Monday, January 24, 2011

Gel Electrophoresis....For What!?!

Another way our gene code can be useful takes advantage of the sequences of our nucleotides.

REMEMBER!!

Nucleotides are composed of 3 parts: a phosphate group, a 5 carbon sugar, and a nitrogenous base.

In DNA, there are 4 nitrogenous bases (Adenine, Thymine, Guanine, and Cytosine).

In RNA there are similar bases, but one is different: (Adenine, URACIL, Guanine, and Cytosine).

http://evolution.berkeley.edu/evolibrary/images/history/dna_structure.gif
DNA is double stranded meaning that there are 2 nucleotides connected by their nitrogenous bases that when combined in succession make a double helix.  This shape almost looks like a ladder.  The rungs would be the nitrogenous bases and the outside would be the phosphate group and the 5 carbon sugar.