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Lecture

Lecture #4: DNA Structure and Replication

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Department
Biological Sciences
Course
BISC 101
Professor
Christopher Kennedy
Semester
Winter

Description
Lecture 4 DNA Structure and ReplicationDeoxyribonucleic acidGenetic material males up traits of an individual speciesPassed on to next generationIn nucleus StructureFIG 165Sugar deoxyriboseNitrogen basePhosphate group 30 each A T20 each G CAG are purinesT C are pyrimidineFIG 168Watson Crick 1953DNA structure revealedDouble helix two DNA strandsFIG 165 168 167DNA ReplicationSemi conservative model2 strands separate each strand serves as a template to produce a complementary strandFIG 169 and FIG 527Details of Replication1Origins of replicationaSpecific DNA sequencebProteins attachcauses strands to separateDNA polymerase adds new nucleotidesFIG 1612Energy for replicationNucleotides occur as triphosphates 3PO4 2PO4 are release energy is produced
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