Which of the Following Is the Best Explanation for Why

question 19

Multiple Choice

Which of the following is the best explanation for why cholesterol decreases the permeability of biological membranes?

• A) Cholesterol binds to the outside surface of a membrane, thus blocking the movement of solutes.
• B) Because cholesterol is amphipathic, it forms tiny vesicles that trap solutes.
• C) Because cholesterol is amphipathic, it fits in between the phospholipids and blocks diffusion through the membrane.
• D) Cholesterol has four rings in its structure that can sequester ("trap") solutes.

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Definitions:

HIV Infections

A medical condition caused by the human immunodeficiency virus, which attacks the immune system and can lead to AIDS if not treated.

Women

Female adults; often refers to human females after reaching reproductive age but can encompass all ages.

Greatest Risk

The highest likelihood of experiencing a negative outcome or event.

HIV

A virus known as Human Immunodeficiency Virus targets the immune system and may result in Acquired Immunodeficiency Syndrome (AIDS) without proper treatment.