Downstream Processing Mid - I, September - 2014

1.No cell wall for ____________cells.
  • Yeast
  • Plant
  • animal
  • bacteria
Answer: C
2.Rate of filtration is
  • dv/dt
  • 1/A dv/dt
  • dv/dA
  • 1/A dv/dp
Answer: B
3.Suspension of solids in a liquid settles down slowly under the influence of gravity this is _______________
  • Centrifugation
  • filtration
  • Sedimentation
  • flowlation
Answer: C
4.Vanthoff’s equations is given by
  • Π=RTC
  • π=RT
  • π=R
  • π=RC
Answer: A
5.The passage of these waves in a liquid medium indicates compression and rarefaction
  • Suspensonic
  • Ultrasonic
  • X-rays
  • UV rays
Answer: B
6.These are in activated by alkali treatment
  • Proteases
  • Lipases
  • Mannases
  • Strach
Answer: A
7.Examples of detergents used in cell wall disruption is
  • SAS
  • SDS
  • EDTA
  • Subtilisin
Answer: B
8.Pressure is the driving force for which method
  • Microfiltration
  • dialysis
  • electrodualysis
  • none of the above
Answer: A
9.Mixture of Glucanase, Mannase, Protease are required for lysis of
  • Bacteria
  • Plant
  • yeast
  • Animal
Answer: C
10.Viscosity increases with increasing shear stress in _____________fluids
  • Newtonian
  • Dilatants
  • Bingham
  • Pseudoplastic
Answer: B
11.Most of high value low volume products are manufactured under _________________as per the requirements of national regulatory authorities under suboptimal conditions.
Answer: Good manufacturing practice
12.The separation of solid from a suspension in the liquid by gravity settling is called as____________
Answer: Sedimentation
13.Equivalent time value are determined in centrifuge by _________________tester
Answer: Gyro
14.The porosity of the cake can be increase by the addition of__________________
Answer: Filter aids
15.In dialysis separation the driving force is___________________
Answer: Concentration
16.__________________is widely used in continuous filtration.
Answer: Rotary vacuum filter
17._________________incorporates a number of leaves each consistency of a metal frame work of solved plates covered with a wire mesh.
Answer: Pressure leaf filter
18.Retention coefficient of membrane (R) ______________________
Answer: Cm-Cp/Cm
19.Partition coefficient is the ratio of ______________________
Answer: Solute concentration in the organic phase to that in the aqueous phase
20.The flux through the membrane decreases slowly with time in all the membrane processes is called as__________________
Answer: Fouling