The order of reagents in the Gram stain reaction are
A. safranin, alcohol, methylene blue, iodine.
B. crystal violet, iodine, alcohol, safranin.
C. methylene blue, alcohol, safranin.
D. crystal violet, alcohol, iodine, safranin.
B
You might also like to view...
Propose why it would be advantageous for a photosynthetic microorganism to have more than one type of chlorophyll or bacteriochlorophyll
What will be an ideal response?
A deletion was engineered into the coding sequence of DnaK of Escherichia coli. This mutation would most likely result in:
A. an increase of heat shock proteins. B. an increase in DnaJ. C. a temperature-sensitive bacteria. D. a temperature-resistant bacteria. E. a result that cannot be determined.
Nonfastidious (rapidly growing), aerobic bacterial organisms can be saved up to 1 year on __________ slants
a. Mycosel agar b. MacConkey agar c. Löwenstein-Jensen medium d. trypticase soy agar (TSA)
What feature of the plasma membrane is primarily responsible for the selective uptake and export of ions and molecules from the cell?
A. cellular membranes exhibit fluid-like properties B. the phospholipid lipid bilayer has a hydrophobic interior C. the extracellular leaflet is rich in glycolipids and glycoproteins D. many transmembrane proteins can rotate and move laterally in the plasma membrane