BIO 1140 Lecture Notes - Lecture 1: Ribosomal Rna, Robert Hooke, Epithelium
17 Jun 2016
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Understand different types of microscopy and their requirements for use in cell biology. Robert hooke built the first microscope; viewed cork and thought it looked like cubicles (cellulae=cells) All organisms are composed of one or more cells. Cells arise only from division of pre-existing cells. The cell is the basic structural and functional unit of all living organisms. All cells have a cell membrane; it may not be identical but its similar. Cells can remain individual or assemble together to form functional tissues and organs. (connective tissue, epithelial tissue, muscle tissues, and nervous tissue). These tissues use gap junctions and cytokines (chemical messenger that travels to other cells) to intercommunicate. Prokaryotes (bacteria, archaea); eukaryotes (eukarya: animals, plants, fungi) Ribosomal rna was probably the first macromolecule of life, luca. Every living organism needs to make protein therefore have ribosomes (made of ribosomal rna and protein).
