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Home Biochemical Engineering Fermentation Reactors See What Others Are Saying!
  • Question
  • A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called __________ culture system.


  • Options
  • A. continuous
  • B. batch
  • C. fed-batch
  • D. semi continuous

  • Correct Answer
  • continuous 


  • More questions

    • 1. The viscosity of a fluid increases with the length of time that it is being mixed. This fluid would be best described as being

    • Options
    • A. newtonian
    • B. rheopectic
    • C. viscoelastic
    • D. thixotropic
    • Discuss
    • 2. Which of the following metallic ion is there in ascorbic acid oxidase?

    • Options
    • A. Mg
    • B. Fe
    • C. Cu
    • D. Mn
    • Discuss
    • 3. The collection efficiency by impaction increases with

    • Options
    • A. increasing particle diameter
    • B. increasing air flow velocity
    • C. both (a) and (b)
    • D. increasing particle size
    • Discuss
    • 4. The specific death rate of an organism can be expressed as

    • Options
    • A. ln 2/D
    • B. D/ln2
    • C. D.ln2
    • D. 2.0.3/ln2
    • Discuss
    • 5. Bioreactors, where vortex is formed, another dimensionless number, __________ is useful.

    • Options
    • A. Stanton
    • B. Rayleigh
    • C. Bond
    • D. Froude
    • Discuss
    • 6. Which of the following is considered as a disadvantage to the adsorption method of immobilization?

    • Options
    • A. It is possible to separate and purify the enzymes while being immobilized
    • B. The enzymes are not usually deactivated by adsorption
    • C. The adsorption is a reversible process
    • D. State of immobilization is very sensitive to solution pH, ionic strength and temperature
    • Discuss
    • 7. Which of the following statements is not true?

    • Options
    • A. Enzymes are proteins that bind to specific substrates and increase the velocity of reactions involving those substrates
    • B. Enzymes function by overcoming the activation energy barrier of a reaction
    • C. Enzymes make thermodynamically favorable reactions to proceed; they cannot make unfavorable reactions to occur
    • D. Enzymes only function when they are in intact cells
    • Discuss
    • 8. A viscoelastic fluid is one in which the viscosity

    • Options
    • A. is constant regardless of the stirrer speed or mixing time
    • B. changes during mixing but returns to its original state after mixing
    • C. increases with increasing stirrer speed
    • D. decreases with increasing stirrer speed
    • Discuss
    • 9. An allosteric inhibitor of an enzyme usually

    • Options
    • A. participates in feedback regulation
    • B. denatures the enzyme
    • C. is a hydrophobic compound
    • D. causes the enzyme to work faster
    • Discuss
    • 10. Juice clarification extraction is facilitated by using

    • Options
    • A. cellulases
    • B. amylase
    • C. inulinase
    • D. lactase
    • Discuss


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