Answer: Bactericidal.
- A Bacteriostatic
- B Bactericidal
- C Antiseptic
- D Antipyretic
Correct answer: B. Bactericidal
Explanation: Bactericidal antibiotics (e.g. penicillin) kill bacteria directly. Bacteriostatic antibiotics (e.g. erythromycin) only inhibit growth, relying on the immune system to clear the rest.
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.