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Cell Cultivations

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

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

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Cell Cultivations
The protoplast can be used to

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

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Cell Cultivations
The size of a single plant cell is usually within the range of

10-20μm in diameter and 25-100μm long
20-40μm in diameter and 100-200μm long
60-80μm in diameter and 300-400μm long
40-60μm in diameter and 200-300μm long

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

Viscosity
Cell dry weight
Nutrient composition
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

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

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

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

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