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- Question
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
- Correct Answer
- Both (a) and (b)
- 1. 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
- 2. 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
- 3. Most spoilage bacteria grow at
Options- A. acidic pH
- B. alkaline pH
- C. neutral pH
- D. any of the pH Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. 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 Discuss
- 10. 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
Microbiology of Foods problems
Search Results
Correct Answer: all of the above
Correct Answer: all of these
Correct Answer: neutral pH
Correct Answer: Acetic acid
Correct Answer: Cells low in lipid content are harder to kill than other cells
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
Correct Answer: incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
Correct Answer: Coxiella Burnetii
Correct Answer: All of these
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