Cellular organization-2

Cellular organization-2 - J. Voltzow Cellular Organization...

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J. Voltzow Cellular Organization Organelle Size range Structure Function nucleus 5 μm in diameter Two membranes separated by a space of 20-40 nm Envelope is perforated by pore structures 100 nm in diameter Nuclear envelope: encloses the nucleus, separating its contents. It is a double membrane Nuclear side of the envelope is lined by the nuclear lamina. Nuclear matrix, a framework of fibers extending throughout the nuclear interior Nucleolus DNA organized into discrete units – chromosomes, carry the genetic information Nucleolus- RNA is synthesized from instructions of the DNA. Proteins imported from eh cytoplasm are assembled with rRNA into large and small ribosomal subunits Contains most of the genes in the eukaryotic cell ribosomes .5 μm Made of ribosomal RNA and protein Protein Factories Protein synthesis Build proteins in two cytoplasmic locales rough endoplasmic reticulum Ribosomes on the outer surface of the membrane and appears rought Most secretory proteins- glycoprotesins
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This note was uploaded on 07/29/2011 for the course BIO 141 taught by Professor Voltzow during the Fall '10 term at Scranton.

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Cellular organization-2 - J. Voltzow Cellular Organization...

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