Microbiology: Chapter 7

35 Questions  I  By Kaiello on June 9, 2011

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