Researchers add an antibiotic that inhibits bacterial DNA replication to a culture of bacteria and to a culture of human cells infected with a virus. The bacteria stop reproducing, but the virus continues to reproduce.
Which statement explains why the antibiotic does not stop the virus reproducing?
The virus is copied using the host cell's machinery, which the antibiotic does not target.
The virus has a cell wall that stops the antibiotic from reaching its genetic material.
The virus has no genetic material, so there is nothing for the antibiotic to act on.
The virus is a type of bacterium that has already become resistant to this antibiotic.
87 exam-style questions on Edexcel GCSE Biology 5.3 Immune system and medicines, covering 5.3.1 The specific immune system, 5.3.2 Response to immunisation, 5.3.3 Advantages and disadvantages of immunisation, 5.3.4 Antibiotics and bacterial infections, 5.3.5 Aseptic techniques in culturing, 5.3.6 Cross-sectional areas of cultures, 5.3.7 Stages of developing new medicines, and 5.3.8 Production of monoclonal antibodies. Each one has a worked solution and a mark scheme showing where the marks go.