DNA Replication

is that murphey brown?

Most thing alive uses the same processus for replication. See from an evolutive point of view. Everything that lives has dna. for something to be alive, it must replicate dna in order to reproduce itself (reproduction is part of what defines life). So for life to happen, dna was first invented and then something to replicate it so life would last. although the molecule might not be exactly the same, the replication process is very similar for all species.

metralios is quite right in his explanation. However, this reaction is only initiated when a cell needs to reproduce itself. Therefore, there is a right time for this reaction to happen. To control the timing, the cell adds an inhibitor (like an on/off switch) to the machine so the replication doesn't occur when it's not supposed to. An other chemical signal will remove the inhibitor when the cell the replication. This can get really complicated. There are often a lot of control molecule (switch

WOW!!!!

JUST  ONE WORD WOW

So, eventhough these 3D animations show huge empty spaces and molecules coming in to the place and then going away, in real life this would be more like a box fill with balls hitting each other at very high speed, then at some point ball A will hit ball B oand cause the right reaction? Then, the cell works based on the assumption that there's high probability that any pair of chemicals will interact at some point?

I've a theory in my head.

not all molecules appear always at the right time. all molecules " appropriate or not " will meet this "machine" by brownian "zig zag" movement. but only a molecule with the appropriate " shape" would fit to this machine.
so, there is no appropriate time needed. only appropriate shape
it is like try and error
again. i'm not specialized, but i thought of that question long time ago.

where can you get such music? :P

this is really cool but is quite hard to comprehend. (the animation that is, not the actual replication).

They're unable to think. Remember: a brain is required to think. Cells may seem intelligent, but they're just preprogrammed chemicals that respond the same way everytime (kind of like how sugar always melts in water, and how steam always rises instead of falling. They don't think, it just happens).

The molecules work because they're shaped correctly. I can't say for sure how it happens, but chemical signals induce the chemicals to bind/do their job at the right time.