A student claims that a contraceptive pill and a condom are equally effective at reducing HIV transmission because both can prevent pregnancy.
Which statement identifies the error in this claim?
HIV passes through air, so neither method can interrupt transmission
HIV is a bacterium, so pregnancy prevention cannot affect transmission
a condom limits fluid exchange, whereas the pill provides no such barrier
the pill limits fluid exchange, whereas a condom provides no such barrier
43 exam-style questions on Edexcel GCSE Biology 5.1 Health and communicable disease, covering 5.1.1 Communicable and non-communicable diseases, 5.1.2 Disease susceptibility interactions, 5.1.3 Pathogens as disease-causing organisms, 5.1.4 Common infections, 5.1.5 Spread and prevention of pathogens, 5.1.6 Lifecycle of a virus, and 5.1.7 Spread and prevention of STIs. Each one has a worked solution and a mark scheme showing where the marks go.