Tuesday, April 12, 2011

DNA Lab!

This lab was soo cool!! For some that don't know... DNA is a polmer.  In DNA, there are units that are called nucleotides.  The polymer is called polynucleotide.  For each nucleotide, it consists of a 5-carbon sugar, a nitrogen containging a base that is attached to the sugar, and a phosphate group.  However, there are 4 different types of nucleotides that are found in DNA. Down below will show you what each letter means:

A- Adenine
     Def: purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
G- Guanine
     Def: a purine base found in DNA and RNA; pairs with cytosine
C- Cytosine
     Def: a base found in DNA and RNA and derived from pyrimidine; pairs with guanine
T- Thymine
     Def: a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine
(In purine bases which are adenine and guanine there are 9 atoms that make up the fused rings, and all of the rings atoms lie in the same plane.)   


So.... in Bio. the class did this lab "DNA Extraction from Wheat Germ. To start off with, the color of the wheat germ soup was a runny brown color.  Then the color had changed while adding detergent and soap turning it lime-green with brown specks.  Adding this to the wheat, is the step of processing it to create DNA.  After, the appearance of the mixture after alcohol was added, there was a five different layer and now it has created more DNA.  At this step, DNA has been created because of the formation it has went through.  Finishing up the lab, the DNA looked like white Clump, kind of like sperm type.....< gross right?! Soooo.... in other words, by doing this lab, I learned about the formation of DNA and how it works!

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