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Unformatted text preview: d) The two strands are joined together by hydrogen bonds that form between the bases 5) Hydrogen bonds form between specific bases a) A pairs with T b) G pairs with C c) The bonds in the sugar-phosphate backbone and between the bases cause the molecule to be twisted into a double helix 6) DNA replication a) Copying DNA i) DNA must be copied before a cell divides, so that the two new cells contain complete sets of the DNA (complete sets of the chromosomes) ii) If a cell doesnt contain a complete set of chromosomes, it cannot function properly b) The structure of DNA dictates a specific method of replication i) Complementary nucleotides are nucleotides that pair specifically with one another ii) The two DNA strands in a double helix are therefore complementary strands iii) The complementary strands are oriented in opposite directions c) Diagram of replication March 13, 2008 1. Drawing in notebook 2....
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- Spring '08