In the name of ALLAH, the most beneficient, the most merciful

Industrial Biotechnology (BT604)

Multiple Choice Questions (MCQs)

Objective Questions

  1. The microorganisms associated with solid-substrate fermentations are those that tolerate relatively low water activity down to Aw values of around ________.

    1. 0.6
    2. 0.7
    3. 0.8
    4. 0.9
  2. Fermentation factors affecting DSP include ________.

    1. properties of microorganisms
    2. flocculation characteristics
    3. size and cell wall rigidity
    4. All of the given
  3. The physical and chemical properties of the product, alon with its concentration and location, are obviously key factors as they determine the initial separation steps and overall purification strategy.

    1. Physical property of product
    2. Chemical property of product
    3. Concentration of product
    4. All of the given
  4. Levels of dissolved O2 and CO2 are determined using ________.

    1. Testers
    2. Electrodes
    3. Tools
    4. Pipes
  5. Levels of dissolved O2 and CO2 are determined using ________ electrodes.

    1. O2 and CO2
    2. Fe
    3. Au
    4. Ag
  6. Solid-substrate fermentations have been used rarely for producing various fermented foods in ________.

    1. Asia
    2. Europe
    3. North America
    4. Europe North America both
  7. Broth conditioning techniques are mostly used in association with sedimentation and ________ for the separation of cells from liquid media.

    1. Centrifugation
    2. Vertexing
    3. freeze thawing
    4. None of the given
  8. Few anaerobic processes, such as silage production, require no mechanisms for ________.

    1. Anti-foaming
    2. Agitation or Aeration
    3. Product recovery
    4. PH
  9. As compared to yeasts ________ centrifuges are required for the separation of smaller microorganisms, such as bacteria.

    1. Small scale
    2. Slow speed
    3. Higher speed
    4. Advance
  10. ________, consisting of a glass or plastic column, into which the solid substrate is loosely packed, surrounded by a jacket that provides a means of temperature control.

    1. Column bioreactors
    2. Bed bioreactors
    3. Fluidized bioreactors
    4. Koji bioreactors