BIOL 200 Chapter Notes - Chapter 5: Ferredoxin, Ribulose, Rickettsia
Document Summary
Arise by division of pre-existing mitochondria chloroplasts (unlike most other organelles) Early 1900s with morphological similarity, suggested that they were symbiotic bacteria or cyanobacteria living within eukaryotic cells. Mid-1960s discovered that they contain dna and ribosomes and synthesize some of their own proteins. Strikingly similar to that of gram -ve bacteria. Inner membrane: permeability barrier (pm) contains proteins that transport specific ions or molecules. Om: relatively permeable to ions and small molecules (occurrence of proins) Mitochondria and chloroplasts lack pg wall between inner and om. Contain thylakoids (flattened membrane vesicles) like photosynthetic bacteria. Genome is located in stroma (cytoplasm) like bacteria. Genomic similarities of mitochondria and chloroplasts to bacteria. Mitochondria and chloroplasts have many bacteria-like properties (e. g. features of their genomes and protein synthesizing systems). Synthesize some of the components of the etc and photosynthetic system. Genes may include at least 23 trna genes, large and small ribosomal rnas, 5s rna (in plants)
