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Home Biotechnology Vinegar and Citric Acid See What Others Are Saying!
  • Question
  • Vinegar is typically produced in fed batch reactors because


  • Options
  • A. a fed batch reactor can be used to maintain low acetic acid concentrations
  • B. a fed batch reactor can be used to maintain low ethanol concentrations
  • C. acetic acid bacteria tend to ferment at high ethanol concentrations
  • D. all of the above

  • Correct Answer
  • a fed batch reactor can be used to maintain low ethanol concentrations 


  • More questions

    • 1. Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential?

    • Options
    • A. Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
    • B. The rules governing oxidation and reduction apply only in vitro, and not in vivo
    • C. Electrons always go from reductants with high redox potentials to oxidants with low redox potentials
    • D. None of the above
    • Discuss
    • 2. Which of the following statements is false?

    • Options
    • A. Continuous variation produces a spread of variation within a population
    • B. Discontinuous variation is the result of genetics alone
    • C. Blood group is an example of discontinuous variation
    • D. Discontinuous variation is influenced by the environment
    • Discuss
    • 3. The intervention in the communication system of nematodes offer several possibilities of bio control. Which of the following(s) play(s) a very important role in the host recognition?

    • Options
    • A. Protein
    • B. Lipid
    • C. Carbohydrate moiety
    • D. Minerals
    • Discuss
    • 4. Which of the following changes occur during first phase of growth of Penicillium chrysogenum?

    • Options
    • A. Growth of mycelia occurs
    • B. Ammonia is liberated in the medium
    • C. Lactic acid present in the corn steep liquor is utilized at the maximum rate
    • D. All of the above
    • Discuss
    • 5. Bruise resistant tomatoes have been developed by the expression of antisense RNA against

    • Options
    • A. glycerol 1 phosphate acyl transferase
    • B. polygalactouranase
    • C. ACC deaminase
    • D. Sucrose phosphate synthase gene
    • Discuss
    • 6. In transgenic plants that have been manipulated to express patho-genesis-related (PR) proteins all the time it has been shown that

    • Options
    • A. these provide no protection at all against pathogens
    • B. expression of one PR protein provides high levels of protection against many pathogens
    • C. expression of two PR proteins provides some protection against a few pathogens
    • D. these proteins trigger the production of other antimicrobial defenses
    • Discuss
    • 7. Which of the following mutant/(s) has/have increased amount of lysine and/or methionine in corn seeds?

    • Options
    • A. Opaque-2
    • B. Sugary-1
    • C. Flory-2
    • D. All of these
    • Discuss
    • 8. Gypsum is beneficial for

    • Options
    • A. phosphorus enriched soil
    • B. water logged soil
    • C. alkaline soil
    • D. saline soil
    • Discuss
    • 9. What is the desirable sugar content of the grapes required for the wine production?

    • Options
    • A. 2-5%
    • B. 5-10%
    • C. 10-14%
    • D. 14-20%
    • Discuss
    • 10. Alegar is a type of vinegar produced from

    • Options
    • A. fruit juices
    • B. malted grain
    • C. ethanol
    • D. ale
    • Discuss


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