It is assumed that every colony observed on a streak plate arose from a single bacterium.
Indicate whether this statement is true or false.
In the cultivation of microaerophilic and anaerobic bacteria,
A. a(n) candle/anaerobe jar is sufficient.
B. atmospheric oxygen in a(n) candle/anaerobe jar is converted to water.
C.
a packet containing chemicals that generate carbon dioxide and hydrogen is used in a(n) candle/anaerobic jar.
D. oxidizing agents are incorporated into the media that react with oxygen.
Agar replaced gelatin as the gelling (solidifying) agent for media because
A. agar is much cheaper.
B. much fewer bacteria can break down agar than gelatin.
C. agar is solid at body temperature.
D. gelatin became unavailable during World War II.
E. much fewer bacteria can break down agar than gelatin AND agar is solid at body temperature.
Agar
A. is a useful nutrient source for most bacteria.
B. is a hydrolysate of proteins.
C. stays liquid through the typical range of incubation temperatures.
D. has chemical and physical properties that make it almost ideal for solidifying media.
A medium that inhibits the growth of organisms other than the one being sought is termed a(n)
A. synthetic medium.
B. specific culture medium.
C. selective medium.
D. enrichment medium.
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