Archaea

Question 1

What group was archaea identified with and what was the broad classification both fell under?

Answer 1

1. Bacteria.
2. Prokaryotes.

Question 2

What kinds of environments (specifically) are archaea best known for growing in?

Answer 2

1. Hypersaline.
2. Anaerobic.
3. High temperature.
4. pH extremes.

Question 3

What is unique about archaea amongst most microorganisms?

Answer 3

None of them cause disease.

Question 4

What is the plasma membrane lipid structure of archaea?

Answer 4

Glycerol di-and tetraethers.

Question 5

What are the cell wall constituents of an archaea?

Answer 5

1. S-layer.
2. Proteins and/or polysaccharides.
3. No peptidoglycan.

Question 6

What is the size of the archaeal ribosome?

Answer 6

70s.

Question 7

What is the motility structure of the archaea?

Answer 7

Archaelium.

Question 8

What are the 2 most common archaea shapes?

Answer 8

1. Rod.
2. Cocci.

Question 9

What are the size of the archaea rods?

Answer 9

1 to 2 um wide x 1-5 um long.

Question 10

What are the size of the archaea cocci?

Answer 10

1 to 3 um in diameter.

Question 11

What is the smallest archaea?

Answer 11

0.2 um.

Question 12

What is the largest archaea?

Answer 12

30 mm (multicellular).

Question 13

What are cell shapes that are unique to archaea?

Answer 13

1. Branched.
2. Flat-shaped.

Question 14

What does the slime layer mediate?

Answer 14

Cell-cell interactions.

Question 15

Why are archaea important to animal science?

Answer 15

They produce methane.