The Gram-Negative Bacillus That Can Be Described as Oxidase-Negative, Nitrate-Positive

question 4

Multiple Choice

The gram-negative bacillus that can be described as oxidase-negative, nitrate-positive, indole-negative, citrate-positive, methyl red-positive, urease-negative, H₂S-positive is

• A)Klebsiella pneumoniae.
• B)Proteus vulgaris.
• C)Salmonella enteritidis.
• D)Escherichia coli.
• E)Shigella sonnei.

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Definitions:

MC < MR

A condition in economic theory indicating that to maximize profit, a firm should produce more units as long as the marginal cost (MC) of producing an extra unit is less than the marginal revenue (MR) gained by selling it.

Profits

The financial gains attained when the revenues from business activities exceed the expenses, costs, and taxes needed to sustain them.

Lowering Price

The act of reducing the cost at which goods or services are sold, often to attract more customers or match competitors' offers.

Pure Monopolist

A single seller in a market with no close substitutes for the product, giving the seller complete control over price.