Why Are Lipids and Proteins Free to Move Laterally in Membranes

question 65

Multiple Choice

Why are lipids and proteins free to move laterally in membranes?

• A) The interior of the membrane is filled with liquid water.
• B) Lipids and proteins repulse each other in the membrane.
• C) Hydrophilic portions of the lipids are in the interior of the membrane.
• D) There are only weak hydrophobic interactions in the interior of the membrane.
• E) Molecules such as cellulose can pull them in various directions.

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Definitions:

Spontaneous Recovery

The reappearance of a learned response after extinction has occurred and time has passed, in classical conditioning.

Time Lapse

A photographic technique that captures a sequence of frames at set intervals to show changes that take place slowly over time.

Generalization

The process of forming general statements or conclusions from specific instances.

Extinguished CR

In classical conditioning, this refers to the gradual weakening and eventual disappearance of the conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned stimulus.