Cancer cells undergo mitosis at an abnormal or decresed rate?

Answer 1

Cancer cells undergo mitosis at an increased rate and there can be a number of reasons for this. Either the receptors on the cell surface membrane of some cells have been permanently activated and so they continue to divide even in the absence of growth factors. Also, excessive amounts of growth factors can be coded for which will also lead to increased division. In addition, there could be a mutation in tumour-supressor genes which means that they are no longer able to inhibit cell division which then accelerates. Activated oncogenes can also directly cause cell replication by activating intracellular pro-proliferation pathways (ras, myc, etc.). You can say that cancer is due to abnormal cell division but you can't sat that it is at a decreased rate.

Answer 2

Cancer cells tend to undergo mitosis at a faster rate compared to normal cells, leading to uncontrolled cell division and tumor formation. This rapid and abnormal cell division is a characteristic feature of cancer growth and progression.