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- Question
The archaebacterium Halobacterium, an extreme halophile, and Sulfolobus, a thermoacidophile, can be cultured in the presence of antibiotics such as streptomycin and chloramphenicol because
Options- A. they contain ether-linked isoprenoids in their plasma membrane
- B. they lack murein in their cell wall
- C. they contain 80S, as opposed to 70S, ribosomes
- D. all of the above
- Correct Answer
- they lack murein in their cell wall
- 1. Which of the following is responsible for the corrosion problem?
Options- A. Iron bacteria
- B. Sulfur bacteria
- C. Slime forming bacteria
- D. All of these Discuss
- 2. When the fermentation of fructose results in the bitter product mannitol, the fermentation is sometime termed as-
Options- A. mannkic
- B. mannitic
- C. amertume
- D. none of these Discuss
- 3. Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to
Options- A. chlorophyta
- B. chrysophyta
- C. pyrrophyta
- D. rhodophyta Discuss
- 4. Colorless rots in eggs is caused by
Options- A. Pseudomonas alcaligenes
- B. Pseudomonas fluorescens
- C. both (a) and (b)
- D. none of these Discuss
- 5. The presence of viable non-spore forming bacteria in heat process canned foods indicates leakage of the container. Which of the following is responsible for the spoilage of leaky cans?
Options- A. Plant equipment
- B. Cooling water
- C. Highly acidic medium
- D. High sugar content Discuss
- 6. The plasmids can be eliminated from a cell by the process known as
Options- A. curing
- B. breaking
- C. fixing
- D. expulsion Discuss
- 7. Aerobic catabolism of glucose yields how much energy (ATP synthesized) relative to glucose fermentation?
Options- A. Slightly less
- B. About the same
- C. Twice as much
- D. More than 10 times as much Discuss
- 8. Which of the following(s) bacteria belong to the family Entero-bacteriaceae?
Options- A. Yersinia
- B. Shigella
- C. Salmonella
- D. All of these Discuss
- 9. Which phage always carries a small piece of E.coli genome?
Options- A. Lambda
- B. Mu
- C. T4
- D. T3 Discuss
- 10. 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
More questions
Correct Answer: Sulfur bacteria
Correct Answer: mannitic
Correct Answer: pyrrophyta
Correct Answer: Pseudomonas alcaligenes
Correct Answer: Cooling water
Correct Answer: curing
Correct Answer: More than 10 times as much
Correct Answer: All of these
Correct Answer: Mu
Correct Answer: Acetic acid
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