Discussion
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- Question
The production of sufficient acid by fermentation of glucose leads to decrease in pH such that pH of the medium falls below 4.5. Which of the following test can detect it?
Options- A. Indole test
- B. Methyl red test
- C. Citrate utilization test
- D. Voges-Proskauer test
- Correct Answer
- Methyl red test
- 1. The time required to kill 90% of the microorganisms in a sample at a specific temperature is the
Options- A. decimal reduction time
- B. thermal death point
- C. F value
- D. D value Discuss
- 2. Which of the following theory of antibody production is most widely accepted?
Options- A. Side chain theory
- B. Clonal selection theory
- C. Direct template theory
- D. Indirect template theory Discuss
- 3. Entner-Doudoroff pathway is found in
Options- A. aerobic prokaryotes
- B. anaerobic prokaryotes
- C. both (a) and (b)
- D. aerobic eukaryotes Discuss
- 4. 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
- 5. Pink rots in eggs is caused by the strains of
Options- A. Pseudomonas
- B. Pseudomonas fluorescens
- C. species of Micrococcus or Bacillus
- D. none of the above Discuss
- 6. Which of the following viruses belong/s to family caliciviridae?
Options- A. Hepatitis B virus
- B. Hepatitis D virus
- C. Hepatitis E virus
- D. All of these Discuss
- 7. The time from infection until lysis is called as
Options- A. eclipse period
- B. rise period
- C. latent period
- D. burst size Discuss
- 8. Ethylene oxide is used to destroy or kill which of the following microbes?
Options- A. Bacteria
- B. Spores
- C. Fungi
- D. All of these Discuss
- 9. Bacteriophages have been used widely in genetic research, since they are the smallest and simplest biological entities capable of
Options- A. self-replication
- B. duplication
- C. self-duplication
- D. multiplication Discuss
- 10. Thiobacillus thiooxidans has an optimum pH of
Options- A. 2.0-3.5
- B. 0.5-6.0
- C. 6.5-7.5
- D. 9.0-9.5 Discuss
More questions
Correct Answer: D value
Correct Answer: Clonal selection theory
Correct Answer: both (a) and (b)
Correct Answer: all of the above
Correct Answer: Pseudomonas
Correct Answer: Hepatitis E virus
Correct Answer: latent period
Correct Answer: All of these
Correct Answer: self-replication
Correct Answer: 2.0-3.5
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