Transcription of DNA replication in 7 easy steps - BIOLOGY FOR LIFE
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DNA replication in 7 easy steps - BIOLOGY FOR LIFE
DNA replication in 7 easy steps 1. Helicase enzyme breaks hydrogen bonds between bases, unzips and unwinds the helix A protein that catalyzes chemical reactions. Helicase begins to unwind the DNA at the ORIGIN OF replication (a specific DNA nucleotide sequence) It s common to only show one strands sequence of bases, since the other can be inferred. Helicase enzymes move in both directions from the Point of Origin, forming a replication BUBBLE. At either end of the replication bubble is a replication FORK, a Y-shaped region where the new strands of DNA are elongating. In prokaryotic cells there is one origin In eukaryotic cells there are 100 s to 1000 s of origins 1 2 3 4 What does it really look like? BILL: define terms related to step 1 Origin of replication Helicase Single strand binding proteins DNA polymerase III Enzyme 3 end Nucleotides Primase Primer Deoxyribonoucleotides Antiparallel replication fork Leading strand Lagging strand Okazaki fragment DNA polymerase I DNA ligase 2.
the ORIGIN OF REPLICATION (a specific DNA nucleotide sequence) It’s common to only show one strands sequence of ... At either end of the replication bubble is a REPLICATION FORK, a Y-shaped region where the new strands of DNA are elongating. In prokaryotic cells there is one origin In eukaryotic cells there are 100’s to 1000’s of origins ...
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