What is the primary stain, mordant, decolorizing agent, and counterstain of the Gram stain protocol? What is the purpose of each? How does the protocol result in gram-positive cells staining purple and gram-negative cells staining pink?
What will be an ideal response?
Ans: Primary stain: imparts color on all cells
Mordant: to intensify the color of the primary stain
Decolorizing agent: may or may not remove the primary stain from the cell
Counterstain: if the primary stain is removed, the decolorized cellular components will accept and assume the contrasting color of the counterstain.
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Carl Woese was an important figure in microbial classification and changed our understanding of the evolution and diversity of life. What breakthrough did he make that allowed us to infer evolutionary relationships between organisms?
What assumptions was his breakthrough based on? What will be an ideal response?
A chlorophyll molecule consists of four nitrogen atoms surrounding a magnesium core and
a. one fatty acid. b. two fatty acids. c. three fatty acids. d. four fatty acids
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A. Type B thinking B. Type A thinking C. hardiness D. foolishness
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