lipids, definitions of lipids etc

Question 1

Define lipids

Answer 1

heterogenous group of water insoluble organic molecules

Question 2

Body lipids are found in what three places

Answer 2

• membrane associated lipids
• droplets of triacylglycerol in adipocytes
• transported in plasma as lipoproteins

Question 3

List 4 roles and functions of lipids

Answer 3

• energy source
• hydrophobic layer
• fat soluble vitamins as coenzymes
• prostaglandins and steroid hormones

Question 4

90% of dietary intake of lipids are

Answer 4

TAG

Question 5

-fatty acids
-TAGs
-phospholipids
-steroids
-glycolipids
are what ?

Answer 5

common classes of lipids

Question 6

fatty acids are a long chain hydrocarbon molecule containing what at one end?

Answer 6

carboxylic acid moiety (COOH)

Question 7

_______are energy sources for tissues IE liver and muscle

Answer 7

Fatty acids

Question 8

_______serve as components of membrane lipids (phospholipids)

Answer 8

fatty acids

Question 9

Fatty acids serve as a major component of stored fat in the form of______

Answer 9

triacyclglycerols (TAGS)

Question 10

_________precursor for proteinoids

Answer 10

Fatty acids

Question 11

Fatty acids are________ and consist of _______hydrocarbon chain

Answer 11

amphipathic, hydrophobic

Question 12

Although fatty acids are amphipathic they are predominantly______

Answer 12

hydrophobic

Question 13

Fatty acids are highly water insoluble T/F?

Answer 13

T

Question 14

Fatty acids are transported by a ______ or _______

Answer 14

lipoprotein, albumin

Question 15

Numbering of fatty acids always begins with

Answer 15

carbon of a carboxylic acid group

Question 16

How many carbon chains is palmitic acid

?

Answer 16

16

Question 17

Fatty acids with no carbon double bond are termed

Answer 17

saturated

Question 18

Fatty acids with a carbon-carbon double bond are termed

Answer 18

unsaturated

Question 19

saturated fats have a _______melting point and _____energy

Answer 19

higher, more

Question 20

Saturated fats are saturated by what?

Answer 20

electrons

Question 21

Essential fatty acids are obtained how?

Answer 21

via diet

Question 22

Name two important fatty acids

Answer 22

linoleic acid and a-linolenic acid

Question 23

linoleic acid is important for?

Answer 23

precursor to arachidonic acid

Question 24

a-linolenic acid is important for?

Answer 24

precursor for growth and development

Question 25

a-linoleic acid is similar to?

Answer 25

fish oil omega 3