Which of the Following Is a Principle of the Fluid

question 38

Multiple Choice

Which of the following is a principle of the fluid mosaic model of cell membrane structure?

• A) All proteins associated with the cell membrane are contained in a fluid layer on the outside of the cell.
• B) Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains.
• C) The lipid bilayer is a solid at body temperature, thus protecting the cell.
• D) Phospholipids form a bilayer that is largely impermeable to water- soluble molecules.

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Definitions:

Short-Run Average Total Cost (ATC₂)

The total cost divided by the quantity produced in the short-run, where some inputs are fixed.

Diminishing Marginal Returns

A principle stating that if one factor of production is increased while others are kept constant, the resulting increase in output will eventually decline.

Short-Run Average Total Cost (ATC)

The total cost per unit of output in the short run, where some factors of production are fixed.

Profit-Maximizing Level

The output level at which a firm achieves the highest profit, where marginal revenue equals marginal cost.