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Industrially Useful Microbial Processes

Industrially Useful Microbial Processes
Which of the following when used in proper concentration stimulates the Ascomycetes fermentation of vitamin B12 and can be used to counteract toxicity of iron in Candida species?

Zn
Ca
Ni
Co

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Industrially Useful Microbial Processes
Pectinase, an enzyme used for increasing yield and for clarifying juice is obtained by

A. niger
A. oryzae
all of these
A.flavus

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Industrially Useful Microbial Processes
Most productive species among the different vitamin B12 producing Pseudomonads is

none of these
P. denitrificans
P. ovalis
P. aureofaciens

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Industrially Useful Microbial Processes
Cycloserine may be isolated from the cultures of

S. garyphalus
S. orchidaceus
S. lavendulae
All of these

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Industrially Useful Microbial Processes
β-carotene is also known as

vitamin C
vitamin D
provitamin A
vitamin A

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Industrially Useful Microbial Processes
The biotin level in obtaining L-gluatmic acid by fermentation using Micrococcus glutamicus is critical because

both (a) and (b)
None of these
too low level prevents growths, hence L-glutamic acid production
too high level prevents L-glutamic acid production

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