Consider a Culture Medium on Which Only Gram-Positive Organisms Such

question 50

Multiple Choice

Consider a culture medium on which only gram-positive organisms such as Staphylococcus aureus colonies can grow due to an elevated NaCl level. A yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the pH as a result and changing the color of a pH indicator chemical. This type of medium would be referred to as a(n)

• A) selective and differential medium.
• B) differential medium.
• C) selective medium.
• D) enrichment culture.
• E) differential and enrichment culture.

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Definitions:

Measurement

The process of quantifying objects, events, or phenomena, typically using tools or instruments to determine dimensions, quantities, or capacities.

Measurement

The process of obtaining a numerical value that represents the size, quantity, or degree of an attribute or phenomenon.

Description

The act of detailing or explaining the characteristics, features, or aspects of something.

Operational Definition

A clear, detailed description of how variables in a study are measured or categorized.