Chapter 5 (2)

Chapter 5 (2) - Chapter 5 09/16/09 Cell structure and...

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Chapter 5 09/16/09 Cell structure and function Cell theory o All living things are composed of one or more cells o Smallest living things are single cells and cells are functional units in multi- cellular organisms o Cells come from preexisting cells What are the basic features of all cells? o Plasma membrane o DNA as hereditary recipe o Cytoplasm o Obtain energy and nutrients from the environment o Cells are small What are the features of prokaryotic cells? o Prokaryotic Smaller, 1-5 micro meters No membrane-bound organelles No nucleus DNA in circular loop Eubacteria and archaea What are the features of eukaryotic cells? o Eukaryotic Larger, 8-100 micro meters Membrane-bound organelles Nucleus DNA in linear chromosomes o Single-celled protists o The nucleus o Chromatin threads (chromosomes) o Nucleolus o Nuclear envelope o Pores Ribosomes o Site of protein synthewis o Made of RNA and protein
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Chapter 5 (2) - Chapter 5 09/16/09 Cell structure and...

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