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Home Microbiology Milk and Milk Products Comments

  • Question
  • Pseudomonas nigrifaciens in mildly salted butter may cause


  • Options
  • A. black smudge
  • B. greenish areas
  • C. pink color
  • D. none of these

  • Correct Answer
  • black smudge 


  • Milk and Milk Products problems


    Search Results


    • 1. An alkaline reaction in milk is caused by the alkali formers bacteria as

    • Options
    • A. Pseudomonas fluorescens
    • B. A. viscolactis
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 2. Black mold rot is caused by

    • Options
    • A. A.flavus
    • B. A. niger
    • C. Trichoderma
    • D. Trichothecium roseum
    • Discuss
    • 3. The micro-organism which is present in both fresh and frozen juices is

    • Options
    • A. E. coli
    • B. Entereobacter aerogenes
    • C. P. chrysogenum
    • D. None of these
    • Discuss
    • 4. Species of __________ are predominant on thawing vegetables like sweet corn and peas when the temperature of thawing is fairly low.

    • Options
    • A. Streptococcus
    • B. Micrococcus
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 5. Watery soft rot is found mostly in

    • Options
    • A. fruits
    • B. vegetables
    • C. cereals
    • D. all of these
    • Discuss
    • 6. A yellow color in the creamy layer of milk may be caused by

    • Options
    • A. Pseudomonas synxantha
    • B. Pseudomonas syncyanea
    • C. both (a) and (b)
    • D. S. marcescens
    • Discuss
    • 7. The chief type of spoilage in sweetened condensed milk may be

    • Options
    • A. gas formation by sucrose fermenting yeasts
    • B. thickening caused by micrococci
    • C. mold colonies growing on the surface
    • D. all of the above
    • Discuss
    • 8. Fishiness in butter is caused by

    • Options
    • A. Aeromonas hydrophila
    • B. Pseudomonas synxantha
    • C. Pseudomonas syncyanea
    • D. none of these
    • Discuss
    • 9. A brown color in milk may result from

    • Options
    • A. Pseudomonas putrefaciens
    • B. the enzymatic oxidation of tyrosine by P. fluorescens
    • C. both (a) and (b)
    • D. S. marcescens
    • Discuss
    • 10. Acidophilus milk which is used for its therapeutic properties in intestinal disorders requires for its manufacture a pure culture of

    • Options
    • A. Lactobacillus bulgaricus
    • B. Streptococcus thermophilics
    • C. Lactobacillus acidophilus
    • D. None of the above
    • Discuss


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