Which of the Following Makes It Necessary for Animal Cells

question 25

Multiple Choice

Which of the following makes it necessary for animal cells, although they have no cell walls, to have intercellular junctions?

• A) Cell membranes do not distinguish the types of ions and molecules passing through them.
• B) Large molecules, such as proteins and RNA molecules, do not readily get through one, much less two, adjacent cell membranes.
• C) Cell-to-cell communication requires physical attachment of one cell to another.
• D) Maintenance of tissue integrity and barriers to fluid leakage requires cells to adhere tightly to one another.
• E) The relative shapelessness of animal cells requires a mechanism for keeping the cells aligned.

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Definitions:

Market Shares

The portion of a market controlled by a particular company, measured by sales volume or revenue compared to competitors.

Concentration Ratio

A measure used to evaluate the extent of market control held by the largest firms within an industry.

Antitrust Laws

Legislation designed to promote fair competition for the benefit of consumers, by preventing monopolies and promoting business practices that encourage competition.

Price-fixing

An illegal agreement among competitors to set prices, limit supply, or engage in other activities to maintain high prices and restrict competition.