Questions: contribute to the flexibility, structure, and proper functioning of cell membranes. Multiple Choice Carbohydrates Phospholipids Saturated fatty acids Fat-soluble vitamins

The answer is the second one (Phospholipids): contribute to the flexibility, structure, and proper functioning of cell membranes.

Explanation for each option:

• Carbohydrates: While carbohydrates are important for cell recognition and signaling, they do not primarily contribute to the flexibility and structure of cell membranes.
• Phospholipids: Phospholipids are the main components of cell membranes. They form a bilayer that provides flexibility, structure, and proper functioning of the membrane.
• Saturated fatty acids: Saturated fatty acids can be part of the phospholipids, but they tend to make the membrane less flexible due to their straight chains.
• Fat-soluble vitamins: These vitamins can be important for various cellular functions, but they do not primarily contribute to the structure and flexibility of cell membranes.

Summary: Phospholipids are the key components that contribute to the flexibility, structure, and proper functioning of cell membranes.