Question

microbiology expert needed

answer question 2,3,4 (focus on #2)

Thank you!

happen Bacterium Y is grown 10°C below its minimum temperature. Explain what would have to the number of cells in the population of Bacterium Y (increase, decrease or remain the same) and provide an explanation of how the growth conditions affect Bacterium Y. (10 points) 2. 3. Name a bacterium that is a psychrophile. 4. Classify the following microbes based on the data. (10 points) pH 9 Classification AciD Alkalinophilet Neutrophile
  

Answer 1

2. The growth pattern of bacterium Y will be dependent on whether it is mesophile, psychrophile or psychrotolerant.

Condition 1 : Bacterium Y is a mesophile. The number of cells in a population will decrease.  At lower temperatures than the optimal temperatures, molecules move slower, enzymes cannot mediate in chemical reactions, and eventually the viscosity of the cell interior decreases the cell activity.

Condition 2 : Bacterium Y is a psychrohile. The number of cells in a population will increase. Psychrophilic organisms grow best at lower temperatures (-10⁰C to +10⁰C)

Condition 3 : Bacterium Y is a psychrotolerant. The number of cells in a population will remain same. Psychrotrophic or psychrotolerant bacteria are mesophilic organsims which are able to survive but not grow at lower temperature than minimum.

Each species of microbe has its own upper and lower limiting value of temperature for growth which is unique to that microbe.

3. Psychrophilic bacteria - Arthrobacter flavus, Psychrobacter faecalis

4. The answer given by student is correct.

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