Biotechnology - Vinegar and Citric Acid

Exercise :: Vinegar and Citric Acid - Section 1

  • Vinegar and Citric Acid - Section 1
11. 

In submerged process for the fermentation to produce citric acid,

A. A. niger is used with solid substrate as sweet potato
B. A. niger floats on the surface of solution
C. Fungal mycelium grows through out the solution in a deep tank
D. both (a) and (b)

Answer: Option C

Explanation:

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12. 

Which substrate is used in the fermentation of citric acid?

A. Beet molasses
B. Sucrose
C. Starch hydrolysate
D. All of these

Answer: Option D

Explanation:

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13. 

Alegar is a type of vinegar produced from

A. fruit juices
B. malted grain
C. ethanol
D. ale

Answer: Option D

Explanation:

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14. 

During recovery step of citric acid, calcium citrate formed is treated with which of the following acid to precipitate calcium?

A. HCl
B. HNO3
C. H2SO4
D. None of these

Answer: Option C

Explanation:

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15. 

Vinegar production consists of

A. aerobic fermentation
B. anaerobic fermentation
C. aerobic fermentation followed by anaerobic fermentation
D. anaerobic fermentation followed by aerobic fermentation

Answer: Option D

Explanation:

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