BIOL 2051 Study Guide - Midterm Guide: 16S Ribosomal Rna, Aldehyde, Membrane Lipids
Document Summary
Chapter 17- origins and evolution /&/ chapter 18- Phylogeny- study of evolutionary relationships of organisms. Comparison of rrna sequences can be used to determine the evolutionary relationships among organisms: ssu (small subunit) rrna sequencing of 16s or 18s is common. Feature: bacteria - prokaryotes, archaea - prokaryotes, eukarya. Protein cell wall protozoans lack a cell wall. 70s ribosomes but functionally similar to eukaryotes; Domain phylum class order family genus species. 16s ribosomal rna sequence difference of less than 5% are same genus: species 16s ribosomal rna sequence difference of less than 4% are same species. Nomenclature and bergey"s manual: binomial system of nomenclature: descriptive genus name and species epithet. The international code of nomenclature of bacteria regulates naming of prokaryotes. Formal recognition of a new prokaryotic species requires: Deposition of a sample of the organism in 2 international culture collections. Official publication of the new species name and description in international.
