Campbell Biology 9th - Unit 1
Subject:
Biology [1]
Tags:
Biology [2]
Membrane biology [3]
organelles [4]
Cell membrane [5]
Membrane protein [7]
Vesicle [8]
cell [9]
Biological membrane [11]
Lipid bilayer [12]
health [14]
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