A patient can produce antibodies against some bacterial pathogens, but he does not produce antibodies against viral infections. This is probably due to a disorder in which cells of the immune system?

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#Question id: 31850

#Unit 12. Biochemical Engineering

Which one of the following is the Del factor value for sterilizing a culture medium containing 10¹¹ viable bacterial cells? 

TLS Online TPP Program

#Question id: 31851

#Unit 12. Biochemical Engineering

Exponential growth of a bacterial culture in batch mode is usually defined by the equation dX/dt = µX, where µ is

TLS Online TPP Program

#Question id: 31852

#Unit 12. Biochemical Engineering

During a fermentation process, the feed is sterilized using wet-heat sterilization method. What will happen to D-value, if the solute concentration in the feed increases by fourfold?

TLS Online TPP Program

#Question id: 31854

#Unit 12. Biochemical Engineering

The penicillin extraction process involves the following steps:

A. Extraction from the organic solvent into an aqueous buffer

B. Extraction from the aqueous buffer into an organic solvent

C. Extraction of penicillin from the filtered broth into organic solvent

D. Extraction of solvent to obtain penicillin salt

Choose the correct sequence of steps from the options given below :

TLS Online TPP Program

#Question id: 31857

#Unit 12. Biochemical Engineering

Bacillus polymyxa strain was cultivated under anaerobic condition in a media containing 10 g/L glucose as the sole carbon source. The glucose was completely utilized in 10 h producing 2, 3-Butanediol with productivity of 5 g/L/h. What is the yield of 2, 3- Butanediol produced per gram of glucose consumed (g/g)? 

TLS Online TPP Program

#Question id: 31858

#Unit 12. Biochemical Engineering

If the partitioning coefficient (K) of a solute is 20 when it is extracted by an organic solvent from culture medium, what is the amount of solvent required per litre of culture medium to extract 90% of the solute in a single equilibrium stage?