Lipids

Question 1

What are lipids?

Answer 1

Non-polymer, biological molecules that are insoluble in water
Made of fatty acids combining with an alcohol molecule

Question 2

What is a fatty acid?

Answer 2

A long hydrocarbon tail attached to a carboxyl head.
Can be saturated or unsaturated

Question 3

What is an unsaturated fatty acid?

Answer 3

Contain double carbon to carbon bonds
Causes the tail to kink and reduces melting point

Question 4

What is a saturated fatty acids?

Answer 4

Contain no double carbon bonds
Long straight chain
High melting point

Question 5

What is an ester bond?

Answer 5

Bond formed when an acid reacts with an alcohol through a condensation reaction
COO

Question 6

What is a triglyceride?

Answer 6

Glycerol reacted with 3 fatty acids in a condensation reaction
Forms 3 water molecules
Non-polar and insoluble in water

Question 7

What is the function of a triglyceride?

Answer 7

-energy source
-good insulators
-can be used as a water source

Question 8

What are phospholipids?

Answer 8

2 fatty acids bonded with an ester bond to a phosphate group through a condensation reaction.
Polar with a hydrophilic head and hydrophilic tail
Soluble in water

Question 9

What is the function of phospholipids?

Answer 9

Cell membranes