(a(i))[1]
Name the organelle indicated by X.
(a(ii))[1]
Put a tick (✓) in the box next to the cell type, or cell types, that contain this organelle.
(b)[3]
Use the scale bar to calculate the magnification of Fig. 5.1. State the formula and apply it in your calculation. Show your working.
(c)[2]
The organelle in Fig. 5.1 is made up of structures enclosed by a single membrane. Name two organelles that are enclosed by double membranes.
(d(i))[2]
The structure of the cell surface membrane is described as a fluid mosaic. Explain what is meant by the term fluid mosaic.
(d(ii))[4]
Outline the roles of the cell surface membrane.
(ii)[4]
Outline the roles of the cell surface membrane.