TLS Online TPP Program

#Question id: 5845


Which of the following statements is false?  In vitro, the strand-exchange reaction:

#Section 3: Genetics, Cellular and Molecular Biology
  1. can include formation of a Holliday intermediate.

  2. is accompanied by ATP hydrolysis.

  3. may involve transient formation of a three- or four-stranded DNA complex.

  4. requires DNA polymerase.

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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: 631

#Section 2: General Biology

Two curves showing the rate versus substrate concentration are shown below for an enzyme-catalyzed reaction. One curve is for the reaction in the presence of substance X. The other curve is for data in the absence of substance X. Examine the curves and tell which statement below is false.

TLS Online TPP Program

#Question id: 27177

#Section 5: Bioprocess Engineering and Process Biotechnology

A strain of Azotobacter vinelandii is cultured in a 15-m³ stirred fermenter for alginate produc- tion. Under current operating conditions, kLa 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

TLS Online TPP Program

#Question id: 4327

#Section 3: Genetics, Cellular and Molecular Biology

What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?

TLS Online TPP Program

#Question id: 14676

#Section 4: Fundamentals of Biological Engineering

An industrial-strength drain cleaner contains 5.00 kg of water and 5.00 kg of NaOH. What are the mass (weight) fraction and mole fraction of each component in the drain cleaner?