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- Question
Which of the following is not the characteristic of a growth curve?
Options- A. Shows development of microbial population under relatively stable environmental conditions
- B. Plotted with logarithmic numbers
- C. Graphs numbers of microbes versus time
- D. Each growth curve consists of four distinct phases
- Correct Answer
- Each growth curve consists of four distinct phases
- 1. Autotrophic bacteria are those which
Options- A. make their own food
- B. form a long chain glycocalyx
- C. are highly susceptible to penicillin
- D. produce a blue-green pigment Discuss
- 2. The organism which grows best above 45°C are called
Options- A. psychrophilic
- B. mesosphilic
- C. thermophilic
- D. any of these Discuss
- 3. Bacteria of genus Nitrosomonas use __________ as their electron source.
Options- A. ammonia
- B. H2S
- C. succinate
- D. light Discuss
- 4. Which of the following organisms typically get their carbon for biosynthesis from carbon dioxide?
Options- A. Glucose-fermenting bacteria (fermentation)
- B. Anaerobic, glucose-respiring bacteria (anaerobic respiration)
- C. Aerobic, glucose-respiring bacteria (aerobic respiration)
- D. Ammonia-oxidizing bacteria (chemolithotrophic bacteria) Discuss
- 5. Which of the following is the suitable temperature range for mesophiles?
Options- A. 20-30°C
- B. 25-40°C
- C. >40°C
- D. None of these Discuss
- 6. The fragmentation occurs in
Options- A. Streptomyces species
- B. Nocardia species
- C. Bacillus subtilis
- D. None of these Discuss
- 7. The microorganisms that grow best in a low-oxygen environment is called a (n)
Options- A. aerobe
- B. anaerobe
- C. facultative
- D. microaerophile Discuss
- 8. Some organisms can use reduced inorganic compounds as electron donors and are termed as
Options- A. lithotrophs
- B. phototrophs
- C. chemotrophs
- D. photo-organotrophs Discuss
- 9. Quantitative measurement of bacterial growth can be carried out by measuring
Options- A. cell count
- B. cell mass
- C. cell activity
- D. all of these Discuss
- 10. An organism that expends energy to grow in a habitat with a low water activity in order to maintain internal solute concentrations to retain water is
Options- A. osmotolerant
- B. acidophile
- C. aerotolerant anaerobe
- D. alkalophile Discuss
Growth and Nutrition of Bacteria problems
Search Results
Correct Answer: make their own food
Correct Answer: thermophilic
Correct Answer: ammonia
Correct Answer: Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
Correct Answer: 25-40°C
Correct Answer: Nocardia species
Correct Answer: microaerophile
Correct Answer: lithotrophs
Correct Answer: all of these
Correct Answer: osmotolerant
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