2020HSCQ32 (a)Rabies is a disease that can affect all mammals and is caused by the rabies virus. It is transmitted by the bite of an infected animal. Without treatment it almost always results in death. Use the information provided to identify TWO features of the rabies infection that facilitate transmission of the pathogen to a new host.2 marksShort answer
2020HSCQ32 (b) (i)Use the information provided in Diagram 1 to explain why the rabies virus cannot be classified as a cellular pathogen.3 marksShort answer
2020HSCQ32 (b) (ii)After infection the virus reproduces in muscle cells near the bite site and in the central nervous system. This requires the single-stranded rabies RNA to be transcribed, translated and replicated in the cytoplasm of host cells. These processes are shown in Diagram 2. Use the information provided in Diagrams 1 and 2 to explain the role of viral RNA polymerase in the reproduction of the virus.5 marksShort answer
2019HSCQ31 (b)Explain how the mode of transmission of pathogens influences the spread of diseases.3 marksShort answer
2019HSCQ31 (a)Outline ONE adaptation of a specific pathogen that facilitates its entry into a host.2 marksShort answer