A-LevelBiologySelection and evolution9700/12 · May/June 2020 · Q371 Mark

Which statement about the development of resistance to antibiotics in bacteria is correct?

AAll mutations in bacteria result in resistance to antibiotics.

BAntibiotics increase the rate of mutation in bacteria.

CMutations leading to antibiotic resistance only occur when antibiotics are used to treat pathogenic bacteria.

DThe proportion of antibiotic-resistant bacteria in a population only increases if the antibiotic is used.

✓ Correct answer

D: The proportion of antibiotic-resistant bacteria in a population only increases if the antibiotic is used.

Oracle Prep sorts past-paper questions by topic, so you can drill Selection and evolution and see which topics are most likely to come up next.

Topic: Selection and evolution, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2020 Paper 1 Variant 2, question 37.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content