Chapter 4 - Biology Chapter 4 Cell Structure and Function...

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Biology Chapter 4: Cell Structure and Function Cell is the smallest living unit Genetic material in cells is DNA o In nucleus and mitochondria Prokaryotes o No nucleus o Genetic material in “nucleoid area” o No organelles or internal membranes Eukaryotes o Nucleus with nuclear envelope o Genetic material within nucleus o Contains cytosol with membrane bound organelles Nucleoid is a dense region of DNA in a prokaryotic cell Cytoplasm is the entire region inside the cell membrane and outside the nucleus Eukaryotes are much more complex o Inside compartmentalized into organelles One of several compartments suspended into organelles in the cytoplasm of Eukaryotic cells Some of cellular organelles Nucleus, endoplasmic reticulum, golgi complex, vesicles, mitochondrion, chloroplasts Nucleus is the compartment that contains the cell’s genetic library o Nucleus is a (usually) membrane bound cellular organelle in Eukaryotic cells o Contains most of genes that control cell Nuclear envelope is a double membrane which encloses the nucleus of a Eukaryotic cell
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