Multiple Choice
In bacterial cell morphology, spirilla are best described as which of the following?
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7. Prokaryotic Cell Structures & Functions
Bacterial Cell Morphology & Arrangements
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Which of the following bacterial genera is classically rod-shaped (bacillus morphology) when observed by light microscopy?
A
Bacillus
B
Neisseria
C
Treponema
D
Staphylococcus
Verified step by step guidance1
Step 1: Understand the term 'bacillus morphology' which refers to bacteria that are rod-shaped when viewed under a light microscope.
Step 2: Review the typical shapes associated with each bacterial genus listed: Bacillus, Neisseria, Treponema, and Staphylococcus.
Step 3: Recall that Bacillus species are known for their rod-shaped (bacillus) morphology.
Step 4: Recognize that Neisseria are typically diplococci (round-shaped pairs), Treponema are spiral-shaped (spirochetes), and Staphylococcus are spherical clusters (cocci).
Step 5: Conclude that among the options, Bacillus is the genus classically exhibiting rod-shaped morphology.
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