問題一覧
1
Bacteria that have an optimum growth temperature of about 60°C are known as
Thermophiles
2
The phase of bacterial growth in which there is no increase in number and presumably no cell death is
Lag phase
3
Why can you store honey at room temperature?
High osmotic pressure acts as a preservative
4
An organism that must have oxygen to live is
An obligate aerobe
5
An organism that can't tolerate any level of oxygen is
An obligate anaerobe
6
The two basic kinds of media used in the lab are
Solid and broth
7
Media that inhibits the growth of certain bacteria while allowing other types of bacteria to grow is
Selective
8
The phase of bacterial growth best defined by equilibrium between cell division and cell death is
Stationary phase
9
An organism that doesn't use oxygen but can tolerate it is
An aerotolerant anaerobe
10
An organism that can use oxygen for cellular respiration or can grow without oxygen by switching to fermentation is
A facultative anaerobe
11
The phase of bacterial growth in which nutrients have been used up and waste products accumulated to toxic levels is
Death phase
12
The phase of bacterial growth in which cell number is increasing most rapidly is
Log phase
13
Culture media provide bacteria with
Nutrients
14
Media for fastidious organisms
Enrichment
15
The phase of bacterial growth in which bacteria are more sensitive to chemical agents of growth control is
Log phase
16
An organism that requires oxygen at levels below that found in the atmosphere is
A microaerophile
17
A streak plate is made to
Isolate pure cultures
18
Bacteria that have an optimum growth temperature of about 37°C are known as
Mesophiles
19
Bacteria that have an optimum growth temperature of about 80°C are known as
Hyperthermophiles
20
Media that has a component to chemically remove molecular oxygen (02) that might interfere with the growth of anaerobes is
Reducing media