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Industrially Useful Microbial Processes

Industrially Useful Microbial Processes
β-carotene is also known as

vitamin C
vitamin A
provitamin A
vitamin D

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Industrially Useful Microbial Processes
The enzyme which converts optically active isomers of lactic acid to the optically inactive racemic mixture is

dehydrogenase
isomerase
invertase
racemase

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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?

Co
Ca
Ni
Zn

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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.flavus
all of these
A. oryzae

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Industrially Useful Microbial Processes
Which species from the followings is resistant to methyl tryptophan?

B. subtilis
Hansenula anomala
Candida utilis
E. coli

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Industrially Useful Microbial Processes
The commonly used media for submerged bacterial fermentation at commercial scale is

liver extract
none of these
beet molasses
germinated seed

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