#Question id: 3357
#Section 3: Genetics, Cellular and Molecular Biology
Which of the following statements about speciation is NOT true?
#Question id: 10776
#Section 6: Plant, Animal and Microbial Biotechnology
pyrethroids that occur in the leaves and flowers of Chrysanthemum species show very striking insecticidal activity. Pyrethroids are________
#Question id: 14166
#Section 4: Fundamentals of Biological Engineering
Stoichiometric equations are used to represent growth of
microorganisms provided a ' molecular formula' for the cells is available. The
molecular formula for biomass is obtained by measuring the amounts of C, N, H,
O and other elements in cells. For a particular bacterial strain, the molecular
formula was determined to be C4.4H7.30 1.2N0.86 . These bacteria are grown
under aerobic conditions with hexadecane (C16H34) as substrate. The reaction
equation describing growth is:
You have been put in charge of a small fermenter for growing the bacteria and aim to produce 2.5 kg of cells for inoculation of a pilot-scale reactor. What minimum amount of hexadecane substrate must be contained in your culture medium?
#Question id: 318
#Section 2: General Biology
Attractions of oppositely charged functional groups of proteins are sometimes called ________.
#Question id: 14241
#Section 5: Bioprocess Engineering and Process Biotechnology
Yeast cells are to be separated from a fermentation broth.
Assume that the cells are spherical with diameter 5 µm and density 1.06 g cm-3.
The viscosity of the culture broth is 1.36 x 10-3 N s m-2.
At the temperature of separation, the density of the suspending fluid is 0.997
g cm-3. 500 litres broth must be treated every hour. Specify Σ
for a suitably-sized disc-stack centrifuge
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