What is the decolorizer used in the Gram stain procedure?

A_________ is a mucoid polysaccharide or polypeptide layer that lies outside the cell wall and is not easily removed.  This structure is unstained in the procedure you did in lab and appears as a white halo between the cells and the colored background.

Which of the following is considered to be a differential staining procedure? 

(Mannitol Salt Agar (MSA))  For what group of organisms is the medium selecting?

Which of the following catalyzes the reaction of super oxide anions into hydrogen peroxide?

The thickness of which cellular component determines a bacterium’s result in the Gram stain reaction?

In the Narrative of Frederick Douglass, which of the following is not one of the overseers under whom Douglass grows up?

3)    Mitochondria and chloroplasts contain their own DNA.

(Columbia CNA with 5% Sheep Blood Agar)  The red bloods cells have been completely destroyed (lysed) by the bacterium which appears as clear zones near the bacterial growth.

(Eosin Methylene Blue (+Lactose) Agar (EMB+Lac))  What is one component (selective agent) in the medium that stops the growth of other organisms?