Growth and Nutrition of Bacteria problems
- 1. What is the primary source of food for marine life?
Options- A. Phytoplankton
- B. Zooplankton
- C. Sea weed
- D. Grass Discuss
Correct Answer: Phytoplankton
- 2. Nutrient content and biological structures are considered as
Options- A. implicit factor for microbial growth
- B. intrinsic factor for microbial growth
- C. processing factor
- D. none of the above Discuss
Correct Answer: intrinsic factor for microbial growth
- 3. The cell reproduction in bacteria may occur by
Options- A. binary fission
- B. budding
- C. fragmentation
- D. all of these Discuss
Correct Answer: all of these
- 4. All organisms require at least small amounts of carbondioxide, However, some can use CO2 as their sole source of carbon. Such organisms are termed as
Options- A. autotrophs
- B. phototrophs
- C. chemotrophs
- D. photo-organotrophs Discuss
Correct Answer: autotrophs
- 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
Correct Answer: 25-40°C
- 6. 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
Correct Answer: Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
- 7. Bacteria of genus Nitrosomonas use __________ as their electron source.
Options- A. ammonia
- B. H2S
- C. succinate
- D. light Discuss
Correct Answer: ammonia
- 8. The organism which grows best above 45°C are called
Options- A. psychrophilic
- B. mesosphilic
- C. thermophilic
- D. any of these Discuss
Correct Answer: thermophilic
- 9. 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
Correct Answer: make their own food
- 10. 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 Discuss
Correct Answer: Each growth curve consists of four distinct phases
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