Eury: Methanogens

Question 1

methanogens oxygen requirements

Answer 1

obligate anaerobes

Question 2

cell of methanobacterium

Answer 2

pseudomurien

Question 3

cell of methanosarcina

Answer 3

methanochondroitin

Question 4

cell wall of methnocladococcus and methanoplanus

Answer 4

protein glycoprotein

Question 5

cell of methnaosprillum

Answer 5

s laye

Question 6

three pathways of methanogenesis

Answer 6

co2 reduction
acetoclastic
methylototrophic

Question 7

methane is produced ultimately by the reduction of

Answer 7

methyl CoM to methane

Question 8

3 common substrates used as the byproduct of fermentative respiration

Answer 8

• H2, CO2 and acetate

Question 9

e donor, substrate and process of C02 reduction

Answer 9

• H2,
• CO2, pyruvate
  -reduction

Question 10

explain the acetoclastic plathway

Answer 10

electrons are derived from this mutation of acetate
produces both carbon dioxide and methane as products
uses reductive acetyl CoA pathway to obtain carbon from methane

Question 11

what are the two pathways under methyl trophic pathway?

Answer 11

branch pathway - does not form dismutation

methylotrophic - require e donors H2 or formate for the reduction of methul groups

requires Acetate to assimilate Carbon from methane

Question 12

model for methanogen

Answer 12

methanacalfococcus jannashchii

Question 13

genome description of jannashchii

Answer 13

1.66 mbp
1700 genes
metabolic pathways - similar bacteria
transcription and translation - eukarya
-40% unique

Question 14

a hypethermophilic methanogen

Answer 14

methanopyrus

Question 15

found in the hydrothermal vents of submarine, chimney, walls of black smoker

Answer 15

methanopyrus

Question 16

how methnaopyrus produce methane

Answer 16

co2 and H2

Question 17

the highest temp to support growth of methnaoyrus

Answer 17

122C

Question 18

what makes the cell wall of methnaopyrus unique

Answer 18

• it has ether linked unstaturated from of biphytanyl tetraethers