BIO 141 Lecture Notes - Lecture 3: Serous Membrane, Secretion, Adipocyte

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7 Dec 2013
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Double membrane inner and outer i. outermembrane is continuous with er ii. Selectively permeable b. perinuclear cisterna fluid between membranes: nucleoli a. No membrane b. ribosomes subunits are assembled here i. Large in growing cells c. associated with chromatin region associated with dna coding for rrna i. Nuclear organizing regions (dna regions: chromatin dna + globular histone a. nucleosome fundamental unit of chromatin i. Units of eight wrapped by dna molecule: chromosomes: prior to cell division, chromatin condenses to form chromosomes. The cell cycle includes all events from a cell"s formation until it divides. S: synthetic phase; dna replicates: g2: brief period of growth where enzymes and other proteins necessary for division are synthesized i. Very brief: dna replication (do not need to know molecular events, cell division, mitosis and cytokinesis, characteristics of mitosis a. Daughter cells (2) are identical to mother cell b.

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