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Home Q & A Board Biology-Related Homework Help Cell Biology
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smooth15 smooth15
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11 years ago
I have a lab and its on comparing prokaryotes and eukaryotes, we have three stains DNA Iodine and Janus Green. Our teacher said omething about using these stains to figure oout whether the cells are gram positive or negative i just need to know what that means Help!
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#1
11 years ago
it's called a gram stain.  if the microbe stains, then it is said to be gram positive... if it doesn't stain (or stains poorly), then it's gram negative.

you have to use all the stains to complete the gram staining process
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#2
11 years ago
Gram positive/gram negative has to do with the cell walls of different types of bacteria.  Gram positive staining bacteria have a certain outer layer of cell wall, and gram negative have a different outer layer.  As far as the reasoning goes why the bacteria stain the way they do?  I don't think there is a clear answer.
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