Development of antibiotic resistance
A random mutation occurs in the DNA of individual bacterial cells . The mutation protects the bacterial cell from the effects of the antibiotic - it becomes antibiotic resistant. Antibiotic resistant bacteria survive and can reproduce with less competition.
17 сент. 2024 г. · a random mutation can give rise to a new bacterial allele that codes for antibiotic resistance · when the bacterial population is exposed to an ... |
The number of resistant strains has increased, partly due to the misuse of antibiotics. This has resulted in more infections that are difficult to control. MRSA ... |
A mutation may occur that enables a bacterium to resist being killed by antibiotic treatment, while the rest of the populating is killed when treated. |
© UCLES 2018. [Turn over. (c) (i) Explain how bacteria become resistant to antibiotics and how humans can reduce the problem of antibiotic resistance. |
Bacteria can gain antibiotic resistance. Mutations occur rapidly and randomly. Sometimes when they occur, they provide bacteria with a selective advantage. This ... |
A mutation occurs in a bacterial cell which makes it resistant to an antibiotic. 2. When that antibiotic is administered, this cell is not killed, whereas cells ... |
6 апр. 2024 г. · Antibiotic resistance develops through natural selection and adapting to the environment. It is also caused by unnecessary or excessive use of antibiotics. |
A chance mutation in bacterial DNA allows certain bacteria to become resistant to certain types of antibiotic. |
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