Various DNA double helix.
Clip ids reading left to right, top down are 609-42;
609-43; 609-44; 609-50, 609-51, 609-49, 609-46, 609-45, 609-48
The DNA animations are HD 1920 by 1080, 25 fps,
these genetic animation previews are 400 by 225 mpg's.
dna, genetics, genetic testing, dna
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DNA: DNA molecules hold the genetic informaion required for the
maintenance and function of most living cells. A DNA molecule is formed
by two chemical strands coiled around each other to form a double helix.
The DNA does this by copying itself into similar RNA structures. The DNA
uncoils inteslf, one strand forming the template on which RNA is formed.The
resultant message RNA is passed out of the nucleus, into the surrounding
cytoplasm. Here it forms a template for the sysnthesis of required proteans
such as enzymes.
DNA is able to replicate itself, it does this by seperating its helix
strands, each providing a template for the synthesis of a new complementary
strand. The strands combine forming two pairs of DNA helix. The enzymes
are large molecules consisting entirely or mainly of protein. It is these
that act as catalysts for biochemical reactions. the shape of the enzyme
molecule determins the specific reaction that it catalyzes. A DNA molecule
is composed of four sub-units known as nucleotides. Each nucleotide consists
of 3 parts: a sugar called deoxyribose, a phosphate group and an organic
The sugar and phosphate groups form the backbone of the DNA helix, and
are the same for all nucleotides. Only the bases of the nucleotides differ
however, being either Adenine(A), Cytosine(C), Guanine(G), or Thymine(T).
If a spiral ladder analogy is used, the sides of the ladder are formed
by the alternating sugar and phosphate groups of the nucleotide. The rungs
of the ladder being the links between organic bases with A always linked
to T and C always linked to G. Because of the chemical structure of the
chemical bases, neither A nor T can combine with C or G. Therefore, should
the DNA unzip down the middle, each base would combine with its opposite
number from the free nucleotides floating freely in the nucleus. Each
molecule half would act as the template for the construction of a copy
- the process involved in creating RNA.
The cell is able to use this of sequenced data to manufacture the protein
molecules that it needs to function. Genetic information is described
by the sequences of the bases. The four bases, ACTG form the alphabet
and are arranged into words of three letters called condons. The resulting
64 possible combinations of sequenced data are used by the cell to manufacture
the protein molecules that a cell needs in order to function.
Keywords for animations: DNA, dna testing, molecule, dna, structure, alanine,
guanine, cytosine, thymine, uracyl, dna, phosphate, helix