Multiple Choice
Which group of bacteria is unusual in that they lack peptidoglycan in their cell walls?
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1. Introduction to Microbiology
Members of the Bacterial World
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Which of the following best describes the typical arrangement of staphylococci bacteria?
A
They form spiral-shaped filaments.
B
They form chains of cells.
C
They form irregular grape-like clusters.
D
They form pairs of cells.
Verified step by step guidance1
Understand the morphology and arrangement of bacteria, which refers to the shape and how bacterial cells group together after division.
Recall that 'staphylococci' refers to spherical (coccus) bacteria that tend to cluster together.
Recognize that the prefix 'staphylo-' means 'grape-like clusters,' indicating that these bacteria group irregularly in clusters resembling bunches of grapes.
Contrast this with other arrangements: 'strepto-' means chains, 'diplo-' means pairs, and spiral-shaped bacteria are called 'spirilla' or 'spirochetes'.
Conclude that the typical arrangement of staphylococci is irregular grape-like clusters, which is a key identifying feature in microbiology.
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