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A tour of the cell
bio pack
18
Biology
Undergraduate 1
07/16/2011

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Term
light microscope LM
Definition
visible light is passed through the specimen and then through glass lenses
can magnify up to 1000 times actual size of specimen
Term
magnification
Definition
is the ratio of an objects image size
Term
resolution
Definition
is a measure of the clarity of the image
Term
in 1665
Definition
robert hooke first saw the cell walls
Term
antoni van leewenhoek
Definition
crafted lens to visualize living cells
Term
electron microscope EM
Definition
focuses a beam of electrons through the specimen or onto its surface
Term
scanning electron microscope SEM
Definition
is specially used for detailed study of the surface of a specimen
Term
Transmission electron microscope
Definition
is used to study the internal ultrastructure of cells
Term
cell fractionation
Definition
takes apart and separates the major organelles and other subcellular structures from one another
Term
prokaryotic
Definition
no nucleous
bacteria and archaea
Term
eukaryotic
Definition
cells containing nucleous
protist fungi animals and plants
Term
fimbrae
Definition
attachment stuctures on the surface of some prokaryotes
Term
nucleoid
Definition
region where the cell's DNA is located not enclosed in membrane proka.
Term
ribosomes
Definition
complexes that sythesize proteins
Term
plasma membrane
Definition
membrane enclosing the cytoplasm
Term
cell wall
Definition
rigid structure outside the plasma membrane
Term
capsule
Definition
jellylike outer coating of many prokaryotes
Term
flagela
Definition
locomotion organelles of some bacteria
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