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Cell death

Cell death

(Science: cell biology) cells die (nonaccidentally) either when they have completed a fixed number of division cycles (around 60, the Hayflick limit) or at some earlier stage when programmed to do so, as in digit separation in vertebrate limb morphogenesis.

Whether this is due to an accumulation of errors or a programmed limit is unclear, some transformed cells have undoubtedly escaped the limit.

See: apoptosis.


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living forever

No as you say there is no sense for death evolution wise. However life is also in the hands of entropy, and there is a ... with is called telomere and actually represent the ends of the chromosome in the cell. But remember that evolution acts on individula, not on the species. If you had ...

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by canalon
Wed Sep 02, 2009 1:48 am
 
Forum: Cell Biology
Topic: living forever
Replies: 4
Views: 48

living forever

... our genes would spread even better. in school i learnt that inside the cell there is a molecule which getting shorter every time the cell divide and that is why at the end there is death (no more renewal of the body). but evolution can cancel this. my suggestion ...

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by meni
Tue Sep 01, 2009 9:33 pm
 
Forum: Cell Biology
Topic: living forever
Replies: 4
Views: 48

How does Head To Head Telomere Fusion express itself?

Maybe looking at the cell cycle during mitosis and seeing all the checkpoints might help you out. It could possibly end in cell death if the cell couldn't proceed thru its cell cycle. It is microtubules that connects the centromeres ...

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by kolean
Fri Aug 28, 2009 10:34 pm
 
Forum: Cell Biology
Topic: How does Head To Head Telomere Fusion express itself?
Replies: 3
Views: 63

Re: How does Head To Head Telomere Fusion express itself?

... that only involves the telomeres could even result in unbalanced germ cells. It would seem that the chromosomes would still properly align along ... center line which would result in unsuccessful meiosis possibly cell death. Where the spindles are bringing one unfused chromosome to one side ...

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by GaryGaulin
Sat Aug 22, 2009 11:44 pm
 
Forum: Cell Biology
Topic: How does Head To Head Telomere Fusion express itself?
Replies: 3
Views: 63

Re: Question for experts: Helicases

... detail. Anyway it amazes me that one could handle 3b nucleotides before cell death.

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by AFJ
Sat Jul 04, 2009 8:47 pm
 
Forum: Molecular Biology
Topic: Question for experts: Helicases
Replies: 4
Views: 193
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