Multiple Choice
In the Gram stain, why must fresh (young) bacterial cells be used to obtain reliable results?
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9. Microscopes
Gram Stain
Back9. Microscopes
Gram Stain
- Multiple ChoiceIn a standard Gram stain, what color do Gram-negative bacteria typically appear after the safranin counterstain is applied?84views
- Multiple ChoiceWhich of the following would you include when performing a Gram stain?87views
- Multiple ChoiceWhich of the following correctly lists the steps of the Gram stain procedure in the proper order?116views
- Multiple Choice
A scientists has a sample with two different species of bacteria. The first species is Staphylococcus aureus, a gram-positive bacterium. The second species is Escherichia coli, a gram-negative bacterium. The scientist gram-stains his sample of bacteria. What colors will the two species of bacteria be after staining?
1146views11rank - Multiple Choice
Which of the following statements is false?
1408views7rank - Multiple ChoiceAfter performing a Gram stain, why do Gram-positive bacteria appear purple under the microscope?154views
- Multiple ChoiceThe Gram-staining procedure is best described as which of the following?142views
- Multiple ChoiceIn a completed Gram stain procedure, what is the final color of Gram-negative bacteria when observed under a microscope?130views
- Multiple ChoiceWhich dye stains gram-negative bacteria pink during the Gram stain procedure?114views
- Multiple Choice1. Why is it important to use fresh bacterial cells when performing a Gram stain?144views
- Multiple ChoiceIn the Gram stain procedure, which reagent is used as the decolorizer to remove the crystal violet–iodine complex from Gram-negative cells?72views
- Multiple ChoiceIn the Gram stain procedure, what is the correct sequence of reagents applied to a heat-fixed bacterial smear (excluding the initial water rinse)?100views
- Multiple ChoiceWhich of the following describes the correct sequence of the Gram stain procedure?147views
- Multiple Choice
Which of the following reagents is used to stain gram negative cells pink (or red) in the gram stain?
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