The Substances in Cell Membranes That Form a Barrier to the Movement

question 83

Multiple Choice

The substances in cell membranes that form a barrier to the movement of materials across the membrane are

• A) nucleic acids.
• B) external proteins.
• C) carbohydrates.
• D) internal proteins.
• E) lipids.

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Definitions:

Inscription

is a written or engraved message, often found on monuments, coins, or buildings, providing historical, commemorative, or identifying information.

Engaged Column

A half-round column attached to a wall. See also pilaster.

Pilaster

A flat, rectangular, vertical architectural element that protrudes slightly from the wall, resembling a column but mainly ornamental and not structural.

Ossuaries

Containers or rooms in which the bones of dead people are placed, often used when space in burial sites is limited.