EXAM 3, hannah

EXAM 3, hannah - EXAM3...

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EXAM 3 03:58 Where did most of the mass of this tree come from? air Skim pages 325-350 Molecular basis of inheritance What is the structure of the genome? Chromosome and DNA structure How is the genome copied? DNA replication  What is the genome used for? Protein synthesis Chromosome Structure Eucaryotic chromosome structure DNA (linear molecule) Histone proteins DNA replication involves making what from DNA? DNA DNA replication occurs in a what mechanism? Semi-conservative
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Ultimately the information in DNA is used to make: Proteins DNA Structure Four nucleotides Complementary base pairing (hydrogen bonds) Double helix Anti parallel backbones How is DNA copied How do you make exact copies? What does the structure of DNA tell you about how to copy it? Replication Semi- Conservative – new molecules are the original strands, have built new back bone.  DNA replication Begins at many origins Strands must separate and unwind Helicase, Topoisomerases, and SSB proteins Add primer (told where to start) Primase- builds the primer DNA polymerase
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Replication (DNA polymerase_ Fuse section/fragments  DNA ligase Promase and DNA polymerase both build same way: 5’ to 3’ Anti- parallel  Leading strand dna synthesis would occur in locations: I and IV What happens if the wrong base is added? Dna polymer alters it, kick off Where does the energy come from? Nuclear tide cell, phosphate form, all bring energy with them Why does dna polymerase only build 5’ to 3’ Answer to previous questions Can errors in DNA be repaired after replication? Depends on what the errors are. Some can be repaired(ones on back bone) others can 
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This note was uploaded on 12/06/2011 for the course BIOL 1201 taught by Professor Wishtichusen during the Fall '07 term at LSU.

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EXAM 3, hannah - EXAM3...

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