DNA codes for amino acids which will form proteins to build you . it takes 3 bases to code for an amino acid of which there are 20 this is called the tripet code but is also referred to at this level as a condon . Dna has a phosphate sugar backbone and is in the form of a double helix
Dna will not leave the nucleus , so there must be a messenger molecule to take it to be reproduced this is messanger Rna ( mRNA) RNA is a single stand of an acid and is copy of the DNA in as far as the RNA has the opposite bases as the DNA which as been copied so when they make a copy of the RNA ( which must have the right base pairs)you get a copy of the DNA ( does that make sense ... )
The mRNA will go out of the Neucleus and go into the cystoplasm and into the Ribosomes where it will be used to make proteins after it has been translated
rRNA is ribosomal RNA and is made in the nucleous of a cell and is used to make ribsomes when paired with Amino acids
tRNA is transfer RNA and is used transfer amino acids to a growing chain of polypeptides ( aka a protein)
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