3.1 5 Domains ,kingdoms or both? Flashcards
Gel electrophoresis
patterns in DNA or RNA fragments are used as species identification
also comparsion in amino acid sequences of similar proteins in different species
varation in chromatography separate DNA and RNA fragments or proteins or amino acids according their size and charge
process
wells filled with solution contain fragments
agarose plate buffer
restriction enzymes used
move towards positive electrode shorter fragments move faster and therefore further than longer fragments
buffer solution
to maintain a constant pH
Reference
known DNA or RNA fragments,proteins or amino acids to aid identifcation
gel
contains dye that will bind to fragments and will fluoresce when placed under ub
dye
also added to DNA smaples does not bind to the DNA but moves through gel slightly faster than DNA so current can be switched off before all the samples run of the end
move towards
anode as negative charge on phosphate groups in the DNA
when used to identify and compare amino acids in a particular protein
dyes not added to gel or mixture
endosymbiotic theory mitochondria
cell engulf aerobic prokaryote as food
oxygen levels in atmosphere increase as photosynthetic prokaryotes appear
by chance in some cells some of the aerobic prokaryote is not digested .It uses oxygen for celluar respiration more efficent respiration allows cell to grow and reproduce more rapidly
aerobic prokaryotes become permanent feautures as mitochondira copies are mades and passed onto daughter cells during reproduction
Bacteria
peptidoglycan cell wall mebrane lipids ester linked unbranched 70s ribosomes plasmids 1 RNA polymerase can photosynthesise
Archea
membrane lipids ester linked branched
70s ribsomes
plasmids
1 RNA polymerase
eukaryotes
mebrane bound organelles ester linked unbranched mebrane lipids 80s ribosomes 3 RNA polymerase can phototsynthesie
archea and bacteria
very different genetics
Archea
replicate by binary fission controlled within a cell cule different from replicated of bacteria
5 kingdoms
prokaryotes=Monera ,animals,plants,fungi and protista (single celled organisms and algae)