BIO120H1 Chapter 1: Chapter 1.docx
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BIO120H1 Full Course Notes
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Most single celled organism, but other like us multicellular. All cells store their hereditary info in the same linear chemical code called dna. Dna is long, double stranded, unbranched polymer chains. All cells replicate their hereditary information by template polymerization. Dna consists of multiple chunks of the following: Sugar called deoxyribose that has phosphate attached + base(atcg). Dna synthesized by the creation of a complementary strand to fit half of the double strand, called the template strand. Bonds betweeb base pairs weaker than the sugar phosphate links, which allows for pulling apart of strand without damaging phosphate backbone. Summary; dna is information store, template polymerization is way info is copied. All cells transcribe portions of hereditary info into intermediary form rna. Dna is instruction, in transcription, instruction of dna guide to the synthesis of rna. Rna, then is also a form of instruction for the creation of proteins, a process called translation.