DNA replication Flashcards
DNA replication overview
a cell duplicating its DNA before cell division, ensuring that each daughter cell receives an exact copy of the genetic material
what type of a process is DNA replication
semi-conservative
semi- conservative
each daughter DNA molecule consists of one parental strand and one newly synthesized strand
DNA replication definition
the biological process of producing 2 identical replicas of DNA from one original DNA molecule
3 theories of DNA replication
- semi-conservative
- conservative
- dispersive
step 1 of DNA replication
- DNA strands unzip and is catalyzed by DNA helicase.
- hydrogen bonds between the complementary base pairs are broken
step 2
the 2 separate stands of DNA act as a template for the synthesis of the new DNA stand
step 3
free nucleotides in the nucleus pair up (complementary base pair) on the template stand and form hydrogen bonds
step 4
adjacent nucleotides act together via. condensation reaction to form phosphodiester bonds
- catalyzed by DNA polymerase
step 5
DNA polymerase moves along the stand, catalyzing the formation of the bonds
step 6
the 2 DNA molecules twist and form a double helix