BIOL 212 Lecture Notes - Lecture 1: Nucleolus, Centriole, Mitochondrion
Document Summary
Most body"s cells are red blood cells. Majority by mass - fat cells & muscle cells. Leeuwonhoek (1683) - microscope w/ 300x magnification. 1838 - all organisms are composed of 1+ cells. 1839 - cells are structural and functional unit of life. 1855 - all cells arise from pre-existing cells by cell division. Needed to have cells fall into medium to grow more cells. Acquire matter & energy from environment, transform & use energy. Central dogma of molecular biology - flow of genetic information. Genome - is both coding & non-coding dna. C-value - dna content of a range of organisms. Based off of # of base pairs - haploid numbers. Peptide bond in protein synthesis - ribosomal rna (rrna) Rna splicing - self-splicing rna, small nuclear rnas. Diversity of cells: shapes of prokaryotic cells. Chain of spherical bacterial cells - streptococcus. Efficient nutrient exchange between the cell & environment are vital to cell survival.
