Biotechnology - Vinegar and Citric Acid

Exercise :: Vinegar and Citric Acid - Section 1

  • Vinegar and Citric Acid - Section 1
6. 

What is the pH of the medium when sucrose is used as substrate for the production of citric acid?

A. 3
B. 4
C. 5
D. 6

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

7. 

In liquid surface culture 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 B

Explanation:

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8. 

In koji 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 A

Explanation:

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9. 

What is the pH of the medium when molasses is used as substrate for the production of citric acid?

A. 3
B. 4
C. 5
D. 6

Answer: Option C

Explanation:

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10. 

Which of the following nitrogen sources is added in the fermentation medium of citric acid production?

A. Ammonium salt
B. Urea
C. Both (a) and (b)
D. Peptone

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.