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Home ‣ Microbiology ‣ Heated Canned Foods See What Others Are Saying!
  • Question

  • Flat sour spoilage of acid foods is caused by


  • Options
  • A. B. coagulans
  • B. B. pepo
  • C. both (a) and (b)
  • D. B. stearothermophillus

  • Correct Answer
  • B. coagulans  

    • More questions

    • 1. The bacteria which produce(s) ?-galactosidase is/are

    • Options
    • A. Citrobacter
    • B. Enterohacter
    • C. Serratia
    • D. all of these
      • Discuss
    • 2. Spirochaetes exhibit

    • Options
    • A. corkscrew-like rotatory movement
    • B. flexion and extension motility
    • C. translatory motion
    • D. all of the above
      • Discuss
    • 3. Medusa head appearance of the colonies may be due to

    • Options
    • A. Bacillus anthracis
    • B. Proteus mirabilis
    • C. Clostridium tetani
    • D. Pseudomonas aeruginosa
      • Discuss
    • 4. Which of the following biochemical reaction is characteristic of Pseudomonas aeruginosa?

    • Options
    • A. Production of pyocyanin
    • B. Oxidative utilization of glucose
    • C. Oxidase production
    • D. All of these
      • Discuss
    • 5. Gram staining was introduced by

    • Options
    • A. Christian gram
    • B. Alfred Gram
    • C. Robertcook
    • D. Louis Pasteur
      • Discuss
    • 6. Agglutination test for Brucella mainly identifies which class of antibodies?

    • Options
    • A. IgG
    • B. IgM
    • C. IgA
    • D. IgE
      • Discuss
    • 7. The kelps are algae found in

    • Options
    • A. chlorophyta
    • B. chrysophyta
    • C. phaeophyta
    • D. pyrrophyta
      • Discuss
    • 8. Viropexis takes place in the phagocytic vacuoles and is due to the action of enzymes

    • Options
    • A. DNA gyrase
    • B. lysosomal protease
    • C. lysosomal lipase
    • D. all of these
      • Discuss
    • 9. Bacteriochlorophyll differs from chlorophyll in what way?

    • Options
    • A. The chelated metal in bacteriochlorophyll is not Mg
    • B. There are chemical differences between the two chlorophyll in their side (R) groups
    • C. They have different absorption spectra
    • D. Both (b) and (c)
      • Discuss
    • 10. Important example(s) of enriched medium/media is/ are

    • Options
    • A. Loeffler's serum slope
    • B. Bordet-gengou medium
    • C. Blood agar
    • D. All of these
      • Discuss

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