How Do Discs, Like the One in the Accompanying Figure

question 163

Multiple Choice

How do discs, like the one in the accompanying figure, commonly store items?

• A) in random locations anywhere between the center of the disc and the edge of the disc
• B) in multiple pie-shaped sections that break a track into arcs
• C) in a single track that spirals from the center of the disc to the edge of the disc
• D) in multiple concentric tracks from the center of the disc to the edge of the disc

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Definitions:

Isotonic Solution

Solution that is equal in solute concentration to that of the cytoplasm of a cell; causes cell to neither lose nor gain water by osmosis.

Solute Concentration

A measure of the amount of a solute that is dissolved in a solvent, determining the solute's proportion in a solution.

Selectively Permeable Membrane

A membrane that only allows specific molecules or ions to pass through it by active or passive transport.

Osmosis

The movement of water molecules through a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.