Flashcards- Ch 5 Part II: Lipids

Front

Element make-up of lipids

Back

All lipids contain CHO (Carbon, Hydrogen, Oxygen)

Phospholipids will also contain P (Phosphorus)

Front

Functional groups involved in chemical reactions of lipids

Back

Reactions involve hydroxyl group to carboxyl group

Front

Lipids are a diverse group of organic compounds; what property unites all lipids?

Back

They are grouped together because they are hydrophobic.

Front

Solubility of lipids

Back

Lipids are insoluble in water.
They will dissolve in nonpolar solvents.

Front

Lipids are not true polymers.

Back

They are still considered macromolecules, but they are not true polymers because they have specific and finite building blocks rather than many repetitive monomers.

Front

Three main categories of lipids

Back

1. Fats (triglycerides)

2. Phospholipids

3. Steroids

Front

Fats (triglycerides) are composed of how many types of subunits?

Back

Two types of subunits:
1 glycerol and 3 fatty acid chains.

Front

Describe the structure of glycerol in fats

Back

Glycerol is a 3-carbon alcohol, with each carbon having a hydroxyl group (-OH).

Front

Describe the structure of fatty acid chains

Back

Each fatty acid chain contains a carboxyl group and a long hydrocarbon chain or "tail."

Front

Why are fatty acid chains hydrophobic and insoluble in water?

Back

The nonpolar C-H bonds make the chain hydrophobic and insoluble in water.