what is dna ? and it's str. also give function

Hello,

DNA (Deoxyribonucleic Acid) is a molecule that contains the genetic instructions used in the development, functioning, growth, and reproduction of all known living organisms and many viruses. It is often described as the blueprint of life.

DNA consists of two long chains of nucleotides twisted into a double helix structure. Each nucleotide contains a sugar molecule (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), guanine (G), cytosine (C), or thymine (T). The structure of DNA forms a ladder-like double helix, with the nitrogenous bases pairing in a complementary manner (A with T and G with C) and the sugar-phosphate backbone forming the sides of the ladder.

The primary function of DNA is to store and transmit genetic information. It serves as the hereditary material passed from parents to offspring, containing instructions for the synthesis of proteins and the regulation of cellular activities. DNA also plays a crucial role in processes such as DNA replication, transcription (the synthesis of RNA from DNA), and translation (the synthesis of proteins from RNA).

Additionally, DNA is involved in the regulation of gene expression, cell differentiation, and various other biological processes essential for the development and maintenance of living organisms.

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