In Fig. 1.1, structure A is protein-based. State the name of structure A.
In Fig. 1.1, structure B is a single-stranded molecule. Suggest the name of structure B.
Calculate the actual diameter of a Zika virus using the line X-Y in Fig. 1.2. Show your working. Give your answer in nanometres (nm).
A magnification of $\times 200\,000$ cannot be achieved by a light microscope. The resolution of a transmission electron microscope is also greater than that of a light microscope. Describe what is meant by the resolution of a microscope.
The vector for Zika virus is the mosquito *Aedes aegypti*. The mosquito feeds on the blood of an infected person and passes the virus to another person when it feeds again. Describe the similarities and differences between the transmission of Zika virus disease and the transmission of malaria.
One of the vaccines contains small proteins from the Zika virus. Explain how giving this vaccine to a person can lead to the development of long-term immunity against Zika virus disease.
Explain how a vaccination programme may limit the spread of Zika virus disease through a population.