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- Question
The time temperature combination for HTST paterurization of 71.1°C for 15 sec is selected on the basis of
Options- A. Coxiella Burnetii
- B. E. coli
- C. B. subtilis
- D. C. botulinum
- Correct Answer
- Coxiella Burnetii
- 1. Examination of the presence / absence of organisms refers to
Options- A. incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
- B. incubation of a food suspension in an enrichment medium followed by inoculation on to a non-selective medium.
- C. incubation of a food suspension in an enrichment medium
- D. none of the above Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. Which of the following is true about ISO 2002 method for Salmonella detection?
Options- A. Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn)
- B. Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth
- C. XLD is the first isolation medium rather than BGA
- D. All of these Discuss
- 7. Yeast and mould count determination requires-
Options- A. nutrient agar
- B. acidified potato glucose agar
- C. MacConkey agar
- D. violet Red Bile agar Discuss
- 8. A psychrophilic halophile would be a microbe that prefers
Options- A. cold temperatures and increased amounts of salt
- B. warm temperatures and increased amounts of pressure
- C. cold temperatures and the absence of oxygen
- D. warm temperatures and increased amounts of acid Discuss
- 9. Plate count of bacteria in foods generally use the plating medium consisting of
Options- A. peptone, yeast extract, glucose, sodium chloride, agar and distilled water
- B. yeast extract, glucose, sodium chloride, agar and distilled water
- C. peptone, glucose, sodium chloride, agar and distilled water
- D. peptone, yeast extract, glucose, sodium chloride and distilled water Discuss
- 10. What are the intrinsic factors for the microbial growth?
Options- A. pH
- B. Moisture
- C. Oxidation-Reduction Potential
- D. All of these Discuss
Microbiology of Foods problems
Search Results
Correct Answer: incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
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
Correct Answer: all of the above
Correct Answer: Both (a) and (b)
Correct Answer: all of the above
Correct Answer: All of these
Correct Answer: acidified potato glucose agar
Correct Answer: cold temperatures and increased amounts of salt
Correct Answer: peptone, yeast extract, glucose, sodium chloride, agar and distilled water
Correct Answer: All of these
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