16. Cancer Cells Normal Cells Don’t differentiate so don’t change shape as they mature Cell differentiation – cells change shape as they mature No contact inhibition – no need for directions from adjacent cells Contact inhibition – cell recognition is needed for cell reproduction Don’t stick - metastasis Adhere to each other Abnormal nuclei Normal nuclei Non-specialized Specialized to do a ‘job’ Divide uncontrollably Divide to replace damaged cells Do not die Finite life span
17.
18.
19.
20. In the diagram below the viral DNA at the top of the diagram is inserted at site 4 and the resulting oncogene shown below is produced.