Section 1 - Lipids

Question 1

What are lipids?

Answer 1

Oils and fats

Question 2

What group of lipids are plant oils and animal fats mostly made up of?

Answer 2

Triglycerides

Question 3

What does a triglyceride consist of?

Answer 3

A molecule of glycerol with three fatty acids attached to it

Question 4

What is a fatty acid molecule?

Answer 4

A long chain of carbon atoms with an acid group (-COOH) at one end. Hydrogen atoms are attached to the carbon atoms.

Question 5

If every carbon atom in the chain is joined by a single bond, we say that the fatty acid is ___________.

Answer 5

saturated

Question 6

If one or more of the carbon bonds in the chain is a double bond, we say that the fatty acid is ____________.

Answer 6

unsaturated

Question 7

If many carbon atoms in the chain are joined by double bonds, we say that the fatty acid is _____________.

Answer 7

polyunsaturated

Question 8

What are phospholipids?

Answer 8

Phospholipids are like triglycerides, but instead of having three fatty acid chains, they have two fatty acid chains and a phosphate group.

Question 9

What are cell membranes made from?

Answer 9

A double layer of phospholipids