Homozygous yellow and round seed was crossed with green and wrinkle seed plant. All F1 offspring having yellow and round seed plant were allowed to self fertilization. What is the proportional of F2 plant heterozygous for both characters?

#Question id: 4344

#Section 3: Genetics, Cellular and Molecular Biology

How does the transcription of structural genes in an inducible operon occur?

#Question id: 1094

#Section 3: Genetics, Cellular and Molecular Biology

Not all intercellular signals require transduction. Which one of the following signals would be processed without transduction?

#Question id: 3888

#Section 3: Genetics, Cellular and Molecular Biology

Which of these polymerases does not require a template?

#Question id: 4133

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statements about aminoacyl-tRNA synthetases is false?

#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