(a(i))[3]
Describe how a DNA molecule is structured.
(a(ii))[1]
State what a gene does.
(b)[2]
State what mitochondria do.
(c)[2]
Give two characteristics shared by all prokaryotes.
(d)[3]
Use the information in Table 5.1 to complete the classification tree in Fig. 5.1. Put the letter for each species or the mitochondria into the box beside the correct branch of the classification tree. Two have already been completed for you.
(e)[1]
Suggest why DNA sequences are a helpful way to identify species of bacteria.