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Bacterial Growth and Enumeration

Bacteria increase in mass during
Log phase
Lag phase
Stationary phase
Every phase
Generation time can be calculated using
G=t/(3.3log(b/B))
G=t/0.693log(b/B))
G=t/3.3log(B/b))
G=t/0.693log(B/b))
Which statement is FALSE?
Aerobic bacteria need oxygen for growth
Tolerate anaerobes tolerate low levels of O2 but do not use
Microaerophilic bacteria tolerate low levels of O2 but do not use
O2 is toxic to anaerobic bacteria
 
Catalase enzyme
Eliminates H2O2
Eliminates OH radicals
Eliminates super oxide radicals
Breaks down cats
Psychrophiles grow best at
>45 deg
25-45 deg
0-20 deg
<0deg
What is the size of the pores used in memb filtration?
0.6mcm
4nm
4mcm
0.4mcm
Which of these is NOT a growth based method?
Gas consumption
Turbidimetry
Bioluminesence
Nucleic Acid Techniques
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