A-LevelBiologyInfectious diseases9700/12 · Oct/Nov 2015 · Q341 Mark

Why is it necessary for a person with a bacterial infection to take antibiotics at evenly spaced time intervals?

Ato increase the concentration of antibiotic slowly to a level which is lethal to the bacteria

Bto maintain a concentration of antibiotic in the body which is lethal to the bacteria

Cto prevent the development of resistant strains of bacteria

Dto select and kill the resistant strains of bacteria

✓ Correct answer

B: to maintain a concentration of antibiotic in the body which is lethal to the bacteria

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Topic: Infectious diseases, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2015 Paper 1 Variant 2, question 34.

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