From the data in Fig. 3.1, work out the mass of water in a human eye. Give your answer to two significant figures.
Describe why water is important in the human body.
State the names of structures L and M shown in Fig. 3.2.
Identify two features shown in Fig. 3.2 that are typical of prokaryotes.
State the type of pathogen that causes cholera.
State the genus of this pathogen.
Explain how the cholera pathogen leads to dehydration of the human body.
Complete the sentences about how plasmids are used in genetic modification. During genetic modification, human DNA and plasmid DNA are cut with a restriction enzyme. This produces [BLANK] that are joined using an enzyme called [BLANK]. The modified plasmid carrying the human gene is known as a [BLANK] plasmid.