BIO 12: UNIT 1 STUDY NOTES
- The 4 Nitrogenous Bases of DNA:
- Adenine bonding with Thymine
- Guanine bonding with Cytosine
- DNA Structure:
- DNA is a polymer composed of many simple units (monomers) of nucleotides which are composed of a sugar called deoxyribose, a phosphate group, and one of the four nitrogenous bases
- Complimentary base pairing for DNA means that A bonds with T and C bonds with G (this rule cannot be broken and AT/CG are thus considered "complimentary" pairs)
- DNA often takes the shape of a two-stranded double helix where anti-parallesim occurs in such that one side is different than the other (ex. one side starts with sugar and ends with phosphate but the other starts with phosphate and ends with sugar)
- Due to attractive forces, weak Hydrogen bonds (bonding) form the rungs or connectors of the nitrogenous base pairs
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