Frequent treatment with antibiotics can result in resistant strains of bacteria, explain how.

A mutation can occur, causing the formation of an antibiotic resistant gene within a bacteria. This bacteria will then survive the course of antibiotics and reproduce, passing on the gene by vertical gene transmission. The antibiotic resistant gene is then passed to other bacteria through horizontal gene transmission.

HA

Related Biology A Level answers

All answers ▸

Describe what happens in glycolysis.


Describe how HIV replicates in the human body


It has been suggested that smoking, an epigenetic factor can lead to tumour growth and cancer. Use your knowledge of the epigenome and its structure to explain how this could occur. [5 marks]


Maltose is hydrolysed by the enzyme maltase. Explain why maltase catalyses only this reaction.