Module 3 (Archaeans) Flashcards
the shape of an archaeal cell
cocci, bacillus, flat, branched, some are pleomorphic-exhibits
the arrangement of archaeal cell
single, cocci-clusters, bacilli-chains
the smallest archaean
nanoarcaheum equitan
the biggest archaean
candidatus giganthauma karukerense
describe the plasma membrane of archaea
glycerol diether forms lipid bilayer; glycerol tetraethers forms lipid monolayer
the cell wall constituent
peptidoglycan is absent; consists s-layer polysaccharide or protein or both
what type of glycerol does an archaeal cell have
L-glycerol
describe the archaeal lipid
hydrocarbons are derived from isoprene units and it enables permeability and fluidity of the membrane
these links are more resistant to heat and chemical attack
ether links
these are the structures that compose the cell wall
protein sheath methanochondroitin pseudomurein single thick cell wall-gram positive like without a cell wall like structure
what is methanochondroitin
this is a polysaccharide the covers the s-layer
what is pseudomurein
peptidoglycan structure like
what composed the inclusions of an archaean
polyhydroxyalkanates, polyphospate granules, glycogen granules, and gas vacuoles
what are the rRNA components of a ribosome?
16s, 23s, 5s, 5.8s rRNAs
what makes the ribosome of an archaean different from that of a bacteria?
the addition of 5.8s rRNA
total ribosomal units
70s (30s and 50s)
describe the nucleoid of an archaean
circular and double stranded
contains 4-histone proteins
forms nucleosomes
describe the plasmids of an archaean
all are circular and double stranded
these are the external structures of an archaea
pili
hami
cannulae
describe the flagellum of an archaea
thinner than the bacteria
more than one flagellin unit
flagellum is not hollow
hooks are present but not all
how does the archaella rotate?
through atp hydrolysis
