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How do mutations occur in dna ? i need it for my corsework in science need it This can occur naturally during DNA replication when an error occurs,
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When does DNA replication occur in a cell and why is it necessary? 2 answers. where does DNA replication occur? Posted 2008-11-10T00:11:59Z...
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This is the stage when DNA replication occurs. The G2 stage stands for "GAP 2". The M stage stands for "mitosis", and is when nuclear (chromosomes separate) and cytoplasmic (cytokinesis) division occur. Mitosis is further divided into 4 phases, which you will read about on the next page.
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As the cell grows and divides, it progresses through stages in the cell cycle; DNA replication occurs during the S phase (Synthesis phase).
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Biology Question: Where In The Cell Does DNA Replication Occur? DNA replication takes place in the nucleus. The replication process begins 5 to 10 hours...
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Biology Question: Why Does DNA Replication Occur? Before the cell splits during mitosis or meiosis. You need double the dna so there is an equal amount of...
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DNA replication is initiated at a region on a chromosome called an origin of replication. An enzyme called T-antigen (helicase) binds to the origin and unwinds the DNA in both directions from the origin.
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DNA Replication is Semiconservative Because DNA synthesis can only occur 5' to 3', a molecule of a second type of DNA polymerase (epsilon, ε, in eukaryotes) binds to the other template strand as the double helix opens. This molecule must synthesize discontinuous segments of polynucleotides (called Okazaki fragments).
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Their model also accounts for how DNA can replicate itself. They said the molecule “unzips” and new matching bases are added in to create two new molecules. They called this semiconservative replication because each new molecule has one “old” and one “new” strand of DNA.
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The primary difficulty with telomeres is the replication of the lagging strand. Because DNA synthesis requires a RNA template (that provides the free 3'-OH group) to prime DNA replication, and this template is eventually degraded, a short single-stranded region would be left at the end of the chromosome.
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