Ch_04 - Lifes Home The Cell Cells Are the Working Units of...

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Life’s Home The Cell Cells Are the Working Units of Life Specialization, complexity. Review of Metric System (mm nm). Every form of life is a cell, or is composed of cells, and every cell came from a cell. All cells have: plasma membrane, cytoplasm, and genetic material (DNA). Two main cell types differ mainly in where that DNA is kept. Prokaryotic versus Eukaryotic Cells Prokaryotic. Before the nucleus . Includes bacteria and archaea. DNA localized to a nucleoid region, not in membrane-enclosed compartments called organelles. Small size, usually single-celled, don t need oxygen. Prokaryotic versus Eukaryotic Cells Eukaryotic. True nucleus . Includes all other kingdoms: animals, plants, fungi, and protists. DNA enclosed in membrane, along with other organelles. Multicellular and single-celled, larger size, use oxygen.
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Eukaryotic Cells Five main components of eukaryotic cells include nucleus, organelles, cytosol, cytoskeleton, and
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Ch_04 - Lifes Home The Cell Cells Are the Working Units of...

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