Lipids

Question 1

How can you tell it is a saturated fat by the structure?

Answer 1

The added glycerol

Question 2

Do saturated fatty acids have one or two bonds?

Answer 2

one

Question 3

true or false: Unsaturated fatty acids have single bonds

Answer 3

False: they have double bonds

Question 4

Do polyunsaturated fatty acids have double bonds?

Answer 4

Polyunsaturated fatty acids have double bonds between all carbons

Question 5

What does hydrogenation lead to?

Answer 5

It leads to trans-fats

Question 6

How does hydrogenation work?

Answer 6

1. Liquid oils converted to solid fats
2. Heating veg oils in presence of hydrogen
3. Double bonds in unsaturated fats become
   saturated - filled with hydrogens
4. Trans-fat acids are produced
5. Hydrogenated oil is harder at room temp
6. Tub margarine is less hydrogenated and has
   fewer trans-fatty acids than brick margarine
7. Not good for our hearts

Question 7

Talk about saturated fats:

Answer 7

saturated fats contain no double bonds all carbons are singular bonded and all carbon atoms are holding al the hydrogen they can and usually are in animal products

Question 8

Talk about unsaturated fats:

Answer 8

Unsaturated contains double bonds and are usually liquid at room temp and usually plant products

Question 9

What is cholesterol?

Answer 9

Cholesterol is a waxy substance that lines our arteries and stretches them.

Question 10

What types of cholesterol is there?

Answer 10

There is LDL which is low density lipoproteins which is bad for us and then HDL which is high density lipoproteins which is good for us.

Question 11

How much does 1g of lipids give us in energy?

Answer 11

38kj

Question 12

What are the functions of lipids in our bodies?

Answer 12

• it forms a layer of fat under our skin for warmth
• offers protection to organs
• Keeps hair and skin healthy
• delays hunger
• valuable source of fat-soluble vitamins K,A,D,E