TLS Online TPP Program

#Question id: 1674


Which of the following statements is TRUE of receptor editing?

#Section 2: General Biology
  1. Has been described for antibody but not TCR

  2. Is associated with reexpression of RAG-1 in germinal centers

  3. Can involve V genes which are 3′ of the initially selected V gene

  4. Involves the S (switch) sequences

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TLS Online TPP Program

#Question id: 1090

#Section 3: Genetics, Cellular and Molecular Biology

Binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of ions on opposite sides of the membrane?

TLS Online TPP Program

#Question id: 14295

#Section 5: Bioprocess Engineering and Process Biotechnology

Pseudomonas methylotrophus is used to produce single-cell protein from methanol in a 1000 m3 pressure-cycle airlift fermenter. The biomass yield from substrate is 0.41 g g- 1, KS is 0.7 mg l- 1, and the maximum specific growth rate is 0.44 h- 1. The medium contains 4% (w/v) methanol. A substrate conversion of 98% is desirable. The reactor may be operated either in batch or continuous mode. If operated in batch, an inoculum of 0.01% (w/v) is used and the downtime between batches is 20 h. If operated continuously, a downtime of 25 d is expected per year. Neglecting maintenance requirements, compare the annual biomass production from batch and continuous reactors?

                             _________________

TLS Online TPP Program

#Question id: 15756

#Section 6: Plant, Animal and Microbial Biotechnology

Synthetic seeds are produced by the encapsulation of somatic embryos with ___________.

TLS Online TPP Program

#Question id: 16029

#Section 6: Plant, Animal and Microbial Biotechnology

Which of the following is not a source of energy in active muscle cells?

TLS Online TPP Program

#Question id: 14362

#Section 5: Bioprocess Engineering and Process Biotechnology

An experiment requires the use of 5 x 107 units of enzyme. The price for the enzyme is quoted for katal amounts. Allowing for a 20% excess for wastage, pipetting, and so forth, what approximate round number of katals of enzyme would you purchase?