Textbook Question
Intracellular reticulate bodies of this gram-negative bacterium convert to elementary bodies that can infect a new host cell.
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7. Prokaryotic Cell Structures & Functions
Gram-Negative Cell Walls
Multiple Choice
Which term describes a toxin that is part of the outer membrane in a Gram-negative bacterial cell?
A
Enterotoxin
B
Neurotoxin
C
Endotoxin
D
Exotoxin
Verified step by step guidance1
Step 1: Understand the difference between endotoxins and exotoxins. Exotoxins are proteins secreted by bacteria, often Gram-positive, and have specific targets and effects.
Step 2: Recognize that endotoxins are components of the outer membrane of Gram-negative bacteria, specifically part of the lipopolysaccharide (LPS) layer.
Step 3: Recall that endotoxins are not secreted but are released when the bacterial cell wall is disrupted or the bacteria die.
Step 4: Note that enterotoxins and neurotoxins are types of exotoxins that affect the intestines and nervous system, respectively, and are not structural components of the bacterial membrane.
Step 5: Conclude that the term describing a toxin that is part of the outer membrane in Gram-negative bacteria is 'endotoxin'.
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