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Home Microbiology Poultry, Egg and Meat Comments

  • Question
  • Black rots in eggs is most commonly caused by


  • Options
  • A. species of Proteus
  • B. species of Micrococcus or Bacillus
  • C. molds or yeasts
  • D. all of these

  • Correct Answer
  • species of Proteus 


  • Poultry, Egg and Meat problems


    Search Results


    • 1. Bacterial ropiness in milk is caused by

    • Options
    • A. slimy capsular material from the cells usually gums or mucins
    • B. slimy capsular material from the cells usually proteins
    • C. slimy capsular material from the cells usually lipids
    • D. all of the above
    • Discuss
    • 2. The acidity may be described as "aromatic" when

    • Options
    • A. Lactic streptococci and aroma forming Leuconostoc species are growing together
    • B. Streptococcus lactis and other lactis are growing together
    • C. appreciable amounts of volatile fatty acids are produced by Coliform bacteria
    • D. all of the above
    • Discuss
    • 3. Non bacterial ropiness or sliminess in milk and milk products may be due to the

    • Options
    • A. stringiness caused by mastitis and in particular by fibrin and leucocytes from the cow's blood.
    • B. sliminess resulting from the thickness of the cream
    • C. stringiness due to thin films of casein or lactalbumin during cooling
    • D. all of the above
    • Discuss
    • 4. 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
    • 5. 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
    • 6. Which of the following is recommended for the improvement in flavor during ageing of beef under controlled conditions?

    • Options
    • A. Thamnidium
    • B. Rhizopus
    • C. T. elegans
    • D. M. mucedo
    • Discuss
    • 7. The spoilage of eggs by fungi goes through stages of mold growth that give the defects their names. Very early mold growth is termed

    • Options
    • A. pin-spot molding
    • B. fungal rotting
    • C. superficial fungal spoilage
    • D. any of these
    • Discuss
    • 8. The greening of sausage may appear as a green ring not far from the casing, a green core, or a green surface. The cause of greening is the production of hydrogen peroxide by

    • Options
    • A. hetero-fermentative species
    • B. catalase negative bacteria
    • C. both (a) and (b)
    • D. none of these
    • Discuss
    • 9. Green rots in eggs is chiefly caused by

    • Options
    • A. Pseudomonas fluorescens
    • B. Micrococcus or Bacillus species
    • C. Molds or yeasts
    • D. all of the above
    • Discuss
    • 10. White spot in meat is formed due to presence of

    • Options
    • A. P. expansum
    • B. Sporotrichum carnis
    • C. both (a) and (b)
    • D. P. oxalicum
    • Discuss


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