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.
The strands of DNA are antiparallel, meaning that they are parallel to each other, but in the opposite direction. DNA helicase opens the DNA so that both strands are exposed. During the process of replication, this double helix is unwound, and nucleotide bases are added to both strands going in the 5' to 3' direction.