Discussion
Home ‣ Microbiology ‣ Heated Canned Foods See What Others Are Saying!
- Question
The canned acid foods such as pineapple, tomatoes and pears have been found spoiled by C. pasteurianum. Such spoilage is more likely when the pH of the food is
Options- A. >4.5
- B. <4.5
- C. >5.3
- D. <5.3
- Correct Answer
- >4.5
- 1. Which is most likely to be exposed on the surface of a gram-negative bacterium?
Options- A. Pore protein (porin)
- B. Protein involved in energy generation
- C. Lipoteichoic acid
- D. Phospholipids Discuss
- 2. All of the following are features of prokaryotes except
Options- A. nitrogen fixation
- B. photosynthesis
- C. sexual reproduction
- D. locomotion Discuss
- 3. High acid foods with a pH above 5.3 are especially subjected to
Options- A. flat sour spoilage
- B. putrefaction
- C. both (a) and (b)
- D. TA spoilage Discuss
- 4. The binomial name of a microbe is composed of
Options- A. its kingdom and genus names
- B. its genus name and a species modifier
- C. its family and class names
- D. its genus and species names Discuss
- 5. Induction of tolerance mechanism(s) is/are
Options- A. suppression
- B. clonal deletion
- C. clonal anergy
- D. all of these Discuss
- 6. Why high concentration of sugars are not employed in the fermentation medium?
Options- A. Calcium lactate is not produced
- B. Calcium lactate crystallizes from the medium and slows down the process of fermentation
- C. High sugar concentration itself crystallizes
- D. None of the above Discuss
- 7. A cluster of polar flagella is called
Options- A. lophotrichous
- B. amphitrichous
- C. monotrichous
- D. petritrichous Discuss
- 8. Which of the following chemotherapeutic agents may affect the growth of Campylobacter jejuni?
Options- A. Vacomycin
- B. Polymyxin
- C. Trimethoprim
- D. None of these Discuss
- 9. T-even phage binding to E. coli probably involves
Options- A. electrostatic interaction
- B. hydrophobic interaction
- C. covalent bonds
- D. all of these Discuss
- 10. Genetic variations are
Options- A. temporary
- B. influenced by the environment
- C. stable
- D. not heritable Discuss
More questions
Correct Answer: Pore protein (porin)
Correct Answer: sexual reproduction
Correct Answer: both (a) and (b)
Correct Answer: its genus name and a species modifier
Correct Answer: all of these
Correct Answer: Calcium lactate crystallizes from the medium and slows down the process of fermentation
Correct Answer: lophotrichous
Correct Answer: None of these
Correct Answer: electrostatic interaction
Correct Answer: stable
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