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TLS Online TPP Program

#Question id: 15790

During the lag phase of Bacterial growth, which of the following statements are correct?

#Section 5: Bioprocess Engineering and Process Biotechnology
  1. Cell mass may increase a little, without an increase in cell number density.
  2. Microorganisms reorganize their molecular constituents when they are transferred to a new medium
  3. Low concentration of some nutrients and growth factors may also cause a long lag phase.
  4. The age of the inoculum culture has no effect on the length of lag phase
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TLS Online TPP Program

#Question id: 27354

#Section 3: Genetics, Cellular and Molecular Biology

What does the cas9 protein do?
TLS Online TPP Program

#Question id: 27355

#Section 3: Genetics, Cellular and Molecular Biology

How does the guide RNA help the cell know where to cut the DNA?
TLS Online TPP Program

#Question id: 27356

#Section 3: Genetics, Cellular and Molecular Biology

What is the role of the guide RNA?
TLS Online TPP Program

#Question id: 27359

#Section 5: Bioprocess Engineering and Process Biotechnology

A double reciprocal plot was created from the specific growth rate and limiting-substrate concentration data obtained from a chemostat experiment. A linear regression gave values of 1.25 h and 100 mg hL-1 for the intercept and slope, respectively.
(a) The respective values of the Monod kinetic constants μm (h-1) and K. (mg L-¹) are as follows:
TLS Online TPP Program

#Question id: 27360

#Section 5: Bioprocess Engineering and Process Biotechnology

The same culture (with the m and K, values as computed above) is cultivated in a 10 L chemostat being operated with a 50 mL min-1 sterile feed containing 50 g L-1 of substrate. Assuming an overall yield coefficient of 0.3 (g- DCW) (g- substrate), the respective values of the outlet biomass and substrate concentrations are
TLS Online TPP Program

#Question id: 27361

#Section 5: Bioprocess Engineering and Process Biotechnology

A continuous stirred tank bioreactor produces 48 kg lysine.day-1. If the volumetric productivity is 2 g.l-1.h-1, the volume of the reactor is: