Arkeae

Question 1

Who is Carl Woese?

Answer 1

Proposed 3 domain system

Question 2

3 Domains?

Answer 2

1. Bacteria
2. Eukaryotes
3. Archaebacteria

Question 3

Norm Pace?

Answer 3

Used PCR 16s RNA to discover new phyla of archea

Question 4

Archaeal Genomes- Similarities to bacteria?

Answer 4

Circular genome
has operons
small

Question 5

Archaeal Genomes- Similarities to eukaryotes?

Answer 5

has introns
RNA polumerase, TBP, TFB
has histones

Question 6

Archaea Phylas?

Answer 6

1. Thaumarchaeota
2. Nanoarchaeota
3. Korarchaeota
4. Crenarchaeota
5. Euryarchaeota

Question 7

Thaumarchaehota

Answer 7

archaea
live at psychrophilic temps
ice and seawater in Antarctica
All have Type 1 topoisomerase, like euks
also live at mesophilies

Question 8

Crenarchaeota

Answer 8

archaea
extremely thermophilic
acidophilies
sulfur dependent
strict anaerobes

Question 9

Korarchaeota

Answer 9

archaea
earliest linage branch from universal tree
not cultured yet
hyperthermophilic

Question 10

Nanoarchaeota

Answer 10

archaea
parasites of Crenarcheota
smallest cell size and genome
not cultured yet

Question 11

Euryarchaeota

Answer 11

1. Methanogens
2. Halobacteria
3. Thermoplams
4. Extremely thremophilic S- metabolizers
5. Sulfate Reducers

Question 12

Methanogens

Answer 12

Euryarchaeta
make methane
hydrogen oxidizers
largest group

Question 13

Halobacteria

Answer 13

Euryarchaeota
grow @ high salt concentration, halophiles
photoheterotrophs
phototaxis

Question 14

Thermoplames

Answer 14

Euryarchaeota
LACK CELL WALLS
no s layer
grow well at low pH

Question 15

Extremly thremophilic S- metabolizers

Answer 15

Euryarchaeota
anaerobes
sulfur as e-acceptor
hold record for highest growth temp

Question 16

Sulfate Reducers

Answer 16

Euryarchaeota
fermentation or reduce sulfate to sulfide
oxidize acetate