Multiple Choice
Which cell structures does Neisseria gonorrhoeae primarily use to attach to and enter host epithelial cells?
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1. Introduction to Microbiology
Introduction to Bacteria
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The cell wall of Mycobacterium tuberculosis is considered which of the following because it is difficult to stain?
A
Acid-fast
B
Capsulated
C
Gram-positive
D
Gram-negative
Verified step by step guidance1
Understand the unique characteristics of Mycobacterium tuberculosis, particularly its cell wall composition.
Recall that Mycobacterium tuberculosis has a high lipid content in its cell wall, mainly due to mycolic acids, which makes it resistant to conventional staining methods like Gram staining.
Recognize that because of this resistance to standard stains, a special staining technique called the acid-fast stain is used to identify Mycobacterium tuberculosis.
Know that the term 'acid-fast' refers to bacteria that retain the primary stain even after being washed with an acid-alcohol solution, indicating a waxy, lipid-rich cell wall.
Conclude that Mycobacterium tuberculosis is classified as acid-fast due to its cell wall properties that make it difficult to stain with regular methods.
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