Answer: Binding away from the active site.
- A Resembling the true substrate
- B Blocking the active site directly
- C Binding away from the active site
- D Raising substrate concentration
Correct answer: C. Binding away from the active site
Explanation: A non-competitive inhibitor binds at an allosteric site (away from the active site), changing the enzyme shape so the substrate can no longer be catalysed. Competitive inhibitors, by contrast, resemble the substrate and block the active site.
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.