A 55-year-old man has been diagnosed with Stokes-Adams syndrome. Two minutes after the syndrome starts to cause active blockade of the cardiac impulse, which of the following is the pacemaker of the heart?

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#Question id: 21754

#Unit 12. Biochemical Engineering

dilution of a microbial culture was prepared by adding 1 ml of the culture to 9 ml of sterile blank. Further, 200 𝝁𝑳 from the diluted culture was spread on an agar plate; and 150 colonies were observed after the incubation period. Calculate the CFU/mL of the original sample

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#Question id: 21644

#Unit 12. Biochemical Engineering

In an exponentially growing batch culture of Saccharomyces cerevisiae, the cell density is 30 𝒈𝑳^−𝟏(𝑫𝑪𝑾), the specific growth rate (𝝁) is 𝟎.𝟒𝒉^−𝟏 and substate uptake rate (𝒒) is 𝟏𝟖𝒈𝑳^−𝟏𝒉^−𝟏. The cell nyield coefficient 𝒀𝒙/𝒔 will be

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#Question id: 21671

#Unit 12. Biochemical Engineering

A stirred tank bioreactor of 𝟐.𝟕𝒎^𝟑 is agitated using a Rushton turbine with diameter 0.5 m and stirrer speed of 𝟏 𝒔^−𝟏. If the fermentation broth has viscosity and density of 𝟏𝟎^−𝟐 𝒑𝒂.𝒔 and 𝟏𝟎𝟎𝟎𝒌𝒈.𝒎^−𝟑 respectively, the mixing time (in seconds) for the bioreactor will be

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#Question id: 21690

#Unit 12. Biochemical Engineering

A bacterial population, growing in batch culture, increases from 1000 cells to 10,00,000 cells in 5 hours. What is the generation time of the bacteria?

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#Question id: 22773

#Unit 12. Biochemical Engineering

In a batch cultivation, during logarithmic growth phase, specific growth rate of culture virtually remains constant primarily because

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#Question id: 22778

#Unit 12. Biochemical Engineering

When the carbon source used is changed from glucose to methanol in a bioprocess, you would definitely expect higher