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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Which of the following has more tolerance for acidic pH (lower pH)?

Bacteria
None of these
E. coli
Yeast and moulds

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Growth and Nutrition of Bacteria
The microorganisms that grow best in a low-oxygen environment is called a (n)

anaerobe
facultative
microaerophile
aerobe

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Growth and Nutrition of Bacteria
Bacteria of genus Nitrosomonas use __________ as their electron source.

ammonia
H2S
succinate
light

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Growth and Nutrition of Bacteria
Nutrient content and biological structures are considered as

implicit factor for microbial growth
processing factor
intrinsic factor for microbial growth
None of these

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Growth and Nutrition of Bacteria
The combination of low levels of NaCl, NaNO3 (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

S. aureus
all of these
C. botulinum
Salmonella

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Growth and Nutrition of Bacteria
The term obligate anaerobe refers to an organism that

prefers to grow without oxygen
uses oxygen when present or grows without oxygen when oxygen is absent
is killed by oxygen
doesn't use oxygen but tolerates it

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