You Need to Determine If a Pure Culture of Bacteria

question 18

Multiple Choice

You need to determine if a pure culture of bacteria is gram-positive or gram-negative, but you've just spilled your only solution of crystal violet so you can't do a Gram stain.You decide to try a lysozyme treatment on a sample of each culture and then examine the samples under the microscope.The expected result is

• A)gram-positives will lyse and appears as debris; gram-negatives will lyse but more slowly.
• B)gram-positives will lyse and appears as debris; gram-negatives will be unaffected.
• C)gram-positives will lyse and appears as debris; gram-negatives will lose cellular morphology and appear as cocci.
• D)gram-negatives will lyse and appears as debris; gram-positives will lose cellular morphology and appear as cocci.
• E)gram-negatives will lyse and appears as debris; gram-positives will be unaffected.

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