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Biology: DNA replication
Biology: DNA replication
Published by Alice
01-18-2011
Biology: DNA replication

Part 1 of a mini-series of articles about science and stuff.
Yes, I'm a nerd.

--------------------

let's get into the basic structure of DNA, nucleotides. Nucleotides are made up of 3 parts. Phosphate, Dexyribose Sugar, and 1 of 4 nitrogen bases. THe structure is similar to this:


The nitrogen bases are Thymine, Adenine, Cytosine and Guanine. Thymine bonds with Adenine, and Guanine bonds with Cytosine. This is ALWAYS true.
These pairs construct the double helix shape we know as DNA. Now we will get into how the DNA replicates to grow and repair.

simply put, the double helix unwinds, so we have more of a ladder shape. Then, an enzyme called DNA helicase removes the nitrogen bonds in the nucleotides. We hen have something like this:


Now that the nucleotides are separate, another enzyme, DNA Polymerase, come by and adds complementary nucleotides. so basically, it is replacing the detached nucleotides with new nucleotides. so then, we have 2 identical strands of DNA, that rewind into double helix shapes.
and that, is DNA replication.
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  #1  
By Alice on 01-18-2011, 11:09 PM
warning, this is a very condensed version of DNA replication. :P
  #2  
By Alucard on 01-18-2011, 11:35 PM
And remember students, This all takes place in the nucleus, where, during Cell Replication, DNA strands clump together into the chromosomal X forms we all recognize

EDIT: Alice has kindly informed me that they are referred to as chromatids
  #3  
By Mascara on 01-19-2011, 07:16 AM
neato. glad you posted this on a nintendo site... in the nintendo corner...
  #4  
By Mikematute on 01-19-2011, 05:07 PM
lol. I thoght it would be more complicated.
  #5  
By Alice on 01-19-2011, 07:21 PM
Quote:
Originally Posted by MascaraLust View Post
neato. glad you posted this on a nintendo site... in the nintendo corner...
Well meh...
  #6  
By SuperGamecube64 on 01-22-2011, 03:03 AM
When I came up with the idea for this section, I never expected to see this sort of thing...
  #7  
By Alice on 01-26-2011, 07:28 PM
Quote:
Originally Posted by SuperGamecube64 View Post
When I came up with the idea for this section, I never expected to see this sort of thing...
Expect the unexpected.
  #8  
By NommyNommy on 01-27-2011, 04:38 PM
I can see clearly now
  #9  
By Tanis on 01-28-2011, 12:36 AM
Yay, 10th grade all over again!
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