IB Biology SL 3.2.14 Antibiotic resistance Question Bank
Practise IB Biology SL 3.2.14 by explaining how antibiotic use selects resistant bacteria.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain how variation and natural selection increase antibiotic resistance.
- Evaluate how antibiotic overuse creates risks for human populations.
C3.2.14—Antibiotic resistance evolution question 1
[Maximum number: 5]
Tuberculosis (TB) is an infectious disease caused by the bacterium Mycobacterium tuberculosis.
Describe the risk to the human population of indiscriminate use of antibiotics.
a. antibiotics block bacterial processes
b. example of bacterial process
c. variations exist naturally in a population / some are naturally resistant to the antibiotic
d. bacteria that are not resistant to this antibiotic will die / only resistant will survive (when antibiotic given)
e. this characteristic could be passed to next generation
f. (natural selection) leads to changes in the proportions/frequency in the population
g. human population will be exposed to antibiotic resistant bacteria and will not have antibiotic to kill them
h. (antibiotic resistant bacteria) may pass resistance to other bacteria species/types by means of plasmids (so other bacteria species turn resistant too)
e.g. cell wall formation
5 max
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