Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

11. Controlling Microbial Growth

Selecting a Method to Control Microbial Growth

Microbiology

11. Controlling Microbial Growth

Selecting a Method to Control Microbial Growth

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Multiple Choice

Which microbial control method is most effective for killing a population of Bacteria X?

A microbial control method with a D-value of 1 hour.

A microbial control method with a D-value of 10 minutes.

A microbial control method with a D-value of 30 minutes.

A microbial control method with a D-value of 2 hours.

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Verified step by step guidance

Understand the concept of D-value: The D-value, or decimal reduction time, is the time required at a certain condition (e.g., temperature) to kill 90% of the microorganisms or reduce the population by one log cycle.

Compare the D-values provided: A lower D-value indicates a more effective microbial control method because it takes less time to achieve the same level of microbial reduction.

Analyze the options: You have D-values of 10 minutes, 30 minutes, 1 hour, and 2 hours. The method with the smallest D-value will be the most effective.

Identify the most effective method: The method with a D-value of 10 minutes is the most effective because it requires the least amount of time to reduce the bacterial population by 90%.

Conclude the analysis: The microbial control method with a D-value of 10 minutes is the most effective for killing a population of Bacteria X, as it achieves the desired reduction in the shortest time.