The wonders of a tiny cell

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Duration: 2 minutes and 50 seconds

Country: United Kingdom

Language: English

License: CC - Attribution Non-commercial No Derivatives

Genre: Music Video

Views: 47 (11 embedded)

Posted by: lolaceituno on Sep 24, 2008

We can see the inside a cell and find out how it works

We can enter the cell to view this remarkable system at work.
After entering the heart of the cell
we see the tighly ...... strands of DNA
storehouses for the instructions necessary to build every protein in an organism.
In a process known as transcription
a molecular machine first unwind a section of DNA helix
to expose the genetic instructions needed to assemble a specific protein molecule
Another machine, then, copies these instructions to form a molecule known as messenger RNA.
When transcription is complete, the slender RNA strand
carries the genetic information though the nuclear pore complex.
the gatekeeper for traffic in and out of the cell nucleus
The messenger RNA strand is directed to a two-part molecular factory called a ribosome
After attaching itself securely, the process of translation begins.
Inside the ribosome, a molecular assembly line
builds a specifically secuenced chain of amino acids.
These amino acids are transported from other parts of the cell
and then linked into chains often hundreds of units long.
Their secuencial arrangement determines the type of protein manufactured.
When the chain is finished, it is moved from a ribosome to a barrel-shaped machine
that helps fold it into the precise shape critical to its function.
After the chain is folded into a protein,
it is then released a shephered by another molecular machine
to the exact location.