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Cell Cultivations

Cell Cultivations
Thiobacillus thiooxidans has an optimum pH of

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

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Cell Cultivations
Radical shifts in pH can be prevented by incorporating

a reducing agent
any of these
an oxidizing agent
a buffer

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

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

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Cell Cultivations
Anchorage -dependent cells require

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

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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
any of these
boiling the media for several minutes

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Cell Cultivations
Which of the following is an abiotic elicitors?

Osmotic shock
All of these
UV irradiation
Heavy metal ions

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