DNA Structure and Replication

ID #2074

Why are some cells with telomerase harmful, like cancers, but others aren't, like stem cells?

We won't go into telomeres or telomerase any more than we already have, but the essence behind cancer cells is that under normal conditions, cells are carefully regulated as to which ones can replicate and when. Cancerous cells have lost the ability to be regulated, and they replicate and divide in an unregulated manner, eventually commandeering all the resources (blood flow, oxygen, etc.) of that area (the tumor), and ultimately killing off the cells that are trying to do what they're "supposed" to do.

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