#Question id: 382
#SCPH05 I Biotechnology
The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?
#Question id: 14271
#SCPH05 I Biotechnology
Penicillin is produced by P. chrysogenum in a fed-batch culture with the intermittent addition of glucose solution to the culture medium. The initial culture volume at quasi-steady state is V0 = 500 l, and glucose-containing nutrient solution is added with a flow rate of F = 50 l/h. Glucose concentration in the feed solution and initial cell concentration are S0 = 300 g/l and X0 = 20 g/l, respectively. The kinetic and yield coefficients of the organism are mm = 0.2 h-1 , KS = 0.5 g/l, and YX/S = 0.3 g dw/g glucose. Determine the concentration of cells at quasi-steady state when t = 10 h.
#Question id: 2066
#I Life Science/ Life Sciences Group – I-V
Which of the following statements describes a characteristic feature of a carrier protein in a plasma membrane?
#Question id: 5529
#I Life Science/ Life Sciences Group – I-V
In humans, organogenesis in the embryo is basically accomplished by the end of which period of the pregnancy?
#Question id: 4127
#SCPH05 I Biotechnology
Which one of the following statements about ribosomes is true?