Replication of DNA is a critical event in a cell

Replication of DNA is a critical event in a cell - Dna to...

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Replication of DNA is a critical event in a cell’s life All cells come from pre-existing cells Cells reproduce by dividing in half Each of two daughter cells gets an exact copy of the parent cell’s genetic information Duplication of the parent cell DNA is called DNA replication Three ingredients for DNA replication: The parental DNA strands Free nucleotides A variety of enzymes that unwind the parental DNA double helix and synthesize new DNA strands The two resulting DNA molecules have one old parental strand and one new strand: this is called semiconservative replication dna helicase unzips dna Dna polomarse
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Unformatted text preview: Dna to rna is rna polomarse-mutations 5 types 1. Point mutations also called nucleotide substitutions involve changes to individual nucleotides in the DNA sequence (one base) Insertion mutations occur when one or more new nucleotide pairs are inserted into the DNA double helix Deletion mutations occur when one or more nucleotide pairs are removed from the double helix 4. An inversion occurs when a piece of DNA is cut out of a chromosome, turned around, and re-inserted into the gap A translocation occurs when a chunk of DNA (often very large) is removed from one chromosome and attached to another...
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