BIO 106 Lecture Notes - Lecture 1: Actin, Nucleolus, Archaea
17 Sep 2016
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Document Summary
All living organisms are comprised of cells. Called chambers inside of cork cells (came up with the word cell) Discovery of protozoa and bacteria: important techniques. 1nm = 10-9 m: minimum resolvable by electron microscope, 200 nm minimum resolvable by light microscope, 0. 2 mm minimum resolvable by naked eye. Transmission electron microscope (tem: a beam of electrons passes through a thin slice of a sample the very short wavelength of the electron compared to light. Basic unit from which all living organisms are made. Controlled by genes (dna) which code for proteins that build specific structures and carry out specific functions. Forms chemical energy for processes that require it. Presence of internal membrane compartments: none = prokaryotes, organelles = eukaryotes. Has a double membrane with pores: pores regulate movement of molecule entry and exit. Important to concentrate molecules to efficiently carry out their functions. Contains one or more nucleoli (site of ribosome synthesis) Dna: all info in 46 chromosomes.
