Several lines of molecular evidence support the endosymbiotic theory: 1.Mitochondria and chloroplasts contain DNA. 。 The genomes include rRNA,tRNA and certain proteins of the respiratory chain. 2.The eukaryotic nucleus contains bacterially derived genes. Some nuclear genes direct the activities of organelles,these genes more closely resembles counterparts from Bacteria. 3.Mitochondria and chloroplasts contain their own ribosomes. 。70 S in size. Chen Feng.Shanghai Jiao Tong University
Chen Feng, Shanghai Jiao Tong University Several lines of molecular evidence support the endosymbiotic theory: 1. Mitochondria and chloroplasts contain DNA. • The genomes include rRNA, tRNA and certain proteins of the respiratory chain. 2. The eukaryotic nucleus contains bacterially derived genes. • Some nuclear genes direct the activities of organelles, these genes more closely resembles counterparts from Bacteria. 3. Mitochondria and chloroplasts contain their own ribosomes. • 70S in size
Several lines of molecular evidence support the endosymbiotic theory: 4.Antibiotic specificity. Several antibiotics kill or inhibit Bacteria specifically by interfering with 70S ribosome.They also inhibit protein synthesis in mitochondria and chloroplasts. 5.Phylogenetic studies. Comparative rRNA sequencing methods and organellar genome studies have shown convincingly that the chloroplast and mitochondrion are closely related to Bacteria Chen Feng.Shanghai Jiao Tong University
Chen Feng, Shanghai Jiao Tong University Several lines of molecular evidence support the endosymbiotic theory: 4. Antibiotic specificity. • Several antibiotics kill or inhibit Bacteria specifically by interfering with 70S ribosome. They also inhibit protein synthesis in mitochondria and chloroplasts. 5. Phylogenetic studies. • Comparative rRNA sequencing methods and organellar genome studies have shown convincingly that the chloroplast and mitochondrion are closely related to Bacteria