Which temperature is outside the bacterial growth range?

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Multiple Choice

Which temperature is outside the bacterial growth range?

Explanation:
Bacteria grow best within a middle range of temperatures; too cold slows or stops their metabolism, while too hot damages their cellular structures and kills many of them. The upper limit for most common bacteria is around 140°F (60°C), so 150°F is high enough to prevent growth or to kill bacteria, placing it outside their growth range. The other temperatures—72°F (room temperature), 50°F (cooler/refrigeration-like), and 110°F (warm)—fall within the broad range where many bacteria can still multiply, though their growth rates vary.

Bacteria grow best within a middle range of temperatures; too cold slows or stops their metabolism, while too hot damages their cellular structures and kills many of them. The upper limit for most common bacteria is around 140°F (60°C), so 150°F is high enough to prevent growth or to kill bacteria, placing it outside their growth range. The other temperatures—72°F (room temperature), 50°F (cooler/refrigeration-like), and 110°F (warm)—fall within the broad range where many bacteria can still multiply, though their growth rates vary.

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