[BIO130H1] - Final Exam Guide - Ultimate 33 pages long Study Guide!
ash-mr18 and 40043 others unlocked
31
BIO130H1 Full Course Notes
Verified Note
31 documents
Document Summary
Topic 1: introduction to cells, diversity and nucleic acids. Cell theory: all organisms are comprised of one or more cells, the cell is the basis organizational unit of life, all cells arise from pre-existing cells (heredity is essential to definition + longevity of life) Two main types of cells: prokaryotic cells, no nuclei. There is no distinct compartment for the dna: primarily single celled (mostly). Although they are single celled, they live in communities, but are not multicellular. 500-6000 genes: two categories: eubacteria and archea, eukaryotic cells, have nuclei, single-celled or multicellular. Tend to be much more complex than prokaryotes. Ribosomes are free floating + not attached to any membrane system. Due tend to have dna in non-membrane bound nucleoid (free-flowing nucleoid) Capsule polysaccharide layer for protection from engulfment. (optional, not in all prokaryotes) Cell wall for general protection (optional) Dna in nucleoid compact structure of dna in nucleoid region. Bacterial flagellum for moving and locomotion (optional)