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- Question
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
- Correct Answer
- all of these
- 1. 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
- 2. 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
- 3. 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
- 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
- 5. 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
- 6. 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
- 7. Lag phase is also known as
Options- A. period of initial adjustment
- B. transitional period
- C. generation time
- D. none of these Discuss
- 8. During exponential growth, the growth rate is
Options- A. number of generations per unit time
- B. reciprocal of generation time
- C. both (a) and (b)
- D. none of these Discuss
- 9. The generation time of a culture that produces two generations per hour is
Options- A. greater than that produces three generations per hour
- B. lesser than that produces three generations per hour
- C. equal to that produces three generations per hour
- D. none of the above Discuss
- 10. Which of the following is used to grow bacterial cultures continuously?
Options- A. Chemostat
- B. Coulter Counter
- C. Hemostat
- D. Petroff-Hausser chamber Discuss
Growth and Nutrition of Bacteria problems
Search Results
Correct Answer: Liebig's law of the minimum
Correct Answer: both (a) and (c)
Correct Answer: osmotolerant
Correct Answer: all of these
Correct Answer: lithotrophs
Correct Answer: incapable of cell division
Correct Answer: period of initial adjustment
Correct Answer: reciprocal of generation time
Correct Answer: greater than that produces three generations per hour
Correct Answer: Chemostat
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