BLG 143 Study Guide - Final Guide: Cytoskeleton, Chromosome, Nucleolus
Document Summary
Cell structure: 2 broad groupings of life that fall into domains: prokaryotes: lack membrane-bound nucleus. Bacteria and archaea: eukaryotes: contain membrane-bound nucleus. Found in nucleoid: not separated by membrane. Allows it to t in the cell. * plasmids: circular, supercoiled dna molecules containing genes. Organelles: membrane-bound compartments inside cell that are specialized for a particular function such as. Holding crystals of magnetite which function like a compass. Containing enzymes involved in generating energy from ammonium ions. Cytoskeleton: responsible for hell"s shape, cell division, transportation of plasmids and organization of cell interior into distinctive regions. Composed of bres made of long polymers of globular proteins. Cytoplasm: all the contents of the cell interior. Flagella: tall-like structures on cell surface that spin around to move the cell. Cell wall: brous layer that surrounds plasma membrane. Large size make it dif cult for ions and small molecules to diffuse across cell. Groups enzymes and substrates together to increase ef ciency.