2.8 Flashcards
bacteria, archaea, eukarya evolutionary relationship
archaea shares more recent common ancestor
what is similar b/w archaea and eukarya
DNA related bbiology and processes
what is the same between the domain’s cell membranes
the molecules are ester linked
difference in domains lipids
bac/ euk : fatty acids
archaea: isoprenoid
what do archaea lipids contain
side branches and rings–> stability
what do some archaea produce for cell membrane
-transmembrane phospholipids
-lipid monolayer similar to bilayer but the tails are joined
what is the archaeal membrane thought to be important in?
surviving harsh environmments
What do most archaea have for cell wall
what about the other
-s layers
-some have proteinaceaous or carbohydrate
-some lack cell walls
-some have second membrane
what are archaeal cell walls made of
pseudomurein
pseudomurein
lacks D amino acids, has different sugar linkage, and MurNAc replaced w N acytltalosainuronic acid
unique archaeal appendages
hamus
hamus
fix cell to surgace or to other cells to mediate biofilm mormation
“grapling hook”
how do archaea swim
use functionally and evolutionarily distinct flaggellum like apparatus
What is different from the archaea “flagella” and the bacteria flagella
simpler, fewer proteins and driven by ATP hydrolysis
how is archaeal filament different from fagellum filament
built from inside out
related to type IV pilus
