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Hydrodynamically noseriding is inefficient as a means of accelerating the board, as planing craft need to reduce wetted surface area as they accelerate (because less wetted surface area is required to produce the necessary lift as the board moves faster).[link widoczny dla zalogowanych] Noseriding prevents a reduction in wetted surface area and thus limits the speed of the board. There is a very common misconception that noseriding accelerates the board but actually it is a slowing or stalling move.
In the 1960s noseriding developed into an end unto itself and the "nose" came to be defined as the front 25% of the board. While success at this sub-genre is grossly measured in proximity to the tip of the board and time spent there, the acknowledged artists (Nuuhiwa, Carson, Tudor, Marcon among them) move forward and backward fluidly on the board by cross-stepping or "walking" foot-over-foot (never shuffling) with poise and economy of movement, resolving changes in upward pressure with subtle adjustments to their center of gravity using knees, waist and hips (upper bodies ever quiet) and position on the board; never the arm waving and upper body histrionics of most other surfers.
The vast majority of living organisms encode their genes in long strands of DNA.[link widoczny dla zalogowanych] DNA (deoxyribonucleic acid) consists of a chain made from four types of nucleotide subunits, each composed of: a five-carbon sugar (2'-deoxyribose), a phosphate group, and one of the four bases adenine, cytosine, guanine, andthymine. The most common form of DNA in a cell is in a double helix structure, in which two individual DNA strands twist around each other in a right-handed spiral. In this structure, the base pairing rules specify that guanine pairs with cytosine and adenine pairs with thymine. The base pairing between guanine and cytosine forms three hydrogen bonds, whereas the base pairing between adenine and thymine forms two hydrogen bonds. The two strands in a double helix must therefore be complementary, that is, their bases must align such that the adenines of one strand are paired with the thymines of the other strand, and so on.
Due to the chemical composition of the pentose residues of the bases,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych] DNA strands have directionality. One end of a DNA polymer contains an exposed hydroxyl group on the deoxyribose; this is known as the 3' end of the molecule. The other end contains an exposed phosphate group; this is the 5' end.