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Q.65 Consider the equation V = aS /  b + S + S2/c Given a = 4, b = 1 and c = 9, the positive value of S at […]

Q.64 The value of determinant A given below is __________. A = 5 16 81 0 2 2 0 0 16   V =aS/b + S + S2/c Final Answer: […]

Q.63  d2y/dx2 − y = 0. The initial conditions for this second order homogeneous differential equation are: y(0) = 1    and  dy/dx = 3 at x = 0 The […]

Q.62 An enzyme is immobilized on the surface of a non-porous spherical particle of 2 mm diameter. The immobilized enzyme is suspended in a solution having bulk substrate concentration of […]

Q.61 A protein is to be purified using ion-exchange column chromatography. The relationship between HETP (Height Equivalent to Theoretical Plate) and the linear liquid velocity of mobile phase is given […]

Q.60 An enzyme converts substrate A to product B. At a given liquid feed stream of flow rate 25 L·min−1 and feed substrate concentration of 2 mol·L−1, the volume of […]

Q.59 A bioreactor is scaled up based on equal impeller tip speed. Consider the following parameters for small and large bioreactors: Parameters Small Bioreactor Large Bioreactor Impeller speed N1 N2 […]

Q.58 Decimal reduction time of bacterial spores is 23 min at 121 °C and the death kinetics follow first order. One liter of medium containing 105 spores per mL was sterilized […]

Q.57 Saccharomyces cerevisiae is cultured in a chemostat (continuous fermentation) at a dilution rate of 0.5 h−1. The feed substrate concentration is 10 g·L−1. The biomass concentration in the chemostat […]

Q.56 The empirical formula for biomass of an unknown organism is CH1.8O0.5N0.2. To grow this organism, ethanol (C2H5OH) and ammonia are used as carbon and nitrogen sources, respectively. Assume no […]