Infection And Response - Aqa Biology Questions (GCSE Biology)

What is meant by “herd immunity” in the context of vaccination?

Why are viruses not grown on nutrient agar plates in the laboratory?

Which component of the immune response produces antibodies specific to a pathogen’s antigen?

Which is the most likely explanation if an antibiotic that was effective last year no longer works against a strain of bacteria on the same farm?

Which of the following differences correctly distinguishes sexual reproduction from asexual reproduction in protists like the malarial parasite?

When designing a study to compare two antibiotics’ effectiveness with disk diffusion, which quantitative measurement gives the best comparison?

When monoclonal antibodies are used on a test strip and they bind the target steroid in urine, why does a coloured dye appear at the test area?

What is the primary reason preclinical testing is performed before clinical trials in humans?

Which of the following is the best evidence that a lateral-flow test has failed to work?

Which statement correctly differentiates a virus from a bacterium?

Why might reports about a plant-derived drug’s benefits be biased?