4_Cell_Structure - Eukaryotic Cell Structure and Function...

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1 Eukaryotic Cell Structure and Function © 2006: D. Julian Home Page Prokaryotes have no internal compartments Prokaryotic cells have a nucleoid region, where the DNA is located, but there are no internal structures or compartments that are surrounded by a membrane. Eukaryotic cells have many internal structures and compartments, known collectively as organelles. © 2006: D. Julian Overview of an animal cell Campbel and Reece, Fig. 6.9 © 2006: D. Julian
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2 Overview of a plant cell © 2006: D. Julian Campbel and Reece, Fig. 6.9 The nucleus The nucleus contains DNA in the form of chromatin . The nucleus is surrounded by a two- layered nuclear envelope that is perforated with nuclear pores . Ribosomes stud the outer surface of the nuclear envelope. © 2006: D. Julian Campbel and Reece, Fig. 6.10 Ribosomes Ribosomes are little protein synthesis engines. They can either be free within the cytosol, or they can be bound to the membranes of the nucleus and endoplasmic reticulum. © 2006: D. Julian Campbel and Reece, Fig. 6.11
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3 The endoplasmic reticulum (1) The ER is a system of interconnected tubules and flattened sacs (cisternae) that are continuous with the nucleus. ER manufactures membranes and proteins and performs other biosynthetic functions. © 2006: D. Julian Campbel and Reece, Fig. 6.12 The endoplasmic reticulum (2) Rough ER : Outer surface studded with ribosomes. Synthesizes proteins that will be secreted, proteins that will
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This note was uploaded on 04/12/2008 for the course BSC 2010 taught by Professor Bowes during the Spring '08 term at University of Florida.

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4_Cell_Structure - Eukaryotic Cell Structure and Function...

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