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Which of the following statements regarding prokaryotes is false?
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1. Introduction to Microbiology
Introduction to Bacteria
Scelta multipla
Which types of bacterial cells may possess a cell wall?
A
Only Gram-positive bacteria
B
Both Gram-positive and Gram-negative bacteria
C
Neither Gram-positive nor Gram-negative bacteria
D
Only Gram-negative bacteria
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Understand the structure of bacterial cell walls: Bacterial cell walls provide shape and protection, and their composition differs between Gram-positive and Gram-negative bacteria.
Recall that Gram-positive bacteria have a thick peptidoglycan layer in their cell wall, which retains the crystal violet stain during Gram staining.
Recall that Gram-negative bacteria have a thinner peptidoglycan layer but also possess an outer membrane; they do have a cell wall, but it is structurally different from Gram-positive bacteria.
Recognize that both Gram-positive and Gram-negative bacteria possess cell walls, although their composition and structure vary.
Conclude that the correct answer is that both Gram-positive and Gram-negative bacteria may possess a cell wall.
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