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TLS Online TPP Program

#Question id: 12727

Name the form of DNA which may be produced with a DNA sequence made up from alternating purine and pyrimidine nucleotides.

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology
  1. B form
  2. A form
  3. C form
  4. Z form
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TLS Online TPP Program

#Question id: 351

#Section 4: Fundamentals of Biological Engineering

 If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.
TLS Online TPP Program

#Question id: 16873

#General Aptitude

Ten years have passed ……… my grandmother died.
TLS Online TPP Program

#Question id: 27207

#Section 3: Genetics, Cellular and Molecular Biology

ATP is a
TLS Online TPP Program

#Question id: 27214

#Section 5: Bioprocess Engineering and Process Biotechnology

In PFR, concentration of reactant varies
TLS Online TPP Program

#Question id: 14248

#Section 5: Bioprocess Engineering and Process Biotechnology

A steam steriliser is used to sterilise liquid medium for fermentation. The initial concentration of contaminating organisms is 108 per litre. For design purposes, the final acceptable level of contamination is usually taken to be 10-3cells; this corresponds to a risk that one batch in a thousand will remain contaminated even after the sterilisation process is complete. For how long should 1 m3 medium be treated if the temperature is 140⁰C ________________.

        To be safe, assume that the contaminants present are spores of Bacillus stearothermophilus, one of the most heat-resistant microorganisms known. For these spores the activation energy for thermal death is 283 kJ gmo1-1 and the Arrhenius constant is 1036.2 s-1