Which of the following is not a shape seen in prokaryotes?

Question

BlackTom AI · Accepted Answer

When evaluating bacterial morphologies, several shapes are standardly observed, while others are not common in prokaryotes.
Option: Spheres. Cocci (spherical bacteria) are a well-known, frequent prokaryotic shape, so this option describes a shape that definitely appears in prokaryotes.
Option: Icosahedrons. An icosahedral geometry is characteristic of many viral capsids, not typical bacterial cell shapes; prokaryotes are not described as forming icosahedral cells in standard microbiology texts, making this a shape not seen in prokaryotes.
Option: Spirals. Spiral-shaped bacteria, such as spirilla and spirochetes, are classic prokaryotic forms, so this option represents a shape that is indeed seen in prokaryotes.
Option: Rods. Rod-shaped bacteria, known as bacilli, are among the most common prokaryotic morphologies, clearly making this a familiar prokaryotic shape.
In summary, options describing cocci, spirilla/spirochetes, and bacilli are consistent with prokaryotic shapes, while the icosahedral form is not typically associated with prokaryotic cell morphology.

Which of the following is not a shape seen in prokaryotes?

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