Classes of Lipids Flashcards

Questions and Answers

What is the definition of a lipid?

A biomolecule that is soluble in water

A biomolecule that is more soluble in nonpolar solvents than in polar ones (correct)

A family of biomolecules only found in polar solvents

None of the above

What are the main functions of waxes?

Protection and waterproofing

What are triacylglycerols commonly known as?

Fats and oils

What is the structure of glycerophospholipids?

Glycerol backbone with 2 fatty acids and PO4-amino alcohol Signup and view all the answers

What is the structure of sphingolipids?

Sphingosine backbone attached to a fatty acid and a PO4-amino alcohol Signup and view all the answers

What is the main structure characteristic of steroids?

Contains a nucleus of four fused carbon rings Signup and view all the answers

What is the structural composition of prostaglandins?

5 membered ring with 2 chains Signup and view all the answers

Study Notes

Classes of Lipids

Lipids: Biomolecules predominantly soluble in nonpolar solvents; generally insoluble in water, playing crucial roles in energy storage and cell structure.

Types of Lipids

Wax:
- Similar to esters with extended R groups, leading to insolubility.
- Functions include protection and waterproofing surfaces.
Triacylglycerols (Triglycerides):
- Composed of glycerol bonded to three fatty acids through ester linkages.
- Primarily responsible for energy storage in the body.
Glycerophospholipids:
- Made from glycerol, with two fatty acids and a phosphate group linked to an amino alcohol.
- Essential for forming cell membranes, providing structure and protection.
Sphingolipids:
- Feature a sphingosine backbone resembling an "L" shape, connected to a fatty acid and a phosphate-amino alcohol.
- Important for the integrity of nerve cell membranes.
Steroids:
- Characterized by four fused carbon rings; lack fatty acid structures.
- Serve as hormones that regulate various biological functions.
Prostaglandins:
- Derived from fatty acids, having a unique 5-membered ring structure with two chain-like appendages.
- Act as localized chemical messengers with hormone-like effects.

Description

Test your knowledge on the different classes of lipids with these flashcards. This quiz covers key biomolecules such as lipids, waxes, and triacylglycerols, along with their definitions and functions. Perfect for students studying biochemistry or related fields.