Topic 12

Question 1

What are crenarchaea?

Answer 1

phyla that contains organisms that grow in a wide range of temperature and pH

Question 2

What are methanogens?

Answer 2

organisms that produce methane from CO2 and other organic molecules, they are obligate anaerobes, and have a cell wall made up of pseudomurien, proteins, or sulfate sugars and an s-layer

Question 3

What are euryarchaota?

Answer 3

phlya with a very broad range of metabolism

Question 4

Describe Ferroplasma acidiphilum.

Answer 4

acidophiles that have no cell wall and oxidize sulfur from FeS2 to produce H2SO4

Question 5

Describe the pyrodictum sp.

Answer 5

barophilic vent hyperthermophiles (crenarchaeota), contains genes from all three kingdoms, reduces sulfur to H2S for energy, is disked-shaped, and contains cannulae that connect disks

Question 6

What are nanoarchaea?

Answer 6

archaea with a very small genomes that are obligate symbionts to host ignococcus species and shoe evidence of coevolution

Question 7

Describe sulfuolobus.

Answer 7

a type of crenarchaeota that has a no cell wall but an S layer, has a flagella, has a tetraether composed membrane, is an aerobe, and an acidophilic hyperthermophile

Question 8

Why do haloarchaea appear red?

Answer 8

due to bacterioruberin which protects cells from light