Amino Acids Are Not Excreted Intact. Rather

question 42

Multiple Choice

Amino acids are not excreted intact. Rather,

• A) the nitrogen-containing amino group is recycled while the remainder of the molecule is excreted in the urine.
• B) the nitrogen-containing amino group is removed and converted to urea, which is excreted in the urine.
• C) the carboxylic acid group is removed, neutralized by the bile, and excreted in the feces.
• D) the side-chain group is removed and excreted while the reminder of the molecule is recycled.

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Definitions:

MC (Marginal Cost)

The increase in total production cost that comes from making or producing one additional unit of a product or service, a concept critical in economic theory for determining the optimal production level.

Shutdown Point

The level of production and price where a firm's total revenue just covers its variable costs, below which it would cease operations.

AVC (Average Variable Cost)

The total variable cost divided by the number of units produced, indicating the variable cost per unit.

MC (Marginal Cost)

The cost incurred by producing one more unit of a product or service.