Multiple Choice
Which of the following structures is only found in some, but not all, bacterial species?
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1. Introduction to Microbiology
Members of the Bacterial World
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Which domain of unicellular prokaryotes is characterized by having cell walls that contain peptidoglycan?
A
Viruses
B
Archaea
C
Eukarya
D
Bacteria
Verified step by step guidance1
Understand the three domains of life: Bacteria, Archaea, and Eukarya. Each domain has distinct cellular characteristics.
Recall that prokaryotes are unicellular organisms without a nucleus, which includes Bacteria and Archaea, but not Eukarya.
Focus on the composition of the cell wall in these prokaryotes. Bacterial cell walls contain peptidoglycan, a polymer that provides structural strength.
Recognize that Archaea have cell walls, but they do not contain peptidoglycan; instead, they have other unique compounds like pseudopeptidoglycan or proteins.
Conclude that the domain characterized by unicellular prokaryotes with cell walls containing peptidoglycan is Bacteria.
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