110DT Year 1 Exam Revision

?
  • Created by: vdagnan
  • Created on: 17-04-14 14:09
What are fat/lipids made from
Carbon, hydrogen and oxygen
1 of 30
What are the three types of lipids
Triglcerides, Phospholipids, sterols (cholesterol)
2 of 30
Explain the structure of a triglyceride
One glycerol molecule with three fatty acids
3 of 30
Explain the reaction of the ester bonds
Bonds form between the -OH group of the glycerol and the -COOH hroup of the fatty acid (esterification). A molecule of water is lost
4 of 30
medium chain fatty acid?
6-12
5 of 30
Long chain fatty acid?
>12
6 of 30
One end of a fatty acid contains the -COOH acid group what is on the other end?
CH3 Methyl group
7 of 30
What is a glycerol?
A 3 carbon alcohol
8 of 30
Where are tryglcerides found?
Fats and oils in food
9 of 30
What is the structure of a phospholipids?
Glcerol with two fatty acids and a phosphate group
10 of 30
What are the functions of the phospholipids?
Keeps fat suspended in water, component of cell membranes, transport and emulsifiers
11 of 30
What are the food sources of phospholipids?
Egg yolks, liver, soybeans, peanuts
12 of 30
What are the functions of cholesterol?
Component of cell membranes, precurser to other substances (vit D, Sterol hormones, Bile salts
13 of 30
What food is cholsterol found?
animal foods
14 of 30
Trans fatty acids are usually a process of hydrogenisation but occur naturally inwhich animals?
Beef, lamb, Mutton
15 of 30
Describe the structure of this fatty acid 20:4 n-6
20 carbon bonds, 4 double bonds and the first double bod is on the 6th carbon nearest the methyl end
16 of 30
The n-3 or omega 3 family of unsaturated fatty acids are called?
Alphalinolenic acid
17 of 30
n-6 or omega 6 family aer called?
Linoleic acid
18 of 30
n-9 are called?
Oleic acid
19 of 30
Which are the two 'essential' fatty acids
Linoleic Acid and Alpha-linolenic acid
20 of 30
Why are these fatty acids essential?
because vertabrates are unable to synthesise these fatty acids as we lack the enzymes to introduce double bonds at n-3 and n-6 (It can only form double bonds after the 9th carbon)
21 of 30
What fatty acid can be synthesised from Linoleic Acid (omega 6)?
Arachidonic acid
22 of 30
What fatty acid can be synthesised from Alpha linolenic acid (omega 3)?
Eicosapentanoic acid (EPA) and Docosahexanoiv acid (DHA)
23 of 30
Where can EPA and DPA be found?
In oily fish
24 of 30
Name 6 good sources of linoleic acid (omega 6)
Meat, Eggs, Nuts (walnut, brasil nut, almond, peanut), seeds used for oil and spreads (corn, safflower, sunflower, soya, sesame, whatgerm, pumpkin, evening primrose oil)
25 of 30
Name 6 good sources of Alpha Linolenic acid (Omega 3)
Darg green leafy vegetables, meat from grass fed ruminants, oils from nuts and seeds, (walnut, peanut, almond, soya, linseed, rapeseed and hemp seeds
26 of 30
What is the COMA recommendation for total fat intake for adults?
no more than 35% of food energy
27 of 30
What is the digestion enzyme in the small intestine?
Pancreatic lipase
28 of 30
What are the carriers of fat in the blood called
Lipoproteins
29 of 30
What are the four main types of lipoprotein?
Chylomicrons, Very low density lipoproteins, Low density lipoproteins and High density lipoproteins
30 of 30

Other cards in this set

Card 2

Front

What are the three types of lipids

Back

Triglcerides, Phospholipids, sterols (cholesterol)

Card 3

Front

Explain the structure of a triglyceride

Back

Preview of the front of card 3

Card 4

Front

Explain the reaction of the ester bonds

Back

Preview of the front of card 4

Card 5

Front

medium chain fatty acid?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Fats resources »