BIO 116 Study Guide - Spring 2018, Comprehensive Midterm Notes - Vascular Bundle, Transfer Rna, Spliceosome
Document Summary
C3- typical plants , c4- bundle sheath cells(spatial separation of photosynthesis because to avoid photorespiration( fixing o2 instead of carbon) rubisco fixes carbon. C stands for carboxylase, o is for oxygenase. Conservative: meselson and stahl: n isotopes --- 15n(heavy) and 14n(light). Lots of nitrogen in dna, rna, and protein. Then moved cells to another medium that had n14. it says dna is replicated first with heavy dna, then after one replicate, old heavy dna comes back and new light dna sticks together. Then another replication-- 1 is all old, 2 is all new, 3 and 4 is all new/light. Semiconservative: half and half, one new one old for each copy, then after replication. 1 is half and half 2 is all new, 3 is half and half 4 is all new. Enhancers: all cells have same genome, all cell tissue have different functions and structures. Act like this is what genes get switched on and off.
