34.30, 34.33 Homo sapien 100,000 years fig. Single Cell, but No Nucleus, No Organelles 1. DNA, transcription to RNA via RNA polymerase, translation to protein via tRNAs and ribosomes 3. Many metabolic pathways, photosynthesis, glycolosis 5. RNA - ribozymes 4.
Concentration increases probability of reaction.
2 O as e - doner. Liberate O 2 . Evolved 2.5-3.4 billion years ago. Rust appears in rocks 2 billion years ago. Drove some organisms into anaerobic enviornments.