Lipid Structure and Function Concepts

The video tutorial introduces lipids, dividing them into hydrolyzable and non-hydrolyzable categories. It explains the energy storage role of triglycerol and the structural functions of phospholipids, sphingolipids, and waxes. Phospholipids are highlighted for their role in cell membranes, while sphingolipids are noted for their importance in nerve cells. Waxes are described as hydrophobic barriers. The video emphasizes the hydrolyzable nature of these lipids, allowing them to be broken down into smaller units.

What is the primary function of triglycerol in the human body?

• Structural support

• Energy storage

• Hormone production

• Cell signaling

Which element is a key component of phospholipids?

• Sulfur

• Nitrogen

• Carbon

• Phosphorus

What unique feature do phospholipids have that allows them to form cell membranes?

• They have both polar and non-polar sections

• They are entirely non-polar

• They are entirely polar

• They are hydrophilic

What is the role of the phosphodiester bond in phospholipids?

• It forms the polar head

• It provides energy

• It stores genetic information

• It acts as a hormone

What is the primary structural role of sphingolipids in the body?

• Hormone production

• Insulation of nerve cells

• Energy storage

• Cell signaling

What is the base molecule for sphingolipids?

• Cholesterol

• Sphingosine

• Glycerol

• Triglycerol

Which lipid is primarily found in the myelin sheath of nerve cells?

• Waxes

• Sphingolipids

• Phospholipids

• Triglycerol

What characteristic of waxes makes them effective barriers against water?

• They are amphipathic

• They are very hydrophobic

• They are highly polar

• They are hydrophilic

What type of reaction can break down waxes into smaller units?

• Oxidation reaction

• Hydrolysis reaction

• Reduction reaction

• Dehydration reaction

Which of the following lipids is not hydrolyzable?

• Sphingolipids

• Phospholipids

• Triglycerol

• Cholesterol