BIO 1130 Lecture Notes - Lecture 18: Nuclear Membrane, Bikont, Cell Membrane

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Archea, eubacteria, eukarya chart on slide 2. Archea are closely related to eukaryotes: sister group to eukaryotes. Founding bacteria was probably not an archean. Archea are almost impossible to grow and work with in a lab. Eukaryote autapomorphies: nuclear envelope, endomembrane system, mitochondria, multiple linear chromosomes and diploidy, centrosomes, these 5 things are characteristics of eukaryotes. Origin of the nuclear envelope: double plasma membrane surrounding nuclei, nuclear envelop two plasma membranes, eukaryote all about specialized regions. Endosymbiosis of bacterial cells: bacterial cell ingests surrounded by plasma membrane. Ability to produce atp through oxidative phosphorylation: has its own plasma membrane and membrane of what engulfed it, ended up in symbiotic relationship with other bacterial cell, end result is bacterium, symbiosis endosymbiosis. Mitochondria dna sequences used to develop evolution. Mitochondria are a maternal to dna lineages. One descending lineage the connects all bacteria. May be scattered lineages: photosynthetic bacteria. Eukaryote genetic recombination: meiosis and crossing over (chiasmata, huge amount of variation.