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Cell Cultivations

Cell Cultivations
Radical shifts in pH can be prevented by incorporating

a reducing agent
an oxidizing agent
any of these
a buffer

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Cell Cultivations
Semi-solid media, prepared with agar at concentrations of 0.5% or less are useful for the cultivation of

Lactobacilli
E.coli
Microaerophillic bacteria
all of these

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

Heat evolution
Nutrient composition
Viscosity
Cell dry weight

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Cell Cultivations
Thiobacillus thiooxidans has an optimum pH of

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

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Cell Cultivations
Anchorage -dependent cells require

nothing to do with the surface
either (a) or (b)
wettable surface for growth
dry surface for growth

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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
40-60μm in diameter and 200-300μm long
60-80μm in diameter and 300-400μm long

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