Exam 4: Archaeal Cell Structure

_______ are the site of protein synthesis in the cell.

Diglycerol tetraether lipids

Because archaeons lack peptidoglycan in their cell walls

Archaeons are not known to incorporate (fix)carbon dioxide.

External structures that are found in Archaea but not Bacteria are ___.

Unlike members of the Bacteria,most archaeons have linear chromosomes with multiple origins of replication.

Archaeal membranes contain which of the following lipids?

Archaeal cell walls

Some methanogenic Archaea are capable of fixing nitrogen.

Molecules or regions of molecules that readily interact with water are said to be __________,whereas molecules or regions of molecules that are insoluble in water or do not readily interact with water are said to be hydrophobic.

Which of the following contribute(s)to the differences between the Archaea and the bacteria?

Archaeons have been isolated from temperate and cold environments.

The cell membranes of wall-less archaeons are strengthened by

Methanogens may contribute to the greenhouse effect and global warming due to methane production.

Some archaeal cells lack a cell wall.

A feature unique to some archaeal plasma membranes is that they may

Unlike other prokaryotes,archaeons (except Sulfolobus)have two origins of replication.

Archaeal flagella are superficially similar to bacterial flagella,although archaeal flagella are much thicker than bacterial flagella.

The hydrocarbons found in the membranes of archaea are identical to those found in bacteria.

The DNA of some archaeons is stabilized by association with archaeal histone proteins forming particles resembling eucaryotic nucleosomes.