12/11/2023 0 Comments Dna stands for biology![]() ![]() Nucleotides are adjacently strung together through a phosphate backbone and are held together with their complements through hydrogen bonds. Nucleotides simply refer to nitrogenous bases, pentose sugar together with the phosphate backbone. Nucleic acids are the building blocks of all living organisms. ![]() DNA StructureĭNA is a nucleic acid, hinted at in the name. This part of the DNA story is a lot more complex than this, but we will end here for the purpose of this lesson. It is her work together with that of the above-mentioned Nobel Laureates that gave us the gold mine (DNA) that has led to advances in all fields of biology most notably, medicine. Rosalind Franklin captured the famous X-Ray imagery clearly showing its double helical nature. Later on (1869), Friedrich Miescher noted an acidic substance in the cell’s nuclei this substance was referred to as nuclein (we now know this as DNA). ![]() In 1866, Gregor Mendel first hypothesized the existence of inherited entities, now known as genes. However, its existence was known of before that. In 1962, Watson, Crick, and Wilkins obtained a Nobel Peace Prize for describing it. The discovery of the structure of DNA opened many avenues in the field of biology. Given how important this structure is, we will also talk about how it is replicated ( DNA replication), packaged, and how these can be exploited or used for DNA fingerprinting. After this, we will then dive into why DNA is so important. Different parts are under different selection pressures.īelow we will outline the history, structure of DNA, the differences and similarities between DNA and RNA. This extremely long double-stranded twisted string has parts that code for everything in all organisms. Two complementary strands of DNA are bonded to each other, and are twisted in a helical structure. These bases are connected to each other through chemical bonds. Simply put, DNA (Deoxyribonucleic Acid) is a string of nitrogenous bases (Adenine, Thymine, Guanine, and Cytosine) repeated over and over, and arranged in a seemingly random fashion. ![]()
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