MB C6 Quiz

rovacivi's version from 2017-03-12 17:32


Question Answer
1. Most bacteria reproduce by binary fissionbinary fission
2. The type of cell reproduction in which a small, new cell develops from the surface of an existing cell and then separates from the parent cell is known as budding and is the normal mode of replication in yeastbudding...yeast
3. When a bacterial cell divides into two new cells, the new cells are called daughter cellsdaughter cells
4. A bacterial population grows most rapidly during log phaselog
5. A bacterial culture can be kept in the log phase of growth indefinitely with the help of a chemostatchemostat


Question Answer
6. Which of the following counting techniques doesn't differentiate between live and dead bacterial cells in a culturedirect microscopic count
7. Most bacteriado not immediately increase in number when placed in a culture
8. Bacterial growth in colonies on agar plateshave all phases of growth occurring simultaneously somewhere in the colony
9. An obligate psychrophile would produce a turbid culture at ________ degrees Celsius15
10. Capnophiles grow best under conditions ofhigh carbon dioxide


Question Answer
11. The toxic effects of the byproducts of oxygen metabolism are mitigated by which of the followingcatalase...superoxide dismutase...two of the above
12. When cells are placed in a hypertonic environment they will undergo ________plasmolysis
13. Starch would be broken down to maltose by which of the following exoenzymesamylase
14. Exoenzymesproduced by gram positive rods act in the medium around the organism...are released by the golgi apparatus into the cytoplasm where they act...produced by gram negative rods act in the periplamic space...two of the above
15. A decrease in the amount of nitrogen to a culture of Clostridium botulinum would inducesporulation


Question Answer
16. Which of the following does not contribute to endospores resistance to unfavorable conditionsgermination proper
17. The streak plate method produces pure cultures by separating individual bacterial cells from one another bydragging them across a solid surface
18. A growth medium consisting of only known amounts of water, magnesium, calcium chloride, potassium and glucose would be considereda defined synthetic medium


Question Answer
19. A media on which Gram positive organism turn green and Gram negative organisms turn blue would bedifferential
20. Bacteria that ferment lactose grow as red colonies on MacConkey agar while those that do not ferment lactose are pink. MacConkey agar can best be described as beingdifferential
21. A living, growing culture whose purpose is to maintain a pure culture of an organism indefinitely is astock culture
22. Nonculturable organismscan be identified based on their DNA