In the image below bacteria that have been run through the steps of the gram stain are shown as numerically labeled cells. From the drop down selections, select what color each cell type of cell (gram positive or gram negative) would be following each step of the gram stain: Step 1 Crystal violet Step 2 lodine Step 3 Alcohol wash Step 4 Safranin Gram-positive bacterial cell 1 3 5 7 Gram-negative bacterial cell 2 4 6 8 Choose the color of the cell: Cell #1: [ Select ] Cell #2: [ Select ] Cell #3: [ Select ]
Added by Justin C.
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Step 1: Crystal Violet Both Gram-positive and Gram-negative cells will be stained purple. Show more…
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Move the images of bacterial cells into the chart to illustrate the color of gram-positive and gram-negative cells after each step of the Gram stain process. Reagent Gram-Positive Gram-negative None (Heat-fixed cells) Crystal Violet (20 seconds) Gram's Iodine (1 minute) Ethyl Alcohol (10-20 seconds) Safranin (1 minute)
Sri K.
Use the micrograph of the Gram stain to draw conclusions and make predictions about the indicated bacterium. View the image in greater detail. Based on your observation of the indicated bacterium in this Gram stain, select ALL appropriate statements. The indicated bacterium is a bacillus. The indicated bacterium is a spirochete. The indicated bacterium has a strepto- formation. The indicated bacterium is Gram-negative. The indicated bacterium is Gram-positive. The indicated bacterium produces endotoxin (also known as lipopolysaccharide, LPS). Eosin Methylene Blue (EMB) or MacConkey agar would NOT be good choices of media to grow the indicated bacterium.
Dominador T.
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