GENE20001 Lecture Notes - Lecture 9: Transfer Rna, Intron, Ribosomal Rna
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* most, (cid:271)ut (cid:374)ot all of the dna i(cid:374) a (cid:272)ell is i(cid:374) the (cid:374)u(cid:272)leus a(cid:374)d is i(cid:374)herited a(cid:272)(cid:272)ordi(cid:374)g to me(cid:374)del"s law. * dna (encoding genes) is found within organelles in the cytoplasm mitochondria & chloroplasts (or plastids) a(cid:374)d (cid:272)a(cid:374) (cid:271)e i(cid:374)herited fro(cid:373) pare(cid:374)t to proge(cid:374)y (cid:271)ut does (cid:374)ot follow me(cid:374)del"s law. * mitochondria generate atp by oxidative phosphorylation. * chloroplasts present in plants and other photosynthetic organisms. In leaves fix carbon through photosynthesis. Note: non-green chloroplasts occur in most plant cells and are called plastids chloroplasts are not only found in green leaves but all the cells of a plant. * nucleoids structures within organelles that contain dna. * nucleoids are sensitive to dnase treatment can abolish nucleoids. * mitochondria and chloroplasts have their own genome contained within nucleoids. Chloroplasts first shown to contain dna in 1962. First sequence determined in 1986 (tobacco & liverwort)
