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Campbell Biology 9th - Unit 1

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Subject: 
Biology
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Tags: 
Biology
Membrane biology
organelles
Cell membrane
Endomembrane system
Membrane protein
Vesicle
cell
Endoplasmic reticulum
Biological membrane
Lipid bilayer
Facilitated diffusion
health

9/28/13 2:53 PM Tools used to study cells Microscopy Light microscope Electron microscope Scanning Transmission Cell fractionation - centrifuge Cells ? simplest collection of matter that can be alive All contain: Plasma membrane Cytosol Chromosomes Ribosomes Cytoplasm ? interior of cell Limited to small size because High SA to volume ration necessary for exchange between cell & environment As cells grow, volume increases at higher rate than SA Prokaryotic Lack nuclei and other membrane-enclosed organelles Nucleoid Location of DNA Not membrane enclosed Fimbriae Ribosomes Plasma membrane Cell wall Capsule Flagella Surface to volume ratio is important parameter affecting cell size & shape ORGANELLES IN EUKARYOTIC CELL Nucleus Functions: Houses chromosomes

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