Cells naturally have a negative charge. What are some compounds that give cells this negative charge? 2. We wash away the dye when we make a positive stain, but not when we make a negative stain. a. What would you see in your microscope if you made a positive stain and did not wash away the dye? b. What would you see in your microscope if you made a negative stain and did wash away the dye?
Cells naturally have a negative charge. What are some compounds that give cells this negative charge? 2. We wash away the dye when we make a positive stain, but not when we make a negative stain. a. What would you see in your microscope if you made a positive stain and did not wash away the dye? b. What would you see in your microscope if you made a negative stain and did wash away the dye?
Chapter16: Testing Testing
Section: Chapter Questions
Problem 3MC
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Please answer all parts as they are related to each other
1. Cells naturally have a negative charge. What are some compounds that give cells this
negative charge?
2. We wash away the dye when we make a positive stain, but not when we make a negative
stain.
a. What would you see in your microscope if you made a positive stain and did not wash
away the dye?
b. What would you see in your microscope if you made a negative stain and did wash away
the dye?
3. Draw an example of what you might expect to see under the microscope if you were
looking at the following microbes. Use the genus name to determine cell shape and
arrangement. Remember that positive and negative stains look different as well!
a. Negative stain of Diplococcus pneumoniae
b. Positive stain of Streptobacilus ratti
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