Lipids

Question 1

Biomolecules that stores energy

Answer 1

Lipids

Question 2

Lipids are ____ in organic solvents and ____ in water.

Answer 2

Soluble, insoluble

Question 3

____ lipids are those that can be converted to smaller moleculed by hydrolysis

Answer 3

Hydrolyzable or saponifiable

Question 4

Structurally, most hydrolyzable lipids contains ____ unit.
A. Ether
B. Ester
C. Hydroxyl
D. Carboxyl

Answer 4

B

Question 5

Esters from a high molecular weight alcohol and fatty acid. Very hydrophobic and presents water loss in plants

Answer 5

Waxes

Question 6

Most abundant among lipids. Commonly known as fats and oils, as triesters of glycerol and fatty acids

Answer 6

Triacyclglycerols/Triglycerides (TAGS)

Question 7

List the name of the ff saturated C10-C20 Fatty acids

C10
C12
C14
C16
C18
C20

Answer 7

Capric
Lauric
Myristic
Palmitic
Stearic
Arachidic

Question 8

Lipids from animal sources. Forms straight chains, more compact and has higher MP

Answer 8

Saturated Fatty Acids

Question 9

Lipids from plant sources. It has one or more double bonds, less compact and has lower MP

Answer 9

Unsaturated fatty acid

Question 10

True or false. In saturated fatty acid, the higher the number of carbons, the melting point decreases

Answer 10

False. MP also increase

Question 11

In unsaturated fatty acids, as the number of double bond increases, the melting point decreases.

Answer 11

True

Question 12

True or false. The degree of unsaturation of oil depends on the average number of double bonds in it’s fatty acid

Answer 12

True

Question 13

Fatty acid with two or more double bonds are called ____

Answer 13

Polyunsaturated Fatty Acid (PUFA)

Question 14

Naturally occuring mono unsaturated fatty acid contains less than 10 carbons including crotonic acid.

Answer 14

False. 10 or more w/ exception crotonic acid

Question 15

PUFA’s must be in trans (E) configuration.

Answer 15

False. Cis (Z)

Question 16

Identify which among the following are the omega 3 fatty acids and omega 6 fatty acids.

1. Arachidonic acid
2. Eicosapentanoic acid
3. Alpha-linoleic acid
4. Linoleic acid
5. Docosahexaenoic acid

Answer 16

1. Omega 6 FA
2. Omega 3 FA
3. Omega 3 FA
4. Omega 6 FA
5. Omega 3 FA

Question 17

These FA should be supplied through diets. Includes omega 3 and omega 6 FA

Answer 17

Essential FA

Question 18

The ideal ratio of omega-3 and omega-6 in diet is _____ to _____

Answer 18

1:3 to 1:5

Question 19

Organic derivatives of phosphoric acid, formed by replacing two H by R group.

Answer 19

Phospholipids

Question 20

____ are phospholipids derived from glycerol while _____ are derived from sphingosine

Answer 20

Phosphoacylglycerols
Sphingomyelins

Question 21

Second most abundant type of lipids

Answer 21

Phosphoacylglycerols

Question 22

Two types of phosphoacylglycerols: phosphatidylethanolamine or _____ (-CH2CH2NH3^+) and phosphotidylcholine or ______ (-CH2CH2N(CH3)3^+).

Answer 22

Cephalin, lecithin

Question 23

Lipids that cannot be broken down into simpler units by aqueous hydrolysis

Answer 23

Non hydrolyzable lipids

Question 24

Identify the ff.
Vit. A
Vit. D
Vit. E
Vit. K

Answer 24

Retinol
Cholecalciferol
Tocopherol
Phylloquinone

Question 25

Biologically active compound derived from arachidonic acid

Answer 25

Eicosanoids

Question 26

Lipids composed of repeating units of isoprene

Answer 26

Terpenes

Question 27

Biologically active tetracyclic lipids: three 6-membered ring and one 5-membered ring

Answer 27

Steroids

Question 28

Steroids secreted by the endocrine glands. Further classified as adrenal cortical steroids.

Answer 28

Hormones

Question 29

Cholesterol is synthesized in the body from ____ , a C30 triterpene

Answer 29

Squalene

Question 30

Cholesterol is synthesized in the body from ____ , a C30 triterpene

Answer 30

Squalene