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- Question
Some organisms can use reduced inorganic compounds as electron donors and are termed as
Options- A. lithotrophs
- B. phototrophs
- C. chemotrophs
- D. photo-organotrophs
- Correct Answer
- lithotrophs
- 1. The microorganisms that grow best in a low-oxygen environment is called a (n)
Options- A. aerobe
- B. anaerobe
- C. facultative
- D. microaerophile Discuss
- 2. The fragmentation occurs in
Options- A. Streptomyces species
- B. Nocardia species
- C. Bacillus subtilis
- D. None of these Discuss
- 3. 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
- 4. 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
- 5. The organism which grows best above 45°C are called
Options- A. psychrophilic
- B. mesosphilic
- C. thermophilic
- D. any of these Discuss
- 6. 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
- 7. 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
- 8. Generation time is
Options- A. time required for the population to double
- B. time required for the initial adjustment
- C. obtained by expression t/n, where t = time interval, n = number of generation
- D. both (a) and (c) Discuss
- 9. The total biomass of an organism will be determined by the nutrient present in the lowest concentration relative to the organism's requirements is a statement of
Options- A. Liebig's law of the minimum
- B. Shelford's law of tolerance
- C. quorum sensing
- D. Heisenberg's principle of uncertainty Discuss
- 10. Exponential phase of growth curve of bacteria is of limited duration because of
Options- A. rise in cell density
- B. accumulation of toxic metabolites
- C. exhaustion of nutrients
- D. all of these Discuss
Growth and Nutrition of Bacteria problems
Search Results
Correct Answer: microaerophile
Correct Answer: Nocardia species
Correct Answer: Each growth curve consists of four distinct phases
Correct Answer: make their own food
Correct Answer: thermophilic
Correct Answer: all of these
Correct Answer: osmotolerant
Correct Answer: both (a) and (c)
Correct Answer: Liebig's law of the minimum
Correct Answer: all of these
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