Question 22M.1A.HL.TZ2.19
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1A.HL.TZ2.19 |
| Level | HL | Paper | 1A | Time zone | TZ2 |
| Command term | Question number | 19 | Adapted from | N/A |
Some strains of the pathogenic bacterium Staphylococcus aureus have developed mechanisms that protect them against foreign DNA. What effect does this have on the evolution of antibiotic resistance in these strains of S. aureus?
A. Slower evolution, as bacteria with the antibiotic resistance gene will not reproduce
B. Slower evolution, as the antibiotic resistance gene from other species will not be accepted
C. Faster evolution, as mutations within a population are less likely to occur
D. Faster evolution, as antibiotic resistance genes can only be passed to individuals of the same species
[1]
B
Answered correctly by 50 % of the candidates that understood that by not accepting the antibiotic resistance gene, Staphylococcus aureus will be slow to develop resistance to the antibiotic.
