List and expand the functions of DNA.
DNA performs the following functions:
1. Storage of hereditary information. Hereditary information in a DNA molecule lies in the nucleotide sequence of one of its chains. The smallest unit of genetic information is a triplet — three consecutively located in the nucleotide popinucleotide chain.
The sequence of triplets in the polynucleotide chain of a DNA molecule carries information about the sequence of amino acids in a protein molecule.
A group of successively arranged triplets that carries information about the structure of one protein molecule is called a gene.
2. The transmission of hereditary information from generation to generation is carried out as a result of reduplication (doubling of the DNA molecule) with the subsequent distribution of daughter molecules between daughter cells.
3. Transfer of hereditary information to informational RNA. In this case, DNA is a matrix. On one of the chains of the DNA molecule, according to the principle of complementarity, an information RNA molecule is synthesized, which then transfers information to the cytoplasm.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.