BIO181 Chapter 2

Front

What type of reaction involves the removal of water to form a bond?

Back

Dehydration reaction.

Front

What type of reaction involves the addition of water to break a bond?

Back

Hydrolysis reaction.

Front

Do phospholipids have 2 polar tails and a non-polar head?

Back

False. Phospholipids have 2 fatty acid tails (non-polar) and a phosphate group (polar) head.

Front

What is the main component of cell membranes?

Back

Phospholipids.

Front

What is a chain of organic molecule 'building blocks' called?

Back

Polymer.

Front

What is the basic unit of a polymer?

Back

Monomer.

Front

Are fatty acids the monomers of lipids?

Back

False. Lipids do not have true monomers like proteins or carbohydrates.

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (polar) head and two hydrophobic (non-polar) tails.

Front

What role do phospholipids play in biological membranes?

Back

They form a bilayer that acts as a barrier to protect the cell.

Front

What type of lipid is characterized by a four-ring structure?

Back

Steroids.