Lipids

Question 1

Function of Triglycerides

Answer 1

1. provide energy
2. satiety
3. texture and flavour in food
   4.regulation of metabolism

Question 2

Function of phospholipids

Answer 2

1. Maintain the structure of cells
2. Emulsifier

Question 3

Sterols (plant and animal)

Answer 3

plant: phytosterols
animal: cholestrol

Question 4

SML length of the carbon chain

Answer 4

S: 4-6
M: 8-12
L: 14

Question 5

Saturated fatty acids (Plant source)

Answer 5

-mainly in animal fat
- bad for health
Plant source: palm kernel and coconut oil

Question 6

Unsaturated fatty acid

Answer 6

Polyunsaturated: more than two double bond
Monounsaturated: one double bond
-found in plants

Question 7

Hydrogenation

Answer 7

e.g margarine
convert liquid to solid fats
-decrease in unsaturation and conversion of cis to trans
-resist rancidity

Question 8

Rancidity

Answer 8

-exposure to heat and oxygen
-make oil taste bad
-make double bond destroyed and converted to others

Question 9

Omega3 (heart friendly)
Alpha Linolenic acid (ALA)

Answer 9

dark green veg, alternative is fish supplements

Question 10

Chylomicron function

Answer 10

transport dietary fat into blood and to tissue of the body

Question 11

LDL function

Answer 11

transport cholestrol to the cells of the body

Question 12

VLDL function

Answer 12

Transport endogenous lipids to body

Question 13

HDL function

Answer 13

transport cholesterol from tissue back to the liver