(a)[3]
Calculate the actual width of the cell labelled X. State the formula you will use for the calculation. Show your working and give your answer in micrometres to one decimal place.
(b(i))[4]
Fill in Table 1.1 by selecting one letter from Fig. 1.1 that shows a cell structure containing each biological molecule.
(b(ii))[1]
State the name of a cell structure shown in Fig. 1.1 where ATP is made.
(b(iii))[1]
Name a cell structure that makes mRNA.
(c)[2]
Describe the evidence from Fig. 1.1 that indicates the image is a transmission electron micrograph.