Question

what is the temperature range of tolerance for mesophilic bacteria?

-5°c to 20°c
50°c to 80°c
greater than 80°c
20°c to 50°c

Explanation:

Identify the temperature classification of mesophiles

Mesophiles are organisms that grow best in moderate temperature environments, typically ranging from \(20^\circ\text{C}\) to \(45^\circ\text{C}\) or \(50^\circ\text{C}\), with an optimum growth temperature around \(37^\circ\text{C}\) (human body temperature).

Evaluate the given options

• \(-5^\circ\text{C}\) to \(20^\circ\text{C}\): This range corresponds to psychrophiles or psychrotolerant microbes.
• \(50^\circ\text{C}\) to \(80^\circ\text{C}\): This range corresponds to thermophiles.
• Greater than \(80^\circ\text{C}\): This range corresponds to hyperthermophiles.
• \(20^\circ\text{C}\) to \(50^\circ\text{C}\): This matches the standard physiological range for mesophilic bacteria.

Answer:

• (A) -5°C to 20°C
• (B) 50°C to 80°C
• (C) greater than 80°C
• (D) 20°C to 50°C (Correct answer)