(a)[1]
Several of the structures shown in Fig. 6.1 contain DNA. On Fig. 6.1, use a line labelled D to identify one of these structures.
(b)[1]
Name the stage of mitosis visible in Fig. 6.1.
(c)[2]
Colchicine is a chemical used by scientists to investigate mitosis. This chemical prevents the organisation of the microtubules in prophase of mitosis. The cell shown in Fig. 6.1 had not been treated with colchicine. Explain the evidence in Fig. 6.1 that shows the cell had not been treated with colchicine.