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Microbiology: Chapter 7

35 Questions  I  By Kaiello
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1.  Need oxygen, but only will grow under low oxygen concentrations (soil, water) 
A.
B.
C.
D.
E.
2.  This phase of growth has little growth, and high metabolic activity. 
A.
B.
C.
D.
3.  This phase has exponential growth. 
A.
B.
C.
D.
4.  May use oxygen if present, but can exist without it (fermentation). This is an
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B.
C.
D.
E.
5.  Cannot tolerate oxygen. This is an example of 
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B.
C.
D.
E.
6.  Optimal temperatures are 50-60 degrees C, and range from 40-70. 
A.
B.
C.
D.
E.
7.  Most bacteria thrive in a neutral pH, some are called acidophiles whose optimal pH can be as low as what?
A.
B.
C.
D.
8.  CULTURE MEDIA: Solid 
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B.
9.  Which of these words describes when a cell is in its lowest possible temperate environment in which it can still grow?
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B.
C.
10.  Can cold kill bacteria?
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B.
11.  This phase has an exponential decline.
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D.
12.  Can grow at 0 degress C, optimum is about 20-30 degrees. Most important with food spoilage. 
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13.  The chemical need for atmospheric nitrogen (N2) is normally found within
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B.
C.
14.  Will not use oxygen, but it wont kill them. This is an...
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E.
15.  Which are the only two types of bacteria that humans come into contact with normally?
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D.
16.  In this phase the number of cells remains the same, because the rate of death equals the rate of growth. 
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D.
17.  In order to determine the number of bacterial cells present we must serially dilute the sample, and plate the dilution until a countable plate is reached. Then, count the colonies and multiply by the dilution factor. 
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B.
18.  Superoxide dismutase is an enzyme that helps the conversion of which of these?
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B.
C.
19.  Like all organisms, bacteria have both ______ and _______ requirements if they are to grow 
20.  Peroxidase is an enzyme that aids in the conversion of which of these? 
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B.
C.
21.  Bacterial cells grow how?
A.
B.
C.
22.  Which of these words describes when a cell is in its highest temperate environment in which it can still grow?
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B.
C.
23.  Optimum temperatures are 80 degrees C or greater (usually archea). Found in volcanoes 
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E.
24.  Which of these words describes when a cell is in an environment of its "best growth"
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B.
C.
25.  This chemical requirement, phosphorous, is taken in with inorganic phosphate (PO4^(-3)) 
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C.
26.  The need for oxygen to live is an....
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E.
27.  Bacteria divide by which of the following?
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B.
C.
28.  Catalase is an enzyme that aids in the conversion of which of these?
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B.
C.
29.  Can grow at 0 degrees C, optimum at <15 degrees. Are considered obligate with respect to cold. Live normally in arctic conditions. 
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B.
C.
D.
E.
30.  Growth usually refers to the increase in which of these
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B.
31.  CULTURE MEDIA: Liquid
A.
B.
32.  Halophiles are a type of bacteria that can exist in this type of condition. 
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B.
C.
33.  Optimal temperatures of 35-40 degrees C, range 10-50. They are the most common, most pathogens are this type. 
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34.  Generation time is the time it takes for one cell to become 
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C.
35.  The chemical need for ammonia, nitrate, or nitrite is found within 
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B.
C.
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