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TLS Online TPP Program

#Question id: 3907

Which of the following is true about transcription?

#Section 3: Genetics, Cellular and Molecular Biology

  1. Promoters are regions of DNA which serve as transcription initiation sites.

  2. Initiation is the rate-limiting step in transcription.

  3. Each gene, in eukaryotic cells, usually has its own promoter.

  4. All of the above

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TLS Online TPP Program

#Question id: 245

#Section 2: General Biology

Adenylate and AMP each contain ________ phosphate groups.
TLS Online TPP Program

#Question id: 13057

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Precision will be reduced, but yield will be increased
Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.
How primer concentration leads to decrease in PCR efficiency?
TLS Online TPP Program

#Question id: 3748

#Section 3: Genetics, Cellular and Molecular Biology

How are the BRCA proteins and their genes implicated in breast cancer?
TLS Online TPP Program

#Question id: 14272

#Section 5: Bioprocess Engineering and Process Biotechnology

Penicillin is produced by P. chrysogenum in a fed-batch culture with the intermittent addition of glucose solution to the culture medium. The initial culture volume at quasi-steady state is V0 = 500 l, and glucose-containing nutrient solution is added with a flow rate of F = 50 l/h. Glucose concentration in the feed solution and initial cell concentration are S0 = 300 g/l and X0 = 20 g/l, respectively. The kinetic and yield coefficients of the organism are mm = 0.2 h-1 , KS = 0.5 g/l, and YX/S = 0.3 g dw/g glucose. If qP = 0.05 g product/g cells h and P0 = 0.1 g/l, determine the product concentration in the vessel at t = 10 h
TLS Online TPP Program

#Question id: 18693

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

which of the following is incorrect about protein structure comparison?