Upgrade to remove ads
MCB EXAM 3 QUIZ 10
Terms in this set (11)
Many species in the phylum Crenarchaeota are considered extreme thermophiles or _________, which can grow at temperatures above 100°C.
Methanogens may contribute to the greenhouse effect and global warming due to methane production. All biologically-produced methane on Earth is produced by methanogenic Archaea.
The Crenarchaeota, Thaumarchaeota, and Euryarchaeota are
the three phyla of the Archaea
An organism with a temperature growth optimum near 80°C and a pH growth optimum between two and three is usually referred to as a(n)
A defining feature of the halophilic microorganisms is
absolute dependence on a high concentration of NaCl for growth
Microbes called the group I archaea or mesophilic Crenarchaeota that were found to oxidize ammonia in marine environments are now placed in the phylum
Although originally thought to be only present in extreme habitats, now we know many Archaea do inhabit temperate and tropical waters as well as in/on the human body
A modified cell membrane that carries out photosynthesis using bacteriorhodopsin in the absence of chlorophyll is called the ________ membrane.
The photosynthetic membrane of Halobacterium salinarium contains
Bacteriorhodopsin (also called archaerhodopsin)
Archaerhodopsin (formerly called bacteriorhodopsin) is a light-driven proton pump that forms a pH gradient without an electron transport chain. Nevertheless, this pH gradient can be used to power the synthesis of ______ by a chemiosmotic mechanism
The three archaeal phyla, Euryarchaeota, Crenarchaeota, and Thaumarchaeota are currently recognized by Bergey's Manual. However, researchers have proposed at least a dozen additional phyla, but these are not yet recognized by Bergey's. This is because:
The discovery of these additional phyla was through metagenomics studies; these archaea have not yet been cultured.
YOU MIGHT ALSO LIKE...
Ch 7 Quiz
Microbio Exam 1
MBIO FINAL (Previous Tests)
OTHER SETS BY THIS CREATOR
CAP exam 1
MCB EXAM 3 Quiz 13
MCB EXAM3 QUIZ 12
MCB EXAM 3 QUIZ 11