(a)[2]
Identify the cell structures marked A and E.
(b)[1]
State the role of the structures labelled F.
(c)[1]
Name the process used for bacteria to enter the cell at C.
(d)[3]
Using the processes at B and D in Fig. 6.1, outline how acid hydrolases function in lysosomes.
(e)[2]
Carrier proteins in lysosomal membranes keep the pH below that of the surrounding cytoplasm by transporting hydrogen ions. Suggest how these carrier proteins sustain the lower pH inside lysosomes.