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Growth and Nutrition of Bacteria

Growth and Nutrition of Bacteria
Implicit factors

None of these
both (a) and (b)
can be synergistic
depend on developing microflora

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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

C. botulinum
Salmonella
all of these
S. aureus

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

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

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Growth and Nutrition of Bacteria
The fragmentation occurs in

Bacillus subtilis
Streptomyces species
None of these
Nocardia species

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Growth and Nutrition of Bacteria
Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as

chemotrophs
fastidious hetrotrophs
photo-organotrophs
chemo-lithotrophs

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Growth and Nutrition of Bacteria
Autotrophic bacteria are those which

produce a blue-green pigment
form a long chain glycocalyx
make their own food
are highly susceptible to penicillin

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