Answer: They act against several types of bacteria, which may also disturb the population of beneficial bacteria in the body.
- A They act against several types of bacteria, which may also disturb the population of beneficial bacteria in the body
- B They are absorbed poorly by the human digestive system compared with narrow-spectrum drugs as widely reported in standard reference material
- C They are effective mainly against viruses and have a limited effect on most bacterial cells under most conditions studied
- D They work mainly by raising body temperature, which can feel uncomfortable for the patient in most observed cases
Correct answer: A. They act against several types of bacteria, which may also disturb the population of beneficial bacteria in the body
Explanation: Broad-spectrum antibiotics act against a wide range of gram-positive and gram-negative bacteria, so along with harmful bacteria they can also reduce populations of beneficial bacteria in the body.
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.