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Concepts of DNA-proteins-gene

How are the concepts of DNA, proteins, gene and characteristics feature of living beings associated to each other?

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Characteristics feature of organisms depend on the chemical reactions which take place in them. These reactions are catalyzed through enzymes, hugely specific proteins. All protein of an organism is made up from information contained in the RNA molecules which are made up according to the template sequence of the nucleotides of the DNA chain. A gene is the DNA polynucleotide sequence which enfolds information for the production of the protein.

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