⚗️ Biochemical Engineering Solved MCQs with Answers

Practice 513 approved ⚗️ Biochemical Engineering questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

513 solved MCQs

From the following sanitizers which one comes under category of surface active agents?Answer: Teepol The purest form of naturally occurring water isAnswer: Rain water Calgon is used for removal ofAnswer: Permanent hardness of water The water being used in dairy industry should contain not more thanAnswer: 5 proteolytic and/or lipolytic organisms per ml The activated sludge process consists of returning a portion of the clarifierAnswer: Influent water entering the reactor The activated sludge process is sometime referred asAnswer: Fluid bed biological oxidation system BOD stands forAnswer: Biochemical oxygen demand When temporary hard water is boiled, one of the substances formed isAnswer: Carbon dioxide Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated asAnswer: Insoluble zeolites The methods used for biological treatment areAnswer: All of these The methods used for biological treatment areAnswer: All of these Both temporary and permanent hardness of water can be removed byAnswer: Distillation Coliform bacteria in water is an indication of the presence ofAnswer: Human feces Concentration polarization can be reduced further byAnswer: All of these A system which require less solvent and produces a more concentrated extract phase, is desired with aAnswer: Large distribution coefficients The efficiency of cell disruption in a bead mill depends on theAnswer: All of these A common filter medium is the cloth filter generally made ofAnswer: All of these An ion exchange resin is composed ofAnswer: All of these Maintenance cost varies fromAnswer: 4-8% of the capital cost The optimum wet solid content for the cell suspension for a bead mill is typically somewhere betweenAnswer: 30-60% by volume Filtration leaf test results indicate that the filtration rate of a protein product is 100 dry lbs/(ft² hr). What size production filter would be required to obtain 100 dry lbs of filter cake/hr?Answer: 1.54 ft² Selectivity can be expressed asAnswer: Ratio of the distribution coefficients in different solute The disk centrifuge is the type of centrifuge used most often for bio separations due to itsAnswer: Lesser cost The effectiveness of a solvent can be measured by theAnswer: Both (a) and (b) The stage wise operation of adsorption is calledAnswer: Contact filtration Which of the following is not the physical method for the cells rupturing?Answer: Enzymatic digestion Conventional adsorption is aAnswer: Either reversible or irreversible If the solute passes through membrane freely, the the rejection coefficient (s) isAnswer: 0 If the membrane rejects all solute, the rejection coefficient (s) isAnswer: 1 In antibiotic manufacturing processes, the fermentation time ranges fromAnswer: 4-5 weeks