Tag: dbt jrf 2018

200. Which one of the following is NOT used for partition based bio-separation? 1. Solvent extraction 2. Electrodialysis 3. Salting out 4. Adsorption chromatography Introduction Bioseparation is a critical step […]

199. In anaerobic lactic acid fermentation by bacteria, glucose is partially oxidised to pyruvate followed by reduction to lactate: 1. for maintaining proton motive force 2. for cofactor balancing 3. […]

198. Sedimentation efficiency depends on the relative strength of : 1. Drag versus centrifugal force 2. Drag versus gravitational force 3. Gravitational versus centrifugal force 4. Gravitational versus electrostatic force […]

197. The driving force for mass transfer by molecular diffusion is the difference in 1. Potential energy 2. Vapour pressure 3. Gibbs free energy 4. Chemical potential Introduction: Mass transfer […]

196. A food product having water activity of 0.6 is exposed to conditions of 30°C and 70% R.H. This product will tend to ___________ 1. Gain moisture 2. Lose moisture […]

195. Two sucrose solutions ‘A’= 30g/100g and ‘B’= 60 g/100 g have to be mixed to prepare 1 kg of 50g/100g sugar syrup. The amounts of ‘A’ and ‘B’ solutions […]

194. A food package label displays composition of the food product in g/100g as: protein = 8g, fat= 20g, carbohydrate= 60g (of which sugar is 20g). The calorific value of […]

193. Two columns of 1 m and 2 m height and of equal diameter are packed with beads containing immobilized enzyme. Substrate was fed to these two columns at flow […]

192. In a batch microbial fermentation process the dissolved oxygen concentration (DOC) remains almost zero during growth. Which of the following methods will you use for the estimation of oxygen […]

189. In mammalian cell culture based monoclonal antibody production, perfusion culture is preferred over continuous stirred tank culture, because the process results in: 1. high volumetric productivity 2. high specific […]