SEARCH
You are in browse mode. You must login to use MEMORY

   Log in to start

level: Archaea

Questions and Answers List

level questions: Archaea

QuestionAnswer
What types of lipids & bonds are specific to archaea ?isoprenoid ether lipids - so ether bonded
Some archaea form ... for their membranes instead of bilayersmonolayers (2 polar heads with 1 polar tail in between)
What is the type of molecule that makes of a monolayer called?Tetraether lipid / GDGT (4 ether bonds)
What is the type of molecule called that makes up a bilayer in archaeadiether lipid / archaeol
Crenarchaeol (GDGT with a cyclohexane ring) is specific for ... ?ammonium oxidizing thaumarchaeota
Isoprenoid ether lipids with low 13C contents are specific for ...methanotrophic archaea
Dietherlipid with a C25 isoprenoid chain may be specific for ...halophilic (salt loving) archaea
Crenarchaeota are ... and make ...hyperthermophyles - cyclopentane rings in their monolayer lipids (tetraether GDGTs-n)
euryarcheaota are for example .... and .... . How are their membranes structured?halophiles and methanogens . They have bilayers of archaeol or monolayers of GDGTs
how do we analyse tetraetherlipids?take off the head groups leaving the carbon skeleton and its rings to be analysed with GC-MS. LC-MS nowadays more suitable for larger molecules if soluble.
Ether bonds of archaea are very...strong and resitant to acids compared to ester bond
Covalently bonded monolayers are..stronger than bilayers
Non extremophiles can for example be found in...soils, lakes and peats
Thaumarchaeota are the ones making ...crenarchaeol - GDGT with 4 cyclopentanes and 1 cyclohexane
what is crenarchaeol a biomarker for?thaumarchaeota - ammonia oxidizing archaea (and so ammonia oxidation)
ammonium oxidation by thaumarcheaota uses ... and releases ...ammonia (NH3) to nitrite (NO2 -) (increases when thaumarchaeota bloom)
thaumarchaeota do not need, but are in competition for ...light, ammonia
crenarchaeols from thamarcheaota can be found up until and in the ...the cretaceous
crenarcheol hate.. . And why does this matter?free sulphite, causes them not to occur that much anymore at great depth (2000m)
Crenarcheol don't show 13C depletion of methane becausethey are in the nitrogen cycle not in methane cycle
occurrence in archae of GDGTs.yeh no question, just loook at it for a second
irregylar acyclic isoprenoids - characteristic for ? and because?methanogens & anaerobic oxidation of methane - depletion in 13C due to methane cycle - so archae involved in methane cycle