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Cell Cultivations

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

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

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Cell Cultivations
Thiobacillus thiooxidans has an optimum pH of

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

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

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Cell Cultivations
Callus cultures are amorphous cell aggregates arising from the unorganized growth of explants on an

liquid medium
aseptic solid nutrient medium
solid or liquid medium
solid nutrient medium

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Cell Cultivations
Suspension cultures consist of cells and cell aggregates, growing dispersed in

solid or liquid medium
none of these
solid nutrient medium
liquid medium

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Cell Cultivations
Which of the following is an abiotic elicitors?

All of these
Osmotic shock
UV irradiation
Heavy metal ions

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