1.1. Figure 1 shows a list of sub-cellular structures and different cell types. Ribosomes are found in all three cell types.

Figure 1

(i) Complete the empty cells in Figure 1, if the sub-cellular structure is present, place a tick (✓) in the cell and if it is not present place a cross (×)

(4)

(ii) Give an explanation for why all the cell types contain ribosomes.

(2)

1.2. Describe the role of the permanent vacuole in plant cells.

1.3. Figure 2 shows some muscle cells which contain many mitochondria.

Figure 2

Give a reason why muscle cells contain many mitochondria.