BISC 100 Chapter Notes - Chapter 10: Thymine, Deoxyribose
6 Jul 2014
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Document Summary
The result is a sugar phosphate backbone: each nucleotide consists of a nitrogenous base, a sugar (5 carbons called a deoxyribose) and a phosphate group, the 4 nucleotides in dna differ only in their nitrogenous bases, the bases can be divided into two types: thymine (t) and cytosine (c) are single ring structures and are pyrimidine and adenine (a) and guanine (g) are larger double ring structures and are purines. Dna replication: when a cell or whole organism reproduces a complete set of genetic instructions must pass from one generation to the next, the dna strand serves as a model or template for reproduction of the other strand, dna polymerase = the enzyme that makes the covalent bonds between the, dna replication begins at specific sites called origins of replication, the parental strand opens up as daughter stands elongate on both sides of the nucleotides of a new dna strand bubble, dna helicase unwind the dna.
