An Antigen Is

question 68

Multiple Choice

An antigen is:

• A) a phagocytic cell.
• B) used to combat infections.
• C) a molecule used by bacteria to destroy antibodies.
• D) any molecule that is recognized as foreign by the immune system.
• E) any molecule that is recognized as natural by the immune system.

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Definitions:

Component

A part or element of a larger system, device, or piece of equipment that is essential to its function.

Variable Expenses

Costs that change in relation to the level of activity or volume of production.

Fixed Expenses

Costs that do not vary with the level of production or sales over a short period, such as rent and salaries.

Relevant Costs

Future costs that will differ under various alternatives, considered important for making financial decisions.