Multiple Choice
Which cellular component found in some bacterial cells enhances their ability to cause disease by protecting them from host immune responses?
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7. Prokaryotic Cell Structures & Functions
Introduction to Bacterial Cell Walls
Multiple Choice
Which term best describes a small, circumscribed lesion containing pus that may be associated with bacterial infection?
A
Papule
B
Pustule
C
Macule
D
Vesicle
Verified step by step guidance1
Understand the definitions of each lesion type: A macule is a flat, discolored spot on the skin; a papule is a small, raised, solid bump; a vesicle is a small fluid-filled blister; and a pustule is a small, circumscribed lesion containing pus.
Recognize that pus is a thick fluid composed of dead white blood cells, bacteria, and tissue debris, typically indicating an infection, often bacterial in origin.
Identify that the presence of pus specifically distinguishes a pustule from other lesion types, as papules and macules do not contain fluid or pus, and vesicles contain clear fluid rather than pus.
Match the description 'small, circumscribed lesion containing pus' to the term that best fits this characteristic, which is a pustule.
Conclude that the correct term for a small lesion with pus, often linked to bacterial infection, is 'pustule'.
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