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A mutation is a change in the DNA sequence that can affect the structure or function of an organism.
deoxyribonucleic acid (DNA)
Its composition and physical structure - this is determined by the DNA/RNA that coded for it.
The double helix structure of DNA allows it to store genetic information by pairing nucleotide bases in a complementary manner. The order of these bases along the DNA molecule encodes the genetic instructions necessary for the development and function of living organisms. This structure enables DNA to pass on hereditary traits and provide a blueprint for protein synthesis and cellular activities.
Carrying the genetic code and determining an organism's structure and function are functions of DNA. DNA contains the genetic instructions necessary for the growth, development, functioning, and reproduction of all living organisms. RNA is involved in translating these genetic instructions to produce proteins.