Base Sequence
The order of bases (A, T, C and G) that carry the code
In molecular biology, the base sequence or nucleotide sequence refers to the specific order of nucleotides (adenine, cytosine, guanine, and thymine) within a DNA or RNA molecule. The nucleotides are the building blocks of DNA and RNA and they determine the genetic information carried by these molecules. The sequence of these nucleotides in a DNA molecule determines the sequence of amino acids in a protein, which ultimately determines the phenotype or physical characteristics of an organism.
The base sequence is usually represented by a string of the four letters that correspond to the four nucleotides, with each letter indicating the position of a specific nucleotide in the sequence. For example, the sequence of a DNA molecule might be represented as ATCGATCGT, with each letter representing a specific nucleotide (adenine, thymine, cytosine, and guanine, respectively).
The base sequence is important in genetic analysis because it can reveal information about genetic variation and evolution. By comparing the sequence of DNA molecules from different organisms, scientists can explore the relationships between different species and understand how they have evolved over time. Additionally, the base sequence can help identify mutations that are associated with diseases or other genetic disorders, which can aid in the diagnosis and treatment of these conditions.
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