TLS Online TPP Program

#Question id: 4347


According to the lac operon model proposed by Jacob and Monod, what is predicted to occur if the operator is removed from the operon?

#SCPH05 I Biotechnology
  1. The lac operon would be transcribed continuously.

  2. Only lacZ would be transcribed.

  3. Only lacY would be transcribed.

  4. Galactosidase permease would be produced, but would be incapable of transporting lactose.

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TLS Online TPP Program

#Question id: 14277

#SCPH05 I Biotechnology

Lactobacillus casei is propagated under essentially anaerobic conditions to provide a starter culture for manufacture of Swiss cheese. The culture produces lactic acid as a by-product of energy metabolism. The system has the following characteristics:

                                                                 

 

A stirred fermenter is operated in fed-batch mode at quasisteady state with a feed flow rate of 4 m3 h-1 and feed substrate concentration of 80 kg m-3. After 6 h, the liquid volume is 40 m3. What mass of cells is produced after 6 h fed-batch operation?

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TLS Online TPP Program

#Question id: 14278

#SCPH05 I Biotechnology

Stirrer has a power number (Np) 10. If the stirrer speed (N) is 1s^-1, its diameter D=1m and the density of the medium is 1000 kg/m^3, the ungassed power input (P) in watts is 

TLS Online TPP Program

#Question id: 14278

#SCPH05 I Biotechnology

Stirrer has a power number (Np) 10. If the stirrer speed (N) is 1s^-1, its diameter D=1m and the density of the medium is 1000 kg/m^3, the ungassed power input (P) in watts is 

TLS Online TPP Program

#Question id: 14279

#SCPH05 I Biotechnology

Growth yield of mDicrobes is defined as

TLS Online TPP Program

#Question id: 14279

#SCPH05 I Biotechnology

Growth yield of mDicrobes is defined as

TLS Online TPP Program

#Question id: 14280

#SCPH05 I Biotechnology

In microbial cultivation, the expression for product synthesis