Phospholipid

Lipid molecules are generally hydrophobic, meaning they repel water. However, phospholipids have a phosphate group that makes one end hydrophilic, allowing them to interact with water. This dual property is crucial for their role in biological systems, such as forming the structure of cell membranes.

What characteristic of lipid molecules causes them to repel water?

• Hydrophobic nature

• Hydrophilic nature

• Polar nature

• Amphipathic nature

What component of phospholipids makes one end of the molecule hydrophilic?

• Fatty acid chains

• Cholesterol

• Glycerol backbone

• Phosphate group

Why do phospholipids have mixed properties?

• They are non-polar

• They are entirely hydrophilic

• They are entirely hydrophobic

• They contain both hydrophobic and hydrophilic regions

What is one of the key roles of phospholipids in biological systems?

• Forming cell membranes

• Hormone production

• DNA replication

• Energy storage

Which of the following structures is primarily composed of phospholipids?

• Nucleus

• Cell membrane

• Cell wall

• Mitochondria