BIO DNA - Zak Murdock Period 1 Video Questions 1 Each...

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Zak Murdock Period 1 Video Questions 1) Each nucleotide of DNA consists of a molecule of the sugar deoxyribose, a phosphate group, and a nitrogen-containing base. The only difference between the nucleotides of DNA is each contains one of four bases: adenine, cytosine, thymine, or guanine. In nucleotides the amount of adenine equals the amount of thymine and the amount of guanine equals the amount of cytosine. DNA is a double-stranded helix in which the strands are antiparallel and the bases are held together by hydrogen bonding. In order for the DNA molecule to be constructed the nucleotides have to be linked together in a specific manner. The sugar- phosphate “back bones” of the polynucleotide chains coil around the outside of the helix. Therefore the nitrogenous bases point towards the center. The two chains are then held together through nitrogen bonding between specifically paired bases. Every base pair consists of one purine and one pyrimidine. Due to the fact that AT and GC pairs have equal lengths and fit identically into the double helix, the diameter of the helix is uniform. The base pairs are flat and their stacking in the center of the molecule is stabilized by hydrophobic interactions,
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BIO DNA - Zak Murdock Period 1 Video Questions 1 Each...

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