Multiple Choice
Following an endospore stain, how can endospores be distinguished from vegetative cells under the microscope?
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7. Prokaryotic Cell Structures & Functions
Introduction to Bacterial Cell Walls
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Which of the following is a mechanism used by bacterial endospores to protect their DNA?
A
Release of exotoxins
B
Small acid-soluble spore proteins (SASPs) bind to DNA
C
Production of a thick peptidoglycan layer
D
Flagella formation around the DNA
Verified step by step guidance1
Understand that bacterial endospores are highly resistant structures formed to protect the bacterial genome under harsh conditions.
Recognize that the protection of DNA in endospores involves specific molecules that bind and stabilize the DNA, preventing damage from heat, UV radiation, and chemicals.
Identify that Small Acid-Soluble Spore Proteins (SASPs) are the key molecules that bind tightly to DNA in endospores, altering its conformation and protecting it from damage.
Note that other options like release of exotoxins, thick peptidoglycan layers, or flagella formation do not directly contribute to DNA protection within endospores.
Conclude that the mechanism used by bacterial endospores to protect their DNA is the binding of SASPs to the DNA.
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