Garrod’s work on inborn errors of metabolism provide evidence that genes specify proteins.
A gene is that the basic physical and practical unit of heredity. Genes ar created from polymer. Some genes act as directions to create molecules referred to as proteins. However, several genes don't code for proteins. In humans, genes vary in size from many hundred polymer bases to over two million bases.
Each protein is coded for by a gene, that is often lots of or thousands of base pairs long. the data within the gene specifies the order within which the amino acids are assembled into the protein. The journey from gene to protein is complicated and tightly controlled among every cell.
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