DNA Organization and Aging Eukaryotic DNA Organization Prokaryotic DNA organization Telomeres and Aging – Fountain of Youth?

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Eukaryotic DNA Organization ____________ This allows us to fit 6 feet of DNA in each cell!

Prokaryotic DNA organization The bacterial DNA consists almost entirely of one chromosome that is commonly circular It can be linear in some cases

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Telomeres However, DNA polymerase needs a starting point therefore, it uses a primer. What ………….

___________ Therefore it cannot synthesis the end piece of DNA. That section is lost to both the parent and replicated strand.

Telomeres The loss of DNA during every cycle of replication causes chromosomes to continually shorten and can lead to the loss or damage of important genes. To prevent the loss of essential coding regions of DNA, zones of repetitive, …………….. ___________

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If chromosomes were not capped by telomeres, a small portion of a gene near the end of a chromosome could be lost every time DNA replication occurred. ___________ After many DNA replications, the telomeres are completely lost and therefore no ………….

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