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10 terms

Lecture 15 Self-replicating molecules

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RNA world hypothesis
the idea that RNA systems self-replicated in previous ages and evolved into the current genetic duplication processes we have now
chemical natural selection
ribosome replication not accurate, select for ribosome variants that are better at linking nucleotides
Semi-autonomous organelles
mitochondria and chloroplasts; contains come of their own DNA, RNA, and ribosomes, reproduce in cells by fission, resemble free-living bacteria
Mitochondria
produce chemical energy from sugars and other compounds
chloropasts
in plants and some protists, site for energy production from sunlight
endosymbiont
theory for semi-autonomous organelles
symbiosis
organisms living together in direct and intimate contact
chromatin
strands of chromosomes
nucleolus
sites of rRNA synthesis, assembly of large & small ribosomal subunits
nuclear pore
active transport complex of many types of proteins