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Home Biochemical Engineering Enzymes and Kinetics See What Others Are Saying!
  • Question
  • Which category of enzymes belongs to class two in the international classification?


  • Options
  • A. Hydrolases
  • B. Ligases
  • C. Transferases
  • D. Isomerase

  • Correct Answer
  • Transferases 


  • More questions

    • 1. When a culture of fermenting yeast becomes metabolically uncoupled, ethanol

    • Options
    • A. becomes a secondary metabolite
    • B. production becomes growth associated
    • C. production becomes non-growth associated
    • D. becomes a growth nutrient
    • Discuss
    • 2. Which of the following would be best described as a radial flow impeller?

    • Options
    • A. An impeller with blades pitched at 45° to the vertical
    • B. A Rushton turbine
    • C. Both (a) and (b)
    • D. An impeller which directs liquid flow towards the base of the reactor
    • Discuss
    • 3. A higher liquid height will lead to a higher gas hold up by which the oxygen transfer rate will be

    • Options
    • A. higher throughout the reactor
    • B. lower throughout the reactor
    • C. higher at the base of the reactor
    • D. lower at the base of the reactor
    • Discuss
    • 4. A fed-batch reactor initially contains 2 litre of medium. If it was fed at 1 litre per hour, then after 10 hours, the volume of the reactor will be

    • Options
    • A. 1 litre
    • B. 2 litre
    • C. 3 litre
    • D. 13 litre
    • Discuss
    • 5. Reynolds number for laminar flow over a plate should be less than

    • Options
    • A. 500 mm
    • B. 5 x 10-5
    • C. 5 x 105
    • D. 5 m
    • Discuss
    • 6. Acid used mostly for removal of milk stone is

    • Options
    • A. phosphoric acid
    • B. nitric acid
    • C. gluconic acid
    • D. tartaric acid
    • Discuss
    • 7. Which of the following describes the importance of the Kolmogorov eddy size in the biotechnology?

    • Options
    • A. The Kolmogorov eddy size is a measure of the smallest eddy size in a liquid
    • B. When the Kolmogorov eddy size become equivalent or smaller than the cell or particle diameter, then the cell or particle will become susceptible to shear damage
    • C. At the Kolmogorov eddy size, much of the energy of the originating eddy will be released
    • D. All of the above
    • Discuss
    • 8. In the death phase

    • Options
    • A. nutrients available for the cells are depleted and begin to die
    • B. the number of viable cells will increase
    • C. nutrients available for cells are replenished and start to multiply
    • D. none of the above
    • Discuss
    • 9. Which of the following is correct?

    • Options
    • A. The viscosity of liquids and gases decrease with increasing temperature
    • B. The viscosity of liquids and gases increase with increasing temperature
    • C. the viscosity of gases increases with increasing temperature, but decreases in liquids
    • D. the viscosity of gases decreases with increasing temperature, but decreases in liquids.
    • Discuss
    • 10. Soya off flavour removal may be achieved using

    • Options
    • A. di acetyl reductase
    • B. ?- amylase
    • C. aldehyde oxidase
    • D. protease
    • Discuss


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