Over Which Issue Has the United States Most Frequently Exerted

question 10

Multiple Choice

Over which issue has the United States most frequently exerted its veto in the UN Security Council?

• A) the 2003 war in Iraq
• B) China's actions in the South China Sea
• C) the Arab-Israeli-Palestinian conflict
• D) sanctions against Russia

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Definitions:

Amphipathic

Refers to molecules having both hydrophobic (water-repelling) and hydrophilic (water-attracting) parts, enabling interactions with both water and lipids.

Cholesterol

A type of lipid found in the blood that is essential for building cells but can lead to heart disease if levels are too high.

Hydroxyl Group

The hydroxyl group consists of an oxygen atom bonded to a hydrogen atom (-OH), commonly found in alcohols and responsible for their polar properties.

Peripheral Proteins

Proteins that are attached to the surface of the membrane and are not embedded within the lipid bilayer, playing roles in cell signaling and structure.