GRE Subject Test: Biology : Identifying Archaea

Study concepts, example questions & explanations for GRE Subject Test: Biology

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Example Questions

Example Question #2 : Archaea

Which of these choices is not a characteristic present in archaea?

Possible Answers:

70S ribosome

Glycerol diethers in lipid bilayers

Cell walls are made of peptidoglycan

Chromosomes and plasmids are circular

S-layer

Correct answer:

Cell walls are made of peptidoglycan

Explanation:

Only bacterial have peptidoglycan cell walls. The other traits are typical of at least some known archaea. The s-layer involves crystalline arrays of proteinaceous subunits, which are common to some archaea and bacteria.

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