Question

Why do different temperatures produce different growth rates? 4 Why is it not advisable to conmect the data points for each organism in your grapht 5 Consider the shape of each aurve. Where is the optimum temperature relative to the range for each organismt 6 In what way(s) could you adjust the incubation temperature to grow an organism at less than its optimal growth rate? 110 MICROBIOLOGY: Laboratory Theory&Application, Brief

Answer 1

3. Because each organism has different temperatures at which they can survive beyond which they comes into dormant stage.

4. Because large gaps are there. Therefore more data sets/points are required to draw best fitted line

5. Temperature has a great impact on the growth of microorganism, their multiplication cycle and nutrient depletion. During the initial stage of growth curve, microorganisms adapt themselves in broth which consist of specific nutrients require for the growth that phase is called lag phase which is further followed by log phase in which they multiply and increases their number which further followed by stationary phase in which due to lack of nutrients microorganism starts dying and lastly death phase. This all cycle depends within specific temperature limits, that vary from one to another. Some bacteria can grow at freezing temperature while some can grow at thermal temperature. Therefore between the maximum and minimum limits, optimum temperature lies. At temperature, most bacterial strain multiplies vigorously.

6. We can increase or decrease the temperature to grow an organism at less than its optimal growth rate.

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