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Biology Chapter 3

Cells

TermDefinition
3 basic parts of cell theory Cells are the basic unit of life All organisms are comprised of one or more cells Cells only arise from other cells
Prokaryotes without organelles - archaea and bacteria
Eukaryotes with organelles - Domain Eukarya
Plasma membrane a semipermeable membrane that surrounds all cells
Cytoplasm Interior of the cell
Ribosome a two-part structure in all cells where proteins are synthesized
Nucleoid location of the DNA in a prokaryotic cell
Cell wall provides support and protection to a prokaryotic cell, very hydrophilic
Pathogen an organism that causes disease
Capsule highly-organized polysaccharide, provides additional protection to prokaryotes
Fimbriae short, hair-like protein structures on a prokaryote, act as a means of attachment
Flagellum a slender protein structure used by many cells to move around
6 components to a flagellum export apparatus basal body/stators hook junction zone filament cap
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