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  • Question
  • The maximum desirable limit (BIS of mercury in the drinking water is


  • Options
  • A. 0.05 mg/l
  • B. 0.9 mg/l
  • C. 0.1 mg/l
  • D. 0.001 mg/l

  • Correct Answer
  • 0.001 mg/l 


  • More questions

    • 1. To measure the extent to which the reaction rate is lowered because of resistance to mass transfer, the effectiveness factor of an immobilized enzyme, ? can be defined as

    • Options
    • A. reaction rate/rate if not slowed by diffusion
    • B. rate if not slowed by diffusion/ reaction rate
    • C. actual reaction rate/ rate if not slowed by diffusion
    • D. rate if not slowed by diffusion/ actual reaction rate
    • Discuss
    • 2. The immobilized enzyme produced by micro encapsulation technique provides

    • Options
    • A. an extremely large surface area
    • B. smaller surface area
    • C. high amount of solvent
    • D. relatively smaller surface area
    • Discuss
    • 3. Which of the statement is true for continuous reactor at steady state?

    • Options
    • A. The rates of biomass, substrate and product concentrations are zero
    • B. Biomass, substrate and product concentrations are zero
    • C. Biomass, substrate and product concentrations do not change with time
    • D. Biomass, substrate and product concentrations change with time
    • Discuss
    • 4. Start up expenses in a fermentation industry varies from

    • Options
    • A. 0-5% of the capital cost
    • B. 10-15% of the capital cost
    • C. 5-10% of the capital cost
    • D. 15-20% of the capital cost
    • Discuss
    • 5. Given an enzyme with a Km = 10m M and Vmax = 100 m mol/min. If [S] = 100 m M, which of the following will be true?

    • Options
    • A. A 10 fold increase in Vmax would increase velocity 10 fold y
    • B. A 10 fold decrease in Km would increase velocity
    • C. Both (a) and (b)
    • D. A 10 fold increase in Vmax would decrease velocity 20 fold
    • Discuss
    • 6. During fermentation, the saturation concentration of oxygen was reduced from 7 ppm. to 1 ppm. Which one of the following conclusions can be drawn?

    • Options
    • A. Microbial growth is oxygen limited since the oxygen concentration is lesser than the saturation concentration
    • B. Microbial growth is not oxygen limited since the oxygen concentration is lesser than the saturation concentration
    • C. Experimental error leads to the reduction
    • D. No conclusion can be drawn
    • Discuss
    • 7. Power consumption by agitation is

    • Options
    • A. a function of physical properties
    • B. a function of operating conditions
    • C. a function of vessel and impeller geometry
    • D. all of the above
    • Discuss
    • 8. The rate equation in non-competitive inhibition based on Michaelis Menten equation is given by

    • Options
    • A. rmaxS/(Km + S)(1+I/Ki)
    • B. rmaxE/(Km (1+I/Ki)+S))
    • C. VmaxS/(Km + S)(1+I/Ki)
    • D. rmaxS/Km
    • Discuss
    • 9. The rate equation in competitive inhibition based on Michaelis Menten equation is given by

    • Options
    • A. rmaxS/(Km (1+I/Ki)+S))
    • B. rmaxE/(Km (1+I/Ki)+S))
    • C. rmaxI/(Km (1+I/Ki)+S))
    • D. rmaxS/(Km (1+I/Ki))
    • Discuss
    • 10. Which of the following is best described as secondary metabolite?

    • Options
    • A. Acetic acid produced from the oxidation of ethanol
    • B. Ethanol from the fermentation of glucose
    • C. Penicillin
    • D. Citric acid from the partial oxidation of glucose
    • Discuss


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