Microbiology: Chapter 7

35 Questions  I  By Kaiello

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