MICB 202 Lecture Notes - Lecture 5: Teichoic Acid, Pie Chart, Gram-Negative Bacteria
Document Summary
Solar viruses in the ocean are very important to nutrient cycling. On the pie chart: infectious diseases and percentage of dalys accounted for them. Tuberculosis and pertussis are infection diseases caused only by bacteria . A species is composed of collection of strains of bacteria. Biological explanation not applicable: does not interbreed to produce fertile offspring. Not all strained species are genetically identical (i. e. not the same genotype) Major thing that distinguishes bacterium from eukaryotes is that the dna of the bacterium is in the cytoplasm . Nucleoid: region of dna in contact with cytoplasm. Made of glycan chain( covalently linked nam & nag sugars) and x-linking peptide. Gives the cell its shape: gram positive. Lots of layers of pg + proteins & teichoic acids. Teichoic acids: chains of negatively charged phosphorylated sugars anchored to pg or in membrane. Smooth surface of cell wall (covalent links: gram negative. A few layers of pg + an outer membrane.
