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Bio 111 DNAProtein synthesis

Bio 111 DNAProtein synthesis - Bio 111 DNA/Protein...

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Bio 111: DNA/Protein synthesis Concepts/Objectives Structure of DNA – DNA is taken from living organisms o Facts o Contents – phosphates, sugars, nitrogenous bases o Nitrogenous bases of 2 kinds 1. Large bases are A and G 2. Small bases are T and C o Chargaff’s rules – in DNA Large and small bases MUST line up A and T always go together C and G always go together o X-ray diffraction – helix – took pictures and saw that the DNA was in a double spiral or “helix Conclusions o Basic unit of measurement = nucleotide - of DNA sugar, phosphate, and nitrogen base o Two (DNA) strand – form a double “helix” o Nitrogenous bases complementary (hydrogen bonds) 1. A and T match – they form 3 hydrogen bonds 2. C and G match – they form 2 hydrogen bonds DNA Replication – when DNA makes copies o Possibilities : 3 ways 1. Conservative replication – leaves original DNA strand intact, forms a copy of two new strands with all of the new DNA base pairs 2. Semi conservative - produce two copies that each have one of the original DNA strands and one totally new DNA strand.
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