Growth and Nutrition of Bacteria problems
- 1. The fragmentation occurs in
Options- A. Streptomyces species
- B. Nocardia species
- C. Bacillus subtilis
- D. None of these Discuss
Correct Answer: Nocardia species
- 2. The microorganisms that grow best in a low-oxygen environment is called a (n)
Options- A. aerobe
- B. anaerobe
- C. facultative
- D. microaerophile Discuss
Correct Answer: microaerophile
- 3. 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
Correct Answer: lithotrophs
- 4. 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
Correct Answer: all of these
- 5. 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
Correct Answer: osmotolerant
- 6. 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
Correct Answer: both (a) and (c)
- 7. 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
Correct Answer: Liebig's law of the minimum
- 8. 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
Correct Answer: all of these
- 9. Postgates assay technique is useful in determining if a cell is viable even though it is
Options- A. incapable of cell division
- B. too small to see
- C. an obligate aerobe
- D. a thermophile Discuss
Correct Answer: incapable of cell division
- 10. Lag phase is also known as
Options- A. period of initial adjustment
- B. transitional period
- C. generation time
- D. none of these Discuss
Correct Answer: period of initial adjustment
More in Microbiology:
Programming
Copyright ©CuriousTab. All rights reserved.