Lipids

Question 1

Lipids

Answer 1

• Insoluble in water
• Fats consist of complex polymer of fatty acid attached to glycerol
• Many lipids consist of a glycerol molecule with three fatty acids attached
  o Commonly called a triglyceride

Question 2

• Saturated

Answer 2

o Internal carbon atoms in fatty acid chain are bonded to two hydrogen atoms
 Maximum hydrogen atoms possible
o Solid at room temperature

Question 3

• Unsaturated

Answer 3

o Fewer hydrogen atoms

Question 4

• Monounsaturated

Answer 4

o One double bond

Question 5

• Polyunsaturated

Answer 5

o More than one double bond

o Low melting point

Question 6

• Terpenes

Answer 6

o Long-chain lipids

 Pigments such as chlorophyl

Question 7

• Steroids

Answer 7

o Four carbon rings

Question 8

• Prostaglandins

Answer 8

o 20 lipids
 Modified fatty acids with two nonpolar tails attached to a 5-carbon ring
 Local chemical messenger

Question 9

• Fats are excellent energy-storage molecules

Answer 9

• Most fats produced by animals are saturated

o Plants unsaturated

Question 10

• Phospholipids

Answer 10

o Complex lipid molecules

 Most important molecules of the cell

Question 11

o 3 subunits

Answer 11

	Glycerol
•	Backbone of the phospholipid molecule
	Fatty acid
•	Two fatty acids are attached to the glycerol backbone
	Phosphate group
•	Attached at one end of the glycerol