BIOL 1210 Study Guide - Final Guide: Okazaki Fragments, Sister Chromatids, Photosystem I
18 Dec 2016
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2 days missed, 100% for attendance, clickers boost attendance. Dark reactions in the stroma, light in the thylakoid membranes. First photosystem (photosystem 2) splits oxygen to replace electron, second photosystem (photosystem 1) creates nadph with lost electron. H+ dense inside the thylakoid due to electron transport chain between photosystems. Heterozygous cross: 75%, 25%; heterozygous with recessive: 1:1:1. Variations on mendel"s principles: - sex linkage - chromosomal linkage. Incomplete dominance - codominance - multiple alleles. Meiosis i (prophase 1): synapsis, homologous chromosomes line up and homologs cross over (exchange segments) After replication 2 sister chromatids, before 1 chromatid per parental genome. Polymerase makes new strand 5" to 3" direction (reads 3" to 5") so leading strand is 5" - 3" and lagging is 3" - 5" Lagging strand is replicated in fragments called okazaki. Leading and lagging strands are not parental (new, synthesized strands) Helicase creates replication bubbles and replication forks (y shaped part of parental dna strands)
