Biochemical Miscellaneous

Biochemical Miscellaneous

Easy Questions

Biochemical

Biochemical Miscellaneous
  1. The limiting factor in the production of large quantities of ethanol as bio-fuel is ​​








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    For ethanol commercial utilization we need high purity which leads to heavy downstream processing cost along with high percentage of ethanol cause dehydration to the microbial inoculums leading to toxicity to cell. ​

    Correct Option: D

    For ethanol commercial utilization we need high purity which leads to heavy downstream processing cost along with high percentage of ethanol cause dehydration to the microbial inoculums leading to toxicity to cell. ​

  1. If the fractional recovery at each step of unit operation is 0.8, the recovery after 4 steps will be








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    The recovery after four steps ​​​ 
    = (0.8)4 = 0.4096 ≃ 0.41

    Correct Option: C

    The recovery after four steps ​​​ 
    = (0.8)4 = 0.4096 ≃ 0.41

  1. Which of the following statements applies to the operation of a fed-batch process ? ​​








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    Fed Batch process is based on feeding of growth limiting nutrient substrate to a culture. This process is used to control repressive effects of the particular nutrient which at higher concentration inhibit the growth of the culture or product. ​

    Correct Option: D

    Fed Batch process is based on feeding of growth limiting nutrient substrate to a culture. This process is used to control repressive effects of the particular nutrient which at higher concentration inhibit the growth of the culture or product. ​

  1. In large-scale fermentation, the preferred method of sterilization
    sterilization is








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    Heat sterilization likely the steam sterilization is helpful in large scale production. ​

    Correct Option: D

    Heat sterilization likely the steam sterilization is helpful in large scale production. ​

  1. Which of the following is not true of aerobic digestion ? ​​








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    Organic ingredients intended for composting can alternatively be used to generate biogas through anaerobic digestion. Anaerobic digestion is fast overtaking composting in some parts of the world including central Europe as a primary means of downcycling waste organic matter.

    Correct Option: C

    Organic ingredients intended for composting can alternatively be used to generate biogas through anaerobic digestion. Anaerobic digestion is fast overtaking composting in some parts of the world including central Europe as a primary means of downcycling waste organic matter.