telomeres

by Todd Smith

Linear chromosomes are hard to maintain.

Replication fork - http://en.wikipedia.org/wiki/Telomere .

Every time their DNA gets replicated, it gets shorter. This is due to the fact that DNA polymerase can only add bases to the terminal 3'-OH of a DNA chain. The DNA replication initiation complex uses RNA primers to provide the initial 3'-OH and to initiate "lagging" strand synthesis. While one strand can be copied all the way to the ... Read more

Organisms with linear chromosomes have to solve the problem that DNA replication makes them shorter. This is due to the fact that DNA polymerase can only add bases to the terminal 3'-OH of a DNA chain. The DNA replication initiation complex uses RNA primers to provide the initial 3'-OH and ... Read more

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