A genetically-engineered strain of yeast is cultured in a bioreactor at 30⁰C for production of heterologous protein. The oxygen requirement is 80 mmol 1-1 h-I; the critical oxygen concentration is 0.004 mM. The solubility of oxygen in the fermentation broth is estimated to be 10% lower than in water due to solute effects. What is the minimum mass-transfer coefficient necessary to sustain this culture if the reactor is sparged with air at approximately 1 atm pressure ?         

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#Question id: 15944

#Section 1: Engineering Mathematics

Consider the following in respect of two non-singular matrices A and B of same order:

a. Det (A+ B) = det A + det B

b. (A + B)^-1 = A^-1 + B^-1 

Which of the above is/are correct?

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#Question id: 10787

#Section 6: Plant, Animal and Microbial Biotechnology

Which structure represents cinnamic acid___

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#Question id: 12903

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

A gene isolation system that uses adapted vectors termed as_______

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#Question id: 1444

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is a proto-oncogene?

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#Question id: 14292

#Section 5: Bioprocess Engineering and Process Biotechnology

Consider the scale up of a fermentation from a 10L to 10000L while maintaining geometric similarity. Agitation speed was maintained at 500 rpm in the 10L fermenter. If scale up is done based on constant tip speed, then the agitation speed in the larger reactor should be 

rpm.