September 11- ch 4

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

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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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