Biochemical Engineering - Fermentation Kinetics

Exercise :: Fermentation Kinetics - Section 1

16. 

An open system in which the growth rate is maintained by the removal and addition of media at such a rate as to maintain a constant cell density is called a

A. manostat
B. chemostat
C. turbidostat
D. culturostat

Answer: Option C

Explanation:

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17. 

Wash out in steady state fermentation occurs when

A. dilution rate is less than maximum specific growth rate
B. dilution rate is higher than the maximum specific growth rate
C. cell concentration reaches the maximum
D. specific growth rate is maximum

Answer: Option B

Explanation:

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18. 

Fermentor should be filled with medium upto

A. 65-70%
B. 70-75%
C. 75-80%
D. 80-85%

Answer: Option C

Explanation:

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19. 

Bacterial growth curve is obtained by plotting

A. number of cells versus time
B. number fo spores versus time
C. log of number of cells versus time
D. log of number of cells survived versus time

Answer: Option C

Explanation:

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20. 

When intracellular enzymes of whole cells are to be used in a bio-conversion process, it is often necessary to____________the cells.

A. permeabilize
B. lyophilize
C. heat-kill
D. denature

Answer: Option A

Explanation:

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