bio dna tb notes pg201

bio dna tb notes pg201 - Before a cell divides it copies...

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DNA Textbook Notes 1. The structure of DNA DNA is made of two strands of nucleotides twisted into the form of a double helix. Each nucleotide in DNA is made of the sugar deoxyribose, a phosphate group, and one of four nitrogenous bases (A, T, C, G). The two strands of DNA are complementary-each A on one strand pairs with T and C with G. Watson and Crick announced their discovery of the structure of DNA in 1953 with the help of data gathered by Wilkins, Franklin, and Chargaff. 2. The replication of DNA
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Unformatted text preview: Before a cell divides, it copies its DNA by a process called DNA replication. • In DNA replication, enzymes work to unwind and separate the double helix and add complementary nucleotides to the exposed strands., • The result of DNA replication is two exact copies of the cell's original DNA. Each new double helix is composed of one original DNA strand and one new DNA strand. • DNA polymerase proofreads DNA during its replication so that very few errors occur. 30 | P a g e Gautham – 11/19/09...
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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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