TLS Online TPP Program

#Question id: 3021


The lag phase of the bacterial growth curve is marked by

#Section 6: Plant, Animal and Microbial Biotechnology
  1. a decrease in cell mass.

  2. dormant, metabolically inactive cells.

  3. metabolically active cells.

  4. vigorously dividing cells.

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TLS Online TPP Program

#Question id: 27519

#Section 5: Bioprocess Engineering and Process Biotechnology

The destruction of the cells takes place during following treatment processes

TLS Online TPP Program

#Question id: 15629

#Section 4: Fundamentals of Biological Engineering

Vortexing in a stirred tank reactor can be prevented by using

TLS Online TPP Program

#Question id: 639

#Section 2: General Biology

Match the coenzymes in column I enzymes to class of enzymes in column II

A. Phosphofructokinase

1. Redox reaction

B. Enolase

2. Phosphoryl shift

C. Phosphoglycerate mutase

3. Dehydration

D. Glyceraldehyde 3 Phosphate dehydrogenase

4. Phosphoryl transfer

TLS Online TPP Program

#Question id: 3036

#Section 2: General Biology

During which phase would penicillin, an antibiotic that inhibits cell-wall synthesis, be most effective?

TLS Online TPP Program

#Question id: 14226

#Section 5: Bioprocess Engineering and Process Biotechnology

A fermenter is maintained at 35⁰C by water circulating at a rate of 0.5 kg s^-1 in a cooling coil inside the vessel. The inlet and outlet temperatures of the water are 8⁰C and 15⁰C respectively. The length of the cooling coil is increased by 50%. In order to maintain the same fermentation temperature, the rate of heat removal must be kept the same. Determine the new cooling-water flow rate and outlet temperature by carrying out the following calculations. The heat capacity of the cooling water can be taken as 4.18 kJ kg^- 1 o C^- 1. Determine the mean temperature difference with the original coil.