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September 11- ch 4 - • All cells use common building...

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September 11, 2007 Chapter 4 Cell theory All living things are made of cells Smallest living things are unicellular Cells can only come from other cells Most cells are small, ranging from 1 to 100 micrometers Common things Plasma membranes Cytoplasm o Fluid interior where a cell’s metabolic reactions occur o Contains organells DNA (deoxyribosenucleic acid) RNA (ribosenucleic acid) Obtain energy and nutrients from the environment
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Unformatted text preview: • All cells use common building blocks to build the molecules of life o Amino acids (20 of them) Cells are: • Prokaryotic o No nucleus • Eukaryotic o Has nucleus Eukaryotic • Typically larger • Cell walls • Cytoskeleton • Cilia and flagella • Nucleus as control center • Vacuoles • Mitochondria and chloroplast • Plastids (in plants) Prokaryotic •...
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