HSCI 100 Lecture Notes - Lecture 3: Noncoding Dna, Transfer Rna, Hydrophile
12 Sep 2018
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Document Summary
The cell & how to express a gene. Fundamental unit of living organisms: basic unit of life, all living things made up of cells, new cells arise from pre-existing cells. Lack a nucleus: represented by eubacteria and archaebacteria (the 2 major domains of life) Eukaryotic cells third domain of life: have a nucleus that houses dna genome, many membrane-bound organelles. Where did eukaryotic cells come from: endosymbiotic theory, mitochondria and chloroplast have their own dna. Separation of transcription & translation: has nucleus, organelles, cytoskeletal networks, endo & exocytosis, 10-100um, generally multicellular. Shared traits: membranes, ribosomes, dna, rna, proteins, enzymes, macromolecules. Cell membrane - receives info, imports & export of molecules, provides capacity for movement & expansion. Studded with proteins that move in 2d space - known as the fluid mosaic model: contains cholesterol for support (regulates how fluid membrane is, contains carbohydrate groups on proteins and lipids on the outer layer.
