#Question id: 14245
#Section 5: Bioprocess Engineering and Process Biotechnology
Ethanol is produced by anaerobic fermentation of glucose by
Saccharomyces cerevisiae. For the particular strain of S. cerevisiae employed,
the maintenance coefficient is 0.18 kg kg- 1 h- 1, Yxs is
0.11 kg kg-1, YPX is 3.9 kg kg-1 and µmax is 0.4 h-1. It is decided to investigate the possibility
of using Zymomonas mobilis bacteria instead of yeast for making ethanol. Z.
mobilis is known to produce ethanol under anaerobic conditions using a
different metabolic pathway to that employed by yeast. Typical values of Yxs
are lower than for yeast at about 0.06 kg kg-1; on the other hand,
the maintenance coefficient is higher at 2.2 kg kg -1 h -1.
Ypx for Z. mobilis is 7.7 kg kg-l; µmax is 0.3 h- 1. Y’PS
is maximum and equal to the theoretical yield when there is zero growth and all
substrate entering the cell is used for maintenance activities. If ethanol is
the sole extracellular product of energy-yielding metabolism, calculate mp for yeast?
#Question id: 4141
#Section 3: Genetics, Cellular and Molecular Biology
Bacterial ribosomes:
#Question id: 3659
#Section 3: Genetics, Cellular and Molecular Biology
In eukaryotes, gap filling in BER involves predominantly DNA polymerase β whereas the longer gaps generated in NER are filled by:
#Question id: 2016
#Section 2: General Biology
Most newly emerging diseases, no matter how severe their effects on a population, human or otherwise, have which of the following in common?
#Question id: 3687
#Section 3: Genetics, Cellular and Molecular Biology
As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?