DNA Replication - zip that opens and closes a bag DNA helicase is the enzyme that carries out DNA replication It looks at one side of base pairs

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DNA Replication The life of a eukaryotic cell is traditionally shown as a cycle. The cell cycle is a repeating sequence of cellular growth and division during the life of an organism. A cell spends 90 percent of its time in the first three phases of the cycle, called interphase. During the synthesis phase of the cell cycle, a cell’s DNA is copied. At the end of this phase, each chromosome consists of two chromatids attached at the centromere. There are two enzymes playing role in this phase: DNA helicase, and DNA polymerase. DNA helicase opens and closes (like a zip) the DNA, while DNA polymerase pairs the appropriate bases. DNA Replication Class Activity This directly relates to DNA replication, or the S phase of the cell cycle. An enzyme called DNA helicase opens the DNA, and another enzyme called DNA polymerase goes in and looks at what the bases are, and looks for their appropriate pair, and pairs them into a base pair. Then, DNA helicase closes the DNA so that nothing else can enter it and infect it. DNA helicase is like a
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Unformatted text preview: zip that opens and closes a bag. DNA helicase is the enzyme that carries out DNA replication. It looks at one side of base pairs and copying it into another DNA, and then it pairs it with another set of bases. Personal Reflection: | P a g e Gautham – 11/04/09 We did a fun activity in class about how DNA replicates. We now know and understand the roles of the two different types of enzymes (DNA helicase, and DNA polymerase). I think this activity was a good way to learn how DNA replicates and what the two different enzymes do. This is the second phase of the cell cycle (or the life cycle) and it’s called the Synthesis phase. DNA helicase opens and closes a DNA replication bubble/fork. I’m sure that there are many more things to learn about in DNA replication, as we have only spent one class on this. Atleast we got the basics and we know how this stage works in a nutshell. | P a g e Gautham – 11/04/09...
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This note was uploaded on 09/06/2011 for the course BIO 201 taught by Professor Mr.bajom during the Spring '09 term at Abu Dhabi University.

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DNA Replication - zip that opens and closes a bag DNA helicase is the enzyme that carries out DNA replication It looks at one side of base pairs

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