â Noodle originated in China and the name is derived from a German nudel which means pasta, and spaghetti originated in Italy. â Noodle is thin and elongated in shape. Spaghetti is long, cylindrical in shape and differs in thickness. â Noodle is made of unleavened dough cooked in boiling water and oil.
1 The helix in the double helix means that the entire thing is wound up in a spiral. 2  DNA composition: purine and pyrimidine bases, sugars, phosphate. 3  Nucleotide = base (Adenine, Guanine, Thymine, Cytosine) + sugar + phosphate. 4  Nucleoside = base + sugar = Adenosine, Guanosine, Thymidine, Cytidine.
DNA helicase is responsible for taking apart our DNA double helix. Just like a zipper makes a Y-shape with the two strands of teeth, the action of DNA helicase results in a Y-shaped fork in the molecule, which we call a replication fork.