chem lab - lipids Flashcards Preview

Botany > chem lab - lipids > Flashcards

Flashcards in chem lab - lipids Deck (103)
Loading flashcards...
1

hydrophobic isoprenoids

A, D, E, K

2

are PUFAs
-must be provided in our diet because EFAs cannot be biosynthesized

EFAs

3

1. Fatty-acid related :

fatty acid/prostaglandins, fatty acid esters, sterol esters, lipoconjugates

4

2. Hydrolyzable/saponifiable:

fatty acid esters, sterol esters, lipoconjugates

5

-aliphatic, acyclic, unbranched

fatty acids

6

fatty acid synthesis in humans:

liver and lactating mammary glands

7

most naturally occurring FA contain odd or even no. of C atoms

EVEN

8

-no C=C
-CnH2n+1 COOH
-___anoic acid

saturated

9

-CnH2n-1COOH
- ____enoic acid

unsaturated

10

– natural configuration of C=C

Cis configuration

11

-introduces a kink, allowing a bend
-bend disrupts alignment of lipid → semi-fluid

Cis configuration

12

2 EFAs to humans

1. Linoleic acid –
2. Linolenic acid

13

precursor of arachidonic acid

linoleic

14

– precursor of PGs
-becomes essential if linoleic acid is missing

Arachidonic acid

15

– alkali salts of Fa
-formed by saponification
-amphipathic
-nonpolar + dirt, polar + water (micelle)

4. Soaps

16

5. Halogens add to C=C via

AE

17

– resistant to oxidation outside the body

saturated FA

18

slowly but spontaneously oxidized by oxygen in air
-becomes rancid (formation of short chain aldehydes)

USFA-

19

-derived from linoleic acid (or arachidonic acids) forming eicosanoids

PROSTAGLANDINS

20

-cyclopentane ring, 2 side chains, carboxyl group in one side chain

PROSTAGLANDINS

21

-participate in wound-healing process

PROSTAGLANDINS

22

PAIN MEDIATORS

PROSTAGLANDINS

23


-esters formed between a fatty acid (CA) and glycerol (trihydric alcohol)

Acyglycerols or glycerides

24

-3 Fatty acids + glycerol

TRIGLYCERIDES

25


-neutral fats or neutral oils

TRIGLYCERIDES

26

-most widespread

TRIGLYCERIDES

27

-most abundant lipids in animals (function: food store)

TRIGLYCERIDES

28

Hydrolysis of tripalmitin or 1,2,3-tripalmitoyl-sn-glycerol

• 1 mole of glycerol
• 3 moles of palmitic acid

29

Hydrolysis of palmitostearoolein or 1-palmitoyl-2-stearoyl-3-oleoyl-sn-glycerol

• 1 mole glycerol
• 1 mole palmitic acid
• 1 mole stearic acid
• 1 mole oleic acid

30

Hardening of oils is due to what reaction

-hydrogenation of C=C → saturated compounds

Decks in Botany Class (324):