Lipids

Question 1

which has more double bond oil or fat

Answer 1

oil

Question 2

monounsaturated fatty acid

Answer 2

contain 1 C=C double bond

Question 3

polyunsaturated fatty acid

Answer 3

contain multiple C=C double bonds

Question 4

as double bonds increase what decreases

Answer 4

energy
melting point

Question 5

where is the primary site of lipid digestion/absorption

Answer 5

small intestine

Question 6

physical emulsification

Answer 6

mixing in stomach as food enters small intestine

Question 7

chemical emulsification

Answer 7

bile mixed with digesta at duodenum

Question 8

what is a micelle

Answer 8

fat droplet

Question 9

where are fatty acids < 10 C absorbed to

Answer 9

directly to blood

Question 10

where are fatty acids >12 C absorbed to

Answer 10

intracellular TAG formation

Question 11

3 phases of fat absorption in SI

Answer 11

emulsification
enzymatic digestion
absorption

Question 12

two types of emulsification

Answer 12

physical(stomach)
chemical(bile dependent)

Question 13

what happens in absorption phase in SI

Answer 13

MAG and FFA diffuse from micelle into enterocyte
bile is absorbed in ileum

Question 14

T/F microbes in the LI act on undigested lipids

Answer 14

TRUE

Question 15

T/F TAG is easy for ruminants to digest

Answer 15

FALSE. usually fed less than 5%

Question 16

glycolipid
-what is it found in
-where is sugar located
-what animals is it most common for

Answer 16

plants
contains sugar at sn1 position
primary lipid in grazing animals

Question 17

Phospholipids

Answer 17

comes from microbial phospholipid

Question 18

T/F phospholipids are the primary source of lipids digested in SI of ruminants

Answer 18

TRUE

Question 19

purpose of B48

Answer 19

stabilize lipoprotein
confer specialty(nametag)
stimulate enzymatic functions

Question 20

when does the lipoprotein become a chylomicron

Answer 20

when it travels to the Golgi apparatus and gains CHO

Question 21

basic formula of a fatty acid

Answer 21

CH3-(CH2)n-COOH

Question 22

what attachment is polar head group on

Answer 22

sn3

Question 23

what attachment are unsaturated fatty acids on

Answer 23

sn2

Question 24

what attachment are saturated fatty acids on

Answer 24

sn1

Question 25

T/F lipids are digested by hydrolytic enzymes

Answer 25

TRUE

Question 26

T/F lipids are important for synthesis of hormones

Answer 26

TRUE

Question 27

what position do lingual lipase and gastric lipase attack

Answer 27

sn3

Question 28

what position does pancreatic lipase attack

Answer 28

sn1and Sn3

Question 29

mammalian enzymes involved in lipid digestion

Answer 29

Lingual Lipase
gastric lipase
phospholipase
pancreatic lipase
acyl CoA synthetase

Question 30

Job of lingual and gastric lipase

Answer 30

TAG->DAG at sn3
important for babies to digest milk

Question 31

T/F lingual and gastric lipase are found in large amounts in adults

Answer 31

FALSE

Question 32

purpose of phospholipase

Answer 32

hydrolyze phospholipids in reticulorumen

Question 33

purpose of pancreatic lipase

Answer 33

hydrolyze ester bonds at sn1 and sn2 position

Question 34

purpose of colipase

Answer 34

creates bonding site for pancreatic lipase

Question 35

purpose of acyl CoA synthetase

Answer 35

synthesize ester bonds

Question 36

T/F acyl CoA synthetase can not bond to FFA < 11C

Answer 36

TRUE

Question 37

purpose of lysolecithin

Answer 37

desorb SFA from feed particles

Question 38

what products of lipid digestion can be fermented to make VFAs

Answer 38

glycerol
sugar