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- Question
Most spoilage bacteria grow at
Options- A. acidic pH
- B. alkaline pH
- C. neutral pH
- D. any of the pH
- Correct Answer
- neutral pH
- 1. Which of the following acid will have higher bacteriostatic effect at a given pH?
Options- A. Acetic acid
- B. Tartaric acid
- C. Citric acid
- D. Maleic acid Discuss
- 2. Which of the following is not true for the thermal resistance of the bacterial cells?
Options- A. Cocci are usually more resistant than rods
- B. Higher the optimal and maximal temperatures for growth, higher the resistance
- C. Bacteria that clump considerably or form capsules are difficult to kill
- D. Cells low in lipid content are harder to kill than other cells Discuss
- 3. Suspected colonies of Staphylococcus aureus when grown on Baird-Parker medium shall show
Options- A. coagulase activity
- B. protease activity
- C. catalase activity
- D. none of these Discuss
- 4. A dense bacterial population caught in a tangled web of fibers sticking to a surface describes
Options- A. coagulation
- B. a biodisc
- C. a biofilm
- D. the membrane filter technique Discuss
- 5. Which is not a form of biomass energy?
Options- A. Incineration of solid waste
- B. Composting to produce methane
- C. Ethanol and methanol production for auto fuel
- D. Photovoltaic production of hydrogen Discuss
- 6. The microbiological examination of coliform bacteria in foods preferably use
Options- A. MacConkey broth
- B. violet Red Bile agar
- C. eosine Methylene blue agar
- D. all of these Discuss
- 7. The different ACC's between food categories reflect the
Options- A. expected level of contamination of the raw material
- B. potential for microbial growth during storage
- C. potential shelf life
- D. all of the above Discuss
- 8. NaCl can act as
Options- A. antagonist at optimal concentrations
- B. synergistically if added in excess of optimum level
- C. Both (a) and (b)
- D. None of the above Discuss
- 9. Water activity can act as
Options- A. an intrinsic factor determining the likelihood of microbial proliferation
- B. a processing factor
- C. an extrinsic factor
- D. all of the above Discuss
- 10. Enumeration of microorganism refers to
Options- A. either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar, or non-selective plate, depending on the test
- B. either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar
- C. non-selective plating, depending on the test
- D. none of the above Discuss
Microbiology of Foods problems
Search Results
Correct Answer: Acetic acid
Correct Answer: Cells low in lipid content are harder to kill than other cells
Correct Answer: coagulase activity
Correct Answer: a biofilm
Correct Answer: Photovoltaic production of hydrogen
Correct Answer: all of these
Correct Answer: all of the above
Correct Answer: Both (a) and (b)
Correct Answer: all of the above
Correct Answer: either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar, or non-selective plate, depending on the test
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