When a Membrane Is Freeze-Fractured, the Bilayer Splits Down the Middle

question 39

Multiple Choice

When a membrane is freeze-fractured, the bilayer splits down the middle between the two layers of phospholipids. In an electron micrograph of a freeze-fractured membrane, the bumps seen on the fractured surface of the membrane are

• A) peripheral proteins.
• B) phospholipids.
• C) carbohydrates.
• D) integral proteins.
• E) cholesterol molecules.

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Definitions:

Positive Reinforcement

A technique in behavior modification that involves providing a reward following a desired behavior to increase the likelihood of its recurrence.

Disruptive Behaviour

Actions that disturb or interrupt normal processes, events, or activities, often marked by aggression or defiance.

Criticize

To express disapproval of someone or something based on perceived faults or mistakes.

Resistance To Extinction

The persistence of a learned behavior even after reinforcement is no longer presented, often observed in conditioning studies.