Why Can Direct Microscopy Not Be Used to Provide a Presumptive

question 23

Multiple Choice

Why can direct microscopy not be used to provide a presumptive identification of the enteric bacteria?

• A) Some members of the genus Gram stain weakly.
• B) The microscopic characteristics are indistinguishable from other gram-negative bacteria.
• C) Some members of the genus do not decolorize well and appear gram-positive.
• D) Some members have very thick capsules, and these do not allow the penetration of the Gram stain.

---

Definitions:

Overhead

Indirect costs not directly associated with the production of goods or services, such as administrative expenses and rent.

Variable Production Costs

Variable production costs are expenses that vary directly with the level of production, such as raw materials and direct labor costs.

Fixed Costs

Costs that do not vary with the volume of production or sales, such as rent, salaries, and insurance expenses.

Net Advantage

The overall financial benefit gained from a particular investment or business decision, considering all relevant costs and revenues.