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# Microbial Growth Factors ## Temperature The optimum is required for efficient activity of many bacterial enzymes, although bacteria can grow in a wide range of temperatures. | Term | Definition | |---|---| | Mesophiles | Microorganisms that thrive at moderate temperatures, typically between 20°...

# Microbial Growth Factors ## Temperature The optimum is required for efficient activity of many bacterial enzymes, although bacteria can grow in a wide range of temperatures. | Term | Definition | |---|---| | Mesophiles | Microorganisms that thrive at moderate temperatures, typically between 20°C and 45°C | | Thermophiles | Organisms that grow best at higher temperatures, usually between 45°C and 80°C. | | Psychrophiles | Microbes that prefer cold temperatures, typically between 0°C and 20°C. | | Hyperthermophiles | Extremophiles that thrive at very high temperatures, usually above 80°C. | ## pH | ACIDIC | ALKALINE | |---|---| | **1** | **14** | | **2** | | | **3** | | | **4** | | | **5** | | | **6** | | | **7** | NEUTRAL | | **8** | | | **9** | | | **10** | | | **11** | | | **12** | | | **13** | |