Lab 1 Gram positive Flashcards
1
Q
What kind of a stain is the gram stain?
A
a differential stain
2
Q
how many types of cells are there?
A
two
gram positive
gram negative
3
Q
what is the gram positive colour change?
A
violet
4
Q
What is the colour change of gram negative?
A
pink
5
Q
How do you find gram negative?
A
stain as you would gram positive but then add alcohol and then safranin
6
Q
what is primary stain?
A
the stage where both gram negative and positive are the same
7
Q
mordant
A
forms it into an insoluble complex in gram positive cells
8
Q
what do gram positive cells look like after decolorization?
A
purple
9
Q
what is a counterstain?
A
safranin
10
Q
peptifoglycan
A
gram positive cells have a thick layer of this
