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Cell Cultivations

Cell Cultivations
For most bacteria, the optimum pH for growth lies between

3.5-4.5
6.5-7.5
4.5-5.5
5.5-6.5

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Cell Cultivations
Thiobacillus thiooxidans has an optimum pH of

6.5-7.5
0.5-6.0
2.0-3.5
9.0-9.5

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Cell Cultivations
Stringent anaerobes can be grown in a media by taking special measure as

boiling the media for several minutes
addition of cysteine
any of these
passing through oxygen-free nitrogen

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Cell Cultivations
The protoplast can be used to

modify genetic information
all of these
create plant hybrid
study plant viral infections

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Cell Cultivations
Which of the following is not an indirect method for the measurement of cell mass?

Nutrient composition
Cell dry weight
Viscosity
Heat evolution

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Cell Cultivations
The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of

400-500nm
600-700nm
300-400nm
500-600nm

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