Which of the following is NOT a typical effect of exotoxins on target cells?

• A. Disruption of cell membrane integrity
• B. Promotion of uncontrolled cell division
• C. Inhibition of protein synthesis
• D. Interference with nerve signal transmission

Answer: (B)

Verified step by step guidance

1. Step 1: Understand what exotoxins are. Exotoxins are toxic proteins secreted by certain bacteria that target specific cellular functions in host cells.
2. Step 2: Review the typical effects of exotoxins on target cells. Common effects include disruption of cell membrane integrity, inhibition of protein synthesis, and interference with nerve signal transmission.
3. Step 3: Analyze each option in the question to determine if it aligns with known exotoxin effects. For example, disruption of cell membranes and inhibition of protein synthesis are well-documented exotoxin actions.
4. Step 4: Consider the option 'Promotion of uncontrolled cell division.' This effect is generally not associated with exotoxins but rather with other factors such as oncogenes or carcinogens.
5. Step 5: Conclude that 'Promotion of uncontrolled cell division' is NOT a typical effect of exotoxins, distinguishing it from the other listed effects.