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What is the Gram stain result for Spirochaetes?

Practice Questions

Q1
What is the Gram stain result for Spirochaetes?
  1. Gram-positive
  2. Gram-negative
  3. Gram-variable
  4. Gram-nonreactive

Questions & Step-by-Step Solutions

What is the Gram stain result for Spirochaetes?
  • Step 1: Understand what Gram stain is. It is a laboratory technique used to classify bacteria based on their cell wall structure.
  • Step 2: Know that there are two main types of bacteria based on Gram stain: Gram-positive and Gram-negative.
  • Step 3: Learn that Spirochaetes are a group of bacteria that have a specific structure in their cell walls.
  • Step 4: Identify that Spirochaetes do not retain the crystal violet stain used in the Gram stain process.
  • Step 5: Conclude that because they do not retain the stain, Spirochaetes are classified as Gram-negative bacteria.
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