At what temperature range do most bacteria begin to multiply rapidly?

• A. 50–70 ^ext{o}C
• B. 20–40 ^ext{o}C
• C. 0–10 ^ext{o}C
• D. 80–100 ^ext{o}C

Answer: (B)

Verified step by step guidance

1. Understand that bacteria have optimal temperature ranges where their metabolic activities and reproduction rates are highest.
2. Recall that most bacteria that affect humans are mesophiles, which thrive at moderate temperatures.
3. Identify the temperature range typically associated with rapid bacterial multiplication, which is generally between 20°C and 40°C.
4. Recognize that temperatures below this range (0–10°C) slow down bacterial growth, while temperatures above (50–70°C and higher) often inhibit or kill bacteria.
5. Conclude that the temperature range where most bacteria begin to multiply rapidly is 20–40°C.