MCB 3020 Chapter Notes - Chapter 4: Isoprene, Cell Envelope, Cell Membrane
Document Summary
Chapter 4: archaeal cell structure: many features in common with eukarya. Genes encoding protein: replication, transcription, translation: features in common with bacteria. Genes for metabolism: other elements are unique to archaea. Capable of methanogenesis: highly diverse with respect to morphology, physiology, reproduction, and ecology, best known for growth in anaerobic, hypersaline, ph extremes, and high- temperature habitats, also found in marine arctic temperature and tropical waters. Archaeal size, shape, arrangement: much like bacteria, cocci and rods are common shapes, other shapes can also exist. Branched/flat shapes: sizes vary (typically 1-2 x 1-5 m for rods, 1-5 m in diameter for cocci, smallest observed is 0. 2 m in diameter, largest is a multicellular form that can reach 30 mm in length! S layer may be only component outside plasma membrane. Archaeal membranes: composed of unique lipids isoprene units (five carbon, branched)
