A strain of Azotobacter vinelandii is cultured in a 15-m³ stirred fermenter for alginate produc- tion. Under current operating conditions, k_La is 0.17 s^-1. The solubility of oxygen in the broth is approximately 8 × 10^-3 kg m^-3.

(b) The bacteria suffer growth inhibition after copper sulphate is accidentally added to the fermentation broth just after the start of the culture. This causes a reduction in the oxygen uptake rate to 3 mmol g^-1 h^-1. What maximum cell concentration can now be supported by oxygen transfer in the fermenter?.....g/l

#Question id: 3917

#Section 3: Genetics, Cellular and Molecular Biology

For an RNA hairpin loop to form, the transcribed region of the DNA sequence must __.

#Question id: 13108

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

#Question id: 3809

#Section 3: Genetics, Cellular and Molecular Biology

MMR is a highly conserved biological pathway. Several human MMR proteins have been identified based on their homology to E. coli MMR proteins. Match the following

#Question id: 360

#Section 4: Fundamentals of Biological Engineering

Which of the following is considered to be a strong base (alkali)?

#Question id: 14164

#Section 4: Fundamentals of Biological Engineering

Stoichiometric equations are used to represent growth of microorganisms provided a ' molecular formula' for the cells is available. The molecular formula for biomass is obtained by measuring the amounts of C, N, H, O and other elements in cells. For a particular bacterial strain, the molecular formula was determined to be C_4.4H_7.30 _1.2N_0.86 . These bacteria are grown under aerobic conditions with hexadecane (C₁₆H₃₄) as substrate. The reaction equation describing growth is:

  Assuming 100% conversion, what is the yield of cells from hexadecane in g g^-l?