Agar

TLS Online TPP Program

#Question id: 13060

#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.

In blue white screening insertional activation of Beta-D-galactosidase will give rise to

TLS Online TPP Program

#Question id: 15462

#Section 4: Fundamentals of Biological Engineering

What is the enthalpy of 150 g formic acid at 70°C and 1 atm relative to 25°C  and 1 atm? (Cp for formic acid is 0.524 cal g^-1 °C^-1)

TLS Online TPP Program

#Question id: 2122

#Section 2: General Biology

The inner (plasma) membrane of E. coli is about 75% lipid and 25% protein by weight.  How many molecules of membrane lipid are there for each molecule of protein?  (Assume that the average protein is Mr 50,000 and the average lipid is 750.)

TLS Online TPP Program

#Question id: 2059

#Section 3: Genetics, Cellular and Molecular Biology

For a protein to be an integral membrane protein, it would have to be:

TLS Online TPP Program

#Question id: 3307

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following conditions is not necessarily be fulfilled to trigger natural selection