NATS 1690 Lecture Notes - Lecture 7: Transfer Rna, Homeostasis, Intron
12 Feb 2017
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Document Summary
Genetic material must be able to pass from parent to o spring and from cell to cell during cell division. Dna and rna are the two nucleic acids that store info. Dna is a double helix, base-pairs form steps a-t, c-g. Rosalind franklin made x-ray studies on dna and that gave her the size and its helical shape. Watson and crick with maurice wilkins proposed that dan is a double helix. They proposed it was 2 joined strands of nucleotides, stabilized with hydrogen binding with a sugar phosphate backbone. The sugar phosphates is on the outside, dan backbone has a negative charge, base stacking contributes to the stability, each base on each strand is paired to a base on the other strand. A g-c pair is stabilized by 3 hydrogen bongs. An a - t pair is stabilized by 2. Base pairing ensures that two strands are complementary and this is necessary for dan replication and transcription.
