Chapter 4 - Chapter 4-Cell Structure and Function Basics o...

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Chapter 4—Cell Structure and Function Basics o The cell is the smallest living unit. o Genetic material in cells is deoxyribonucleic acid (DNA). Stored in nucleus, mitochondria, and chloroplast (plants). o Prokaryotes: No nucleus or nuclear envelope Genetic material is in a “nucleoid region” No organelles or internal membranes o Eukaryotes: Nucleus with a nuclear envelope Genetic material within the nucleus Contains cytosol with membrane-bound organelles Eukaryotic Cell o Much more complex…. o Cytoplasm —the entire region inside the cell membrane and outside the nucleus in cells that have a nucleus (most eukaryotic cells). o The inside of the eukaryotic cell is compartmentalized into organelles . Organelles —one of several compartments suspended in the cytoplasm of eukaryotic cells. o Cellular Organelles —connected through the endomembrane system: Nucleus Endoplasmic reticulum Golgi complex Vesicles Mitochondrion Chloroplasts (in plants) Nucleus o The nucleus is the compartment that contains the cell’s genetic library. o It is a (usually) membrane-bound cellular organelle in eukaryotic cells. o The nucleus contains most of the genes that control the cell: Nuclear Envelope —double membrane which encloses the nucleus of a eukaryotic cell Nuclear Pore —holes in the membrane that allows things to enter and exit the nucleus Chromatin (DNA)
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This note was uploaded on 10/30/2011 for the course BIOLOGY 1001 taught by Professor Crousillac during the Summer '10 term at LSU.

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Chapter 4 - Chapter 4-Cell Structure and Function Basics o...

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