(a)[3]
Identify the structures A to C.
(b(i))[1]
State the role of structure C.
(b(ii))[2]
Explain why structure C cannot be observed with a light microscope.
(c)[1]
Suggest one disadvantage of the electron microscope compared with the light microscope when studying cells.
(d)[2]
Calculate the magnification of the image in Fig. 1.1. Show your working and give your answer to the nearest whole number. The scale bar represents $6\ \mu\text{m}$.