Archaea

Question 0

Membrane lipids

Answer 0

Branched chain isoprenoids, linked to glycerol by ether linkages

Question 1

Differences -4

Answer 1

Cell wall never made from peptidoglycan
Unique membrane lipids
Most metabolic pathways are unique
But ribosomes and RNA polymerases like in eukaryotes

Question 2

Functional classification

Answer 2

Extreme halophiles
Methanogens
Hyperthermophiles

Question 3

Extreme halophiles

Answer 3

Aerobic
Live in brine ponds
Harvest light using pink pigment ( bacteriorhodoposin) which also exists in animal eyes

Question 4

Methanogens

Answer 4

Strictly anaerobic
Produce methane in their unique reaction
Intestines, sediments, waterlogged soils

Question 5

Hyperthermophiles

Answer 5

Often in highly acidic places

Generate energy from sulphur compounds

Question 6

Sequential classification

Answer 6

Euryarcheota (all but some hyperthermophiles)

Crenarcheota, korarcheota (rest of htphiles)