The growth of baker’s yeast (S. cerevisiae) on glucose may be simply described by the following equation:

In a batch reactor of volume 10^5 l, the final desired yeast concentration is 50 gdw/l. Using the above reaction stoichiometry. Determine the yield coefficient YX/O2 (biomass/oxygen)?

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#Question id: 583

#Section 2: General Biology

When there are two substrates in a reaction, the reaction is said to be second order if ________.

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#Question id: 2288

#Section 3: Genetics, Cellular and Molecular Biology

Proteins lacking a signal peptide sequence will probably found in

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#Question id: 5153

#General Aptitude

How many of the following numbers are divisible by 132 ?

264,396,462,792,968,2178,5184,6336

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#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

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#Question id: 1134

#Section 3: Genetics, Cellular and Molecular Biology

Arrange the following proteins in the proper order in which they become activated in the MAPK signaling pathway:

a. MAP kinase                         b. MEK           c. Ras              d. Raf              e. RTK