A-LevelBiologyThe mitotic cell cycleFeb/Mar 2022Paper 2 Q27 Marks
(a) Fig. 2.1 shows a cell at one of the main stages of mitosis in the mitotic cell cycle. [Figure 2.1] (b) State the role of telomeres during DNA replication. (c) Multiple myeloma is a type of cancer in the bone marrow where some of the stem cells start to produce abnormal blood cells. • One treatment is to collect stem cells from the bone marrow of the person with multiple myeloma. Healthy stem cells are isolated and grown in the laboratory. • Radiation is then used to destroy all stem cells and cancerous cells in the bone marrow. • Finally, large numbers of the healthy stem cells grown in the laboratory are returned to the bone marrow. Suggest the role of stem cells in this treatment of multiple myeloma.
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