In E. coli, which enzyme catalyzes the elongation of a new DNA strand in the 5' → 3' direction?

#Question id: 27045

#Section 4: Fundamentals of Biological Engineering

#Question id: 2066

#Section 2: General Biology

Which of the following statements describes a characteristic feature of a carrier protein in a plasma membrane?

#Question id: 1085

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statements about a G protein signaling pathway is true?

#Question id: 27220

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

#Question id: 14246

#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 80⁰C ________________.10^6

 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 10^36.2 s^-1