Psychrotrophs grow best at which temperature range?

Psychrotrophs grow best at which temperature range?

• A. Grow at low temperatures but prefer moderate; 15-30°C; max above 25°C
• B. Grow only at extremely cold temps below 0°C
• C. Grow best above 60°C
• D. Do not grow at any temperature below 20°C

Answer: (A)

Psychrotrophs can grow in cold environments yet prefer cool to moderate temperatures for optimal growth. They typically thrive around 15–30°C, and their growth is not limited to freezing conditions—they can also grow at temps above 25°C. This combination—capable of growth at low temperatures but with a growth optimum in the moderate range—defines them and explains why the statement describing growth at low temperatures with a preference for 15–30°C and a maximum above 25°C is the best fit. They are distinct from organisms that only tolerate extreme cold or only grow at much higher temperatures.

Psychrotrophs can grow in cold environments yet prefer cool to moderate temperatures for optimal growth. They typically thrive around 15–30°C, and their growth is not limited to freezing conditions—they can also grow at temps above 25°C. This combination—capable of growth at low temperatures but with a growth optimum in the moderate range—defines them and explains why the statement describing growth at low temperatures with a preference for 15–30°C and a maximum above 25°C is the best fit. They are distinct from organisms that only tolerate extreme cold or only grow at much higher temperatures.