Q. Phase contrast microscope takes advantage of
✅ Correct Answer: (A)
Density of different parts of a cell
Basic Principles of Biotechnology MCQs | Page - 5
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Q. Measurement of KLa in a bioreactor can be carried out by sodium sulfite oxidation method, that is, based on the oxidation of sodium sulfite to sodium sulfate in the presence of a catalyst (Cu++ or Co++). In a typical experiment, a laboratory fermenter was filled with 5 liter of 0.5 M sodium sulfite solution containing 0.003 M Cu++ ions and the air was sparged in. After 10 min, the air flow was stopped and a 10 mL sample was taken and titrated. The concentration of sodium sulfite in the sample was found to be 0.20 M. The oxygen uptake rate for this aerated system will work out to be
✅ Correct Answer: (B)
0.008 g L-1 s-1
Q. In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The KLa for such a system will be (KLa = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)
✅ Correct Answer: (A)
(rX)
(C∗−C)
Q. Glycogen is a branched polymer of glucose It has
✅ Correct Answer: (C)
One reducing end and several non-reducing ends
Q. If the frequency of males affected with an X-linked recessive condition in a human population is 0.10 (one in ten), what will be the expected frequency of affected females?
✅ Correct Answer: (D)
0.01
Q. Power number also called Newton's number, is defined as a dimensionless parameter relating to
✅ Correct Answer: (C)
Energy required by the stirred reactors
Q. In the meiosis type cell division, chromatids segregates during
✅ Correct Answer: (D)
Anaphase II
Q. Binding of mannose 6-Phosphate to protein lead to its localization to
✅ Correct Answer: (A)
Lsosome
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