Multiple Choice
Which of the following best describes a typical prokaryotic cell?
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1. Overview of Cell Biology
Prokaryotic Cell Architecture
Multiple Choice
Lipopolysaccharide (LPS) is an important cell envelope component characteristic of which type of prokaryotic cell wall?
A
Gram-negative bacteria (outer membrane)
B
Archaea with pseudomurein cell walls
C
Gram-positive bacteria (thick peptidoglycan layer)
D
Mycoplasma species lacking a cell wall
Verified step by step guidance1
Understand that lipopolysaccharide (LPS) is a molecule found in the outer membrane of certain prokaryotic cells.
Recall the structural differences between Gram-positive and Gram-negative bacteria: Gram-positive bacteria have a thick peptidoglycan layer but lack an outer membrane, while Gram-negative bacteria have a thin peptidoglycan layer and an outer membrane.
Recognize that LPS is a major component of the outer membrane, which is characteristic of Gram-negative bacteria.
Note that Archaea have different cell wall compositions, such as pseudomurein, and do not contain LPS.
Understand that Mycoplasma species lack a cell wall entirely and therefore do not have LPS.
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