Microbiology, 5/e

Lansing M Prescott, Augustana College
Donald A Klein, Colorado State University
John P Harley, Eastern Kentucky University

The Archaea

Multiple Choice Quiz

Choose the best answer


1	Archaea usually grow in a few restricted or specialized habitats, such as
		A)	anaerobic
		B)	hypersaline
		C)	extremely hot
		D)	extremely cold
		E)	all of these


2	Methanogenic bacteria are archaea that are
		A)	strict anaerobes that obtain energy through the synthesis of methane.*
		B)	strict anaerobes that obtain energy through the consumption of methane.
		C)	strict aerobes that obtain energy through the synthesis of methane.


3	The archaea lack which of the following that are normally found in gram-negative bacteria?
		A)	outer membrane
		B)	a complex peptidoglycan network
		C)	they lack both outer membrane and a complex peptidoglycan network
		D)	they lack neither outer membrane nor a complex peptidoglycan network


4	Which of the following is currently the largest group of archaea?
		A)	extreme halophiles
		B)	methanogens
		C)	extreme thermophiles
		D)	sulfate reducers


5	Methanogens are potentially of great importance because
		A)	they produce methane.
		B)	they consume methane.
		C)	methane is an excellent energy source.
		D)	both a and c
		E)	both b and c


6	Archaea may constitute up to __________% of the procaryotic biomass in Antarctic surface waters.
		A)	23
		B)	28
		C)	34
		D)	43


7	Which of the following have been suggested to be among the first living organisms to have developed?
		A)	Methanococcus
		B)	Methanopyrales
		C)	Methylococcus
		D)	None of the above is correct.


8	Extreme halophiles are found in
		A)	animal intestines
		B)	salt lakes
		C)	the Antarctic ice mass

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