Answer: Sulphanilamide.
- A Chloroquine
- B Chloramphenicol
- C Penicillin
- D Sulphanilamide
Correct answer: D. Sulphanilamide
Explanation: Prontosil is a prodrug; in the body it is converted into sulphanilamide, the actual antibacterial species, which competes with PABA in bacteria.
The hydrophobic hydrocarbon tail of each soap/detergent molecule dissolves into an oily dirt droplet, while the hydrophilic (ionic) head stays in the surrounding water - trapping the grease inside a micelle that rinses away with water.
Concept context
Drugs and how they interact with biological targets, chemicals in food, and cleansing agents (soaps and detergents) - chemistry applied directly to daily life and healthcare.