2.4.1 DNA notes

2.4.1 DNA notes - Nucleic Acids 2 types of nucleic acids 1....

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- 2 types of nucleic acids 1. DNA -- deoxyribonucleic acid Function – encodes genetic instructions that are translated into proteins of structure and function upon which all forms of life are based 2. RNA -- ribonucleic acid Function – helps translate the instructions on DNA - both made up of nucleotides Nucleotides - made up of three parts 1. phosphate group O HO P OH or OH 2. 5-carbon sugar - two kinds (a) ribose (RNA) (b) deoxyribose (DNA) 3. nitrogenous base - two kinds: (a) purines – double ring structures e.g.: adenine (A) guanine (G) (b) pyrimidines – single ring structures e.g.: cytosine (C) uracil (U) in RNA only thymine (T) in DNA only - nucleotide = phosphate group + deoxyribose + nitrogenous base Examples of Nucleotides in DNA DNA nucleotides differ only in the type of nitrogenous base present. (The phosphate group and the deoxyribose are the same in each.) There are 4 different nucleotides in DNA (one with A, one with C, one with G and one with T; each with a deoxyribose as their sugar). Note:
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2.4.1 DNA notes - Nucleic Acids 2 types of nucleic acids 1....

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