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Semiconservative replication
method in which DNA replicates. parent DNA splits into 2 daughter strands. 2 daughter strands add new strand
Origin of replication
many places where DNA unwinds creating relication forks
Helicase
the enzyme that unwinds the DNA helix generating single strand regions of DNA
SSB
single-strand binding protein goes where helicase has been to keep the 2 strands from reconnecting
DNA gyrase
enzyme, topiosomerase releives strand strain (supercoil)
DNA polymerase
A DNA polymerase is an enzyme that helps catalyze in the polymerization of deoxyribonucleotides into a DNA strand.
Primase
a RNA polymerase primase-> generates RNA-> primer
RNA Primer
indicates to DNA polymerase where to start.
DNA
dounble stranded sugar=deoxyribose Bas paring: A/T, G/C found in nucleus only
RNA
single stranded sugar=ribose base paring: A/U, G/C found in nucleus and cytoplasm
mRNA
created in transiption carries genetic message from nucles to cytoplasm eukaryotes= monocistronic: mRNA trnaslates into only one product prokaryotes= polycitronic: mRNA different proteins can be formed by starting different position on the mRNA
tRNA
transfer RNA found in cytoplasm links amino acids into the polypeptide chain. different tRNA for each a.a
rRNA
ribosomal RNA sunthesized in nucleolous becomes intergral part of ribsomes complex
hnRNA
precursor to mRNA
DNA ligase
joins the okazaki fragments of teh lagging strand

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