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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Definitions:

Continuation

The act of proceeding or carrying on with an activity or process without interruption.

Gestalt Psychology

A psychological approach that emphasizes the perception of whole objects rather than the individual elements.

Perception

The process by which sensory stimuli are interpreted and organized in the brain to form a coherent picture of the world.

Patterns And Configurations

Patterns and configurations denote the recognisable order in which things are arranged or occur, and the way elements are combined and oriented relative to one another.