BIOL 116 Lecture Notes - Lecture 3: Dynein, Archaea, Nucleoid
2 Dec 2016
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7. 1 bacterial and archaeal cell structures & functions. For dna to fit, coils itself with the aid of enzymes to form a supercoiled structure. Plasmids contain genes but are independent of the main chromosome. Contain enzymes and pigment molecules required for these reactions. Long thin fibers serving structural role inside cell. Surface appendages that help to stick to surfaces. Cell wall forms an exoskeleton ( glycolipid layer) Hypertonic to surrounding environment - need a stiff wall to resist the pressure from osmosis. Bacterial and archaeal walls are tough, fibrous layer that surrounds the plasma membrane. Synthesize proteins inserted into plasma membrane, secreted, or shipped elsewhere. Lumen - interior of er, proteins undergo folding. Polarity cis faces rough er trans faces plasma membrane. Membranous vesicles carry materials to and from organelle cis trans. Have large and mall subunits (rna + protein) Proteins synthesized on free ribosomes are present in the cytosol.
