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  • Question
  • Pseudomonas syncyanea produces a


  • Options
  • A. bluish gray to brownish color in milk in its pure form
  • B. brownish color to bluish gray in milk in its pure form
  • C. gray to brownish color in milk
  • D. yellow color in milk

  • Correct Answer
  • bluish gray to brownish color in milk in its pure form 


  • Milk and Milk Products problems


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    • 1. Which of the following species of Clostridium is responsible for formation of dark green to black colours in cheese?

    • Options
    • A. Clostridium tyrobutyricum
    • B. Clostridium sporogenes
    • C. Clostridium herbarum
    • D. None of these
    • Discuss
    • 2. Cheese cancer of Swiss and similar cheese is caused by

    • Options
    • A. Oospora Crustacea
    • B. Oospora caseovorans
    • C. Oospora aurianticum
    • D. none of these
    • Discuss
    • 3. Swelling of the can is caused primarily by

    • Options
    • A. gas forming, anaerobic spore formers
    • B. gas forming, aerobic spore formers
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 4. Certain strains of Streptococcus lactis var. maltigenes may produce

    • Options
    • A. bitter flavor
    • B. acid flavor
    • C. burnt or caramel flavor
    • D. none of these
    • Discuss
    • 5. Esters like flavors in butter are resulted from the action of

    • Options
    • A. P. mephitica
    • B. Aeromonas hydrophila
    • C. P. fragi
    • D. Pseudomonas synxantha
    • Discuss
    • 6. Bulgarian butter milk is made with the help of

    • Options
    • A. Lactobacillus bulgaricus
    • B. Streptococcus lactis
    • C. Streptococcus thermophilus
    • D. S. cremoris
    • Discuss
    • 7. Surface taint in butter which is blamed on Pseudomonas putrefaciens is also called as

    • Options
    • A. rabbito
    • B. putridity
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 8. The yoghurt is made from

    • Options
    • A. Lactobacillus bulgaricus
    • B. Streptococcus thermophilus
    • C. S. cremoris
    • D. mixed culture of (a) and (b)
    • Discuss
    • 9. Ropiness caused by Enterobacter usually is

    • Options
    • A. worse at the middle of the milk
    • B. worse at the bottom of the milk
    • C. worse near the top of the milk
    • D. all of these
    • Discuss
    • 10. Cheese with too low an acidity because of the addition of cream or the failure of the starter often is made gelatinous or slimy by

    • Options
    • A. Pseudomonas
    • B. P. fragi
    • C. Alcaligenes metalcaligenes
    • D. all of these
    • Discuss


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