Multiple Choice
Which of the following structures is primarily responsible for regulating the movement of substances into and out of a bacterial cell?
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7. Prokaryotic Cell Structures & Functions
Bacterial Cell Morphology & Arrangements
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Which bacterial genus is typically rod-shaped (bacillus morphology) when observed under a light microscope?
A
Neisseria
B
Treponema
C
Staphylococcus
D
Bacillus
Verified step by step guidance1
Understand the term 'bacillus morphology': it refers to bacteria that are rod-shaped when viewed under a microscope.
Review the shapes associated with each bacterial genus: Neisseria are typically diplococci (round), Treponema are spirochetes (spiral-shaped), and Staphylococcus are cocci (spherical clusters).
Recall that the genus Bacillus is well-known for its rod-shaped (bacillus) morphology, which is a defining characteristic.
Confirm that the question asks for the genus with rod-shaped bacteria, which matches the Bacillus genus.
Conclude that Bacillus is the correct genus associated with bacillus (rod-shaped) morphology under a light microscope.
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