concept 6.2: many proteins work together in DNA replication and repair

what does resemblance of offspring to parents rely on

accurate replication of DNA prior to meiosis and its transmission to the next generation

what is DNA replication

the copying of DNA

what does resemblance of offspring to parents rely on

accurate replication of DNA prior to meiosis and its transmission to the next generation

what is DNA replication

the copying of DNA

what exactly occurs during DNA replication

the parent molecule unwinds, and two new daughter strands are build based on base-pairing rules

describe the semiconservative model of replication

when a double helix replicates, each daughter molecule will have one old strand (derived of “conserved” from the parent molecule) and one newly made strand

describe the conservative model of replication

the two strands split, and replicate, and the parent strand will return back to the other parent strand

describe the dispersive model of replication

each strand is a mix of parent and daughter molecule

what did the experiments by matthew meselson and franklin stahl support

their experiments supported the semiconservative model

describe the experiments done by Matthew Meselson and Franklin Stahl

They labeled the nucleotides of the old strands with a heavy isotope of nitrogen (N15), while any new nucleotides were labeled with a lighter isotope of nitrogen (N14). The first replication produced a band of hybrid DNA, eliminating the conservative model. The second replication produced both light and hybrid DNA, eliminating the dispersive model and supporting the semiconservative model

what would you equate a living cell to

a chemical factory where thousands of reactions occur