Blog

Staining with acidic dyes like nigrosin?? 

Heat (steam) is required to make some target structures permeable to the primary stain. Therefore, heat acts as a _____?    

Scientific nomenclature typically gives information about an organism.  List the two morphological characteristics of the bacterium   Bacillus megaterium.  Bacillus =  [a]  megaterium = [b] 

Fill in the blanks with:  the names of the dyes, other chemicals, and the color of cells following each step!!!!!  I.  Primary Stain = [a]                Gram- positive =   [b]          (color of cells)         Gram-negative =  [c]           (color of cells) II. Mordant = [d]     III.  Decolorization =   [e]               Gram-positive =  [f]             (color of cells)              Gram-negative = [g]             (color of cells)  IV.  Counterstain = [h]               Gram-positive = [i]                (color of cells)             Gram-negative = [j]                (color of cells)  

Which of the following are used when separating one species from another  using the preferred best method?

What structure does light pass through immediately after leaving the condenser in a compound light microscope?  

Counterstains have contrasting color to the primary stain.  

List the two major differential staining techniques:             [a]              [b] 

The purpose of staining cells on a microscope slide is to     

Assume you stain Bacillus megaterium by applying malachite green with heat and then counterstaining with safranin. Through the microscope, the green structures are