each.
-Hoa Le

8. What are the difference between strict and facultative anaerobes?
-Eileen Sorenson

9. What is omotic pressure?
-Eileen Sorenson

10. List the factors that influence bacterial growth rates.
-Eileen Sorenson

11. What are free radicals and how do they effect bacteria?
-Eileen Sorenson

12. What is the difference between anaerobes and aerobes?
-Brice Buryanek

13. How much oxygen do microaerophiles need to grow?
-Brice Buryanek

14. How much CO2 do capnophiles need to grow?
-Brice Buryanek

15. Is Strict or Facultative killed by oxygen?
-Brice Buryanek

16. What is a hemocytometer? How does it work?
-Eileen Sorenson

17. Why can't you see a virus using a light microscope?
-Eileen Sorenson

18. what are advantages and disadvantages of using electron microscopy?
-Shelby Pomerenke

19. what does the hawaiian bobtail squid have to do with quorum sensing?
-shelby pomerenke

20. What is the difference between a Bright and Dark field microscopy?
-Brice Buryanek

21. What type of microscope allows you to see the movement of organisms and slender structuress?
-Brice Buryanek

22. what is a hemocytometer? how does it work?
-Eileen Sorenson

23. define generation time.
-Eileen Sorenson

24. What does it mean when something spoils?
-Eileen Sorenson

25. why is the resolving power of an electron microscope so much smaller than that of a light microscope?
-Eileen Sorenson

26. why can't you see a virus using a light microscope?
-Eileen Sorenson

27. V. Fisheri are gram negative bacteria which are able to glow in the dark. If you see a bright glow in the agar tube the bacteria grow in, what does this mean? Choose all that apply.

a. the bacteria are growing at a high density
b. the bacteria are using quorum sensing to communicate
c. It's Halloween time
d. the bacteria are breaking down ATP to create energy to produce light

—Laci Swanson

28. draw the bacterial growth curve, and include all the phages?
~nhung nguyen

29. What do thermophiles and hyperthermophiles have in common? How are they different?
-Melissa Whiteley

30. What are biofilms and how are they associated with Pseudomonas aeruginosa?
-Kelsey Prosser

31. What are some of the advantages and disadvantages of bright field microscopy and dark field microscopy?
-Kelsey Prosser

32. What is Optical Density and how does a spectrophotometer work?
-Kelsey Prosser

33. What does a hemocyometer do? And what are some characteristics of it?
-Brandon Waszgis

34. What is the difference between a pour plat and a spread plate?
-Brice Buryanek

35. Explain the process for when a single bacterium divides.
-Brice Buryanek

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