BIO130H1 Lecture 3: DNA, RNA, and Proteins (Jan. 18/16)
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BIO130H1 Full Course Notes
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Bio 130 - lecture 3 - dna, rna, and proteins. Scaffold for the base, where the base is connected. Many nitrogen atoms, but varies between the at/ucg. Forms the backbone of the polymer of dna. Nucleic acids can have 1, 2, 3 groups based on function. Thymine is in dna and uracil in rna. Thymine has an extra thymine group, while uracil lacks it. Mnemonic: pure things are good (purines: adenine & guanine) U c the pyramids (uracil & cytosine & thymine: pyrimidines. Dna is missing an oxygen on the 2" c, hence the name. Hydroxyl groups are very reactive, and bc rna has an extra, it"s more reactive. Rna is much more labile, meaning rna is much less stable at extremes. Okay because maybe we don"t it to stay for long. We want dna to stay longer, generally for stability. Base + sugar = nucleoside so this is a ribose nucleoside. It"s a nucleotide when phosphate groups are attached.