The Gram Stain: Background and Example Organisms


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question 1 of 3

A differential staining procedure works on the principle that

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1. Gram-positive bacteria have cell walls with

2. Gram-negative bacteria have cell walls with

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About This Quiz & Worksheet

These online assessment tools will help you strengthen your understanding of the Gram stain method. You will be asked about differential staining, Gram-positive and Gram-negative bacteria.

Quiz & Worksheet Goals

As part of these assessments, you will be evaluated on:

  • The principle of a differential staining procedure
  • The characteristics of Gram-positive and negative bacteria
  • The general characteristics of Gram staining
  • Describing images in the terms discussed in this lesson

Skills Practiced

The following skills are used in these assessment tools:

  • Reading comprehension - ensure that you draw and retain the most important information on Gram staining from the related lesson on this topic
  • Defining key concepts - ensure that you can accurately define Gram staining, Gram-positive and Gram-negative bacteria, and differential staining
  • Information recall - access the knowledge you've gained regarding Gram staining
  • Knowledge application - use your knowledge to answer questions about Gram staining

Additional Learning

For more about Gram staining, review the introductory lesson that is called The Gram Stain: Background & Example Organisms. Topics covered by this lesson include:

  • Define gram staining as the predominant method of bacterial investigation
  • Define the process of Gram staining
  • Discuss the differential staining procedure
  • Differentiate between Gram-positive and Gram-negative bacteria