Discussion
Home ‣ Microbiology ‣ Microbial Recombination and Gene Transfer See What Others Are Saying!
- Question
Which of the following type of recombination does not require homologous sequences and is utilized by mobile genetic elements that move about chromosomes?
Options- A. Mutagenic recombimation
- B. Site-specific recombination
- C. Replicative recombination
- D. General recombination
- Correct Answer
- Replicative recombination
- 1. The lowest temperature that kills all microorganisms in a liquid suspension in 10 minutes is known as the
Options- A. decimal reduction time
- B. thermal death point
- C. thermal death temperature
- D. thermal death time Discuss
- 2. In chilled shrimp __________ is chiefly responsible for spoilage.
Options- A. Achromobacter
- B. Pseudomonas
- C. Micrococcus or Bacillus species
- D. Molds or yeasts Discuss
- 3. Which of the following type of recombination does not require homologous sequences and is important for the integration of viral genomes into bacterial chromosomes?
Options- A. Mutagenic recombimation
- B. Site-specific recombination
- C. Replicative recombination
- D. General recombination Discuss
- 4. Sarcina sickness of beer is caused by
Options- A. Saccharomyces cerevisiae
- B. Pedicoccus cerevisiae
- C. S. carlsbergensis
- D. Zygomonas anaeroium Discuss
- 5. Which of the following (s) is/are the major spoilage of soft drinks from the marked growth of yeasts and bacteria?
Options- A. Cloudiness and ropiness
- B. Flat sour spoilage
- C. Superficial fungal spoilage
- D. Pin-spot molding Discuss
- 6. Which of these cytokines is also known under the name cachectin?
Options- A. Interferon gamma
- B. Interleukin 2
- C. Tumor necrosis factor (TNF)
- D. None of the above Discuss
- 7. Weil-Felix reaction is based on sharing of antigens between
Options- A. sheep RBCs and EB virus
- B. mycoplasma and human O group RBCs
- C. rickettsial antigens and antigens of certain strains of Proteus
- D. none of these Discuss
- 8. The growth of Streptomyces on straw or elsewhere near the egg may produce
Options- A. musty or earthy flavors
- B. hay odour
- C. fishy flavor
- D. cabbage-water flavor Discuss
- 9. Which of the following statement is not correct?
Options- A. The use of 25-40°C temperatures allows the biogas production to be more stable
- B. The use of 25-40°C temperatures does not destroy potentially harmful bacteria
- C. The use of 25-40°C temperatures destroys potentially harmful bacteria
- D. None of the above Discuss
- 10. Primary differences between cilia and flagella are
Options- A. arrangement of microtubules
- B. length and location of basal bodies
- C. how the microtubules are fused to each other
- D. number, length and direction of force Discuss
More questions
Correct Answer: thermal death point
Correct Answer: Achromobacter
Correct Answer: Site-specific recombination
Correct Answer: Pedicoccus cerevisiae
Correct Answer: Cloudiness and ropiness
Correct Answer: Tumor necrosis factor (TNF)
Correct Answer: rickettsial antigens and antigens of certain strains of Proteus
Correct Answer: musty or earthy flavors
Correct Answer: The use of 25-40°C temperatures destroys potentially harmful bacteria
Correct Answer: number, length and direction of force
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