PSYC 2000 Chapter : Psych Conscious Sep 17
Document Summary
All species amount of a=t and g=c but each species has its own ratio of at/gc. Model of how nucleotides combine to form a polymer. Dna replication involves making dna from dna (clicker) Dna replication occurs in a semi-conservative mechanism (clicker) Ultimately the information in dna is used to make proteins. Each pair is one purine double ring structure paired with pyrimidine single ring structure. Backbones are always held equal distance apart. Each of the new molecules consist of one original backbone plus a new one. Begins at many origins (doesn"t just start at one end and work to the other) Replication begins at the replication origin (up to 1,000 per dna molecule) Helicase (enzymes), topoisomerases, and ssb proteins (single strand binding proteins) Primase: now builds a short rna primer (~10 nucleotides) 5" to. Dna polymerase: enzymes now bind to the strand next to the primer and catalyzes the addition of new nucleotides, one by one.
