Difference between Gram-positive and Gram-negative Bacteria

Medium Biology Microbiology

In microbiology, the classification of bacteria plays a crucial role in understanding their characteristics and behavior. One of the most widely used systems for bacterial classification is based on their cell wall structure. This encompasses two primary groups: Gram-positive and Gram-negative bacteria. This classification not only affects how bacteria interact with antibiotics but also influences their pathogenicity and ecological roles.

Which of the following statements accurately describes a fundamental difference between Gram-positive and Gram-negative bacteria?

Gram-positive bacteria have a thick peptidoglycan layer and retain the crystal violet stain used in Gram staining.

Gram-negative bacteria possess teichoic acids in their cell wall structure.

Gram-positive bacteria have an outer membrane that protects them from environmental stress.

Gram-negative bacteria are typically more susceptible to penicillin due to their thin peptidoglycan layer.

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