Cell

Only available on StudyMode
  • Download(s) : 169
  • Published : December 10, 2012
Open Document
Text Preview
p.92\
a.1 Eukaryotic Cell vs Prokaryotic Cell
All cells can be classfied into prokaryotes and eukaryotes. Prokaryotes were the only form of life on Earth for millions of years until more complicated eukaryotic cells came into being through the process of evolution. Comparison chart

All attributes  Differences Similarities
| Eukaryotic Cell| Prokaryotic Cell|
Nucleus:| Present| Absent|
Number of chromosomes:| More than one| One--but not true chromosome: Plasmids| Cell Type:| Multicellular| Unicellular|
True Membrane bound Nucleus:| Present| Absent|
Example:| Animals and Plants| Bacteria and Archaea|
Telomeres:| Present (Linear DNA)| Circular DNA doesn't need telemeres| Genetic Recombination:| Mitosis and fusion of gametes| Partial, undirectional transfers DNA| Lysosomes and peroxisomes:| Present| Absent|

Microtubules:| Present| Absent or rare|
Endoplasmic reticulum:| Present| Absent|
Mitochondria:| Present| Absent|
Cytoskeleton:| Present| May be absent|
DNA wrapping on proteins.:| Yes| No|
Ribosomes:| larger| smaller|
Vesicles:| Present| Present|
Golgi apparatus:| Present| Absent|
Mitosis:| Yes| No---but has binary fission|
Chloroplasts:| Present (in plants)| Absent; chlorophyll scattered in the cytoplasm| Flagella:| Microscopic in size; membrane bound; usually arranged as nine doublets surrounding two singlets| Submicroscopic in size, composed of only one fiber| Permeability of Nuclear Membrane:| Selective| not present| Plasma membrane with steriod:| Yes| Usually no|

Cell wall:| Only in plant cells (chemically simpler)| Usually chemically complexed| Vacuoles:| Present| Present|
Cell size:| 10-100um| 1-10um|
Definition of eukaryotes and prokaryotes
Prokaryotes (pro-KAR-ee-ot-es) (from Old Greek pro- before + karyon nut or kernel, referring to the cell nucleus, + suffix -otos, pl. -otes; also spelled "procaryotes") are organisms without a cell...
tracking img