Podcast
Questions and Answers
What is the primary reason for staining microorganisms in microscopy?
What is the primary reason for staining microorganisms in microscopy?
- To resolve the problem of microorganisms appearing colorless (correct)
- To observe the shape and size of the microorganisms
- To identify the type of microorganisms
- To determine the pH of the microorganisms
What is the composition of stains?
What is the composition of stains?
- A complex salt of a dye acid with a dye base
- A mixture of a cation and an anion (correct)
- A mixture of a basic dye and an acidic dye
- A mixture of a chromophore and a chromogen
What is the role of the chromophore in a stain?
What is the role of the chromophore in a stain?
- It is the negatively charged ion in the stain
- It is the complex salt of a dye acid with a dye base
- It is the positively charged ion in the stain
- It is the unsaturated group of molecules capable of producing color (correct)
Why are basic dyes more frequently used for staining bacteria?
Why are basic dyes more frequently used for staining bacteria?
What is the result of using acidic dyes for staining bacteria?
What is the result of using acidic dyes for staining bacteria?
What is the purpose of negative staining?
What is the purpose of negative staining?
What is a neutral stain composed of?
What is a neutral stain composed of?
What is the term for a compound that contains a chromophore?
What is the term for a compound that contains a chromophore?
What is the net charge of bacteria at a pH of 7?
What is the net charge of bacteria at a pH of 7?
What can be seen more easily using negative staining?
What can be seen more easily using negative staining?
What type of ion is the chromophore in an acidic dye?
What type of ion is the chromophore in an acidic dye?
Why do basic dyes bind to bacterial cells?
Why do basic dyes bind to bacterial cells?
What is the name of the complex salt of a dye acid with a dye base?
What is the name of the complex salt of a dye acid with a dye base?
What is the term for an unsaturated group of molecules that produces color?
What is the term for an unsaturated group of molecules that produces color?
What is the purpose of staining microorganisms?
What is the purpose of staining microorganisms?
What is the result of using a basic dye on a bacterial cell?
What is the result of using a basic dye on a bacterial cell?
What type of charge does a bacterial cell have at pH 7?
What type of charge does a bacterial cell have at pH 7?
What is the term for a compound that contains a chromophore?
What is the term for a compound that contains a chromophore?
